George Barnsdale

Project descriptionHamilton House is a Grade II Renaissance style building located in the heart of London. It has recently undergone significant modernisation to preserve its historic charm while meeting contemporary safety and energy efficiency standards. The renovation focused on installing timber double glazed windows on the top floor and fire resistant timber windows in the stairwell, seamlessly blending the building’s Victorian architecture with cutting edge timber window technology.Renovation and innovationOwned by Dorrington Plc, Hamilton House, situated in the Whitefriars Conservation Area, has been transformed from a tired and dated office building into a selection of modern “plug and play” offices for small and medium sized businesses.Led by architects dMFK (de Metz Forbes Knight), the project set out to recapture the charm of the original building whilst making it fit for 21st century office working. This combination of renovation and innovation involved stripping back the 20th century additions like the ugly suspended ceilings alongside the addition of modern technology and meeting facilities.One of the larger parts of the project was the restoration of the stairwell and the reinstatement of the windows to the central lightwell. Having already worked with George Barnsdale on previous projects, Jamie Barwick, Asset Manager at Dorrington wanted to entrust this part of the project to the Spalding based timber windows manufacturer.Function and beauty combinedThe designs of the fire windows had to be functional and beautiful – something George Barnsdale works hard to achieve through extensive research and innovative manufacturing techniques.Pyrostop glass with stainless steel spacers was selected with a reeded design that emulates the glass on the lighting and lift.Reeded glass shown here on the lift shaft is emulated in the new fire windows on the stairwell.The hardwood timber (fire rated 60:30) is designed for a slower burn time and is finished in a colour to match F&B no 264 inside and white RAL 2016 outside.The arched shaping and tall slim profiles creates an elegant aesthetic that is mirrored in the staircase design and the lift shaft.Fire escape – form and functionOutside, the fire escape is functional and much safer thanks to the installation of the new timber fire windows. Since it is an enclosed area, it was vital that a fire within the building be effectively contained as people escape via this route.Windows with a viewAt the top of the building, the original windows and french doors were beyond repair and were replaced with modern timber double glazed ones. One of a limited number of listed properties in the area to gain planning permission for double glazing the new fenestration helps the building perform better thermally and acoustically.A number of sets of sliding sash windows and an interesting triangular fixed sash have been installed on the 8th floor.This project clearly demonstrates what can be achieved in bringing historical buildings back to life. It is possible to retain the character and charm of the old whilst adhering to new building regulations around fire, thermal performance and ventilation.Steve Dixon, Director, George BarnsdaleDesigned by Architect Sir William Emerson in 1880, Hamilton House remains both a safe and sustainable landmark for years to come thanks to 21st century window technology and the building’s custodian Dorrington.

Project descriptionRubbing shoulders with the likes of Ferrari and Louboutin, Berkeley Square claims to be the finest business address in London. Twenty Berkeley Square in Mayfair is a Grade A office and retail project which has been designed by architects Barr Gazetas and it takes “retrofit” to a whole new level inside and out! The scheme comprises 22000 sq ft of office space over eight floors with a 2000 sq ft restaurant on the ground floor.Originally a 1930s art deco property, Twenty Berkeley Square is aimed at a clientele that is used to the finer things, including bespoke concierge services and high quality interior design. There are landscaped roof terraces overlooking the square and “club quality commuter amenities”.Such elegance is enhanced by its eco credentials; the project set out to be net carbon zero and BREEAM “Outstanding”. To achieve this, among other things, the fenestration needed to be ultra high performance which can be challenging with a listed building. This is where George Barnsdale came in.How do you deliver high performance and historic aesthetics?Barr Gazetas has worked with George Barnsdale on the production and installation of previous projects so they knew the UK manufacturer’s expertise.Two key demands for the building and key selling points were extensive natural light and fresh air through open sliding sash windows. When Steve Dixon, Director at Barnsdale was approached about the project, he had already worked on a number of listed buildings requiring sign off by Westminster Council’s Conservation Team. This gave him and the design team a head start in developing the right solution."The fenestration really was a key part of this project, it was essential to get it right."Steve Dixon, Director, George BarnsdaleA total of 129 sliding box sash windows were required fully installed according to the project’s plan of works. The client opted for Grandis Hardwood (FSC certified) with toughened glass bottom sashes and float glass in the top sashes. Elegant astragal bars were included and the frames were finished in timeless traffic white (RAL 9016). Polished brass hardware and a traditional pulley system completes the traditional aesthetic that is energy efficient and respectful of the building’s heritage.Collaboration key to design processThe design process for projects like this can be quite complicated but this wasn’t the case on this occasion.“The contractor – Collins Construction and the architects Barr Gazetas were great to work with. If I was going to sum up this project, it would be: ‘Why can’t they all be like this?'”Hayden Darley, Technical DirectorHaving worked with George Barnsdale on previous projects, Barr Gazetas understood the need to balance aesthetics with performance. This can mean that some windows may be very slightly different to the originals in order to meet the high performance requirements, but they were very close and in keeping with the style of the building.The approval process ran smoothly because the technical team had had a good design meeting with the architects prior to issuing any drawings. This meant that no revisions were required because all aspects of the specification were discussed and agreed in advance.When the windows were installed by the Barnsdale team, there were few other trades on site which meant free access to each floor of the building. Since there weren’t any internal walls at this point, loading out and moving equipment was also straighforward.George Barnsdale has provided customised timber windows and doors to some of the finest buildings in the UK. In central London alone, you are never far from one of our projects.

Project descriptionWhen it comes to retrofit and sensitive renovations, George Barnsdale timber windows and doors is recognised as one of the leading providers to commercial projects in the West End of London. The latest project in a conservation area of Covent Garden is no exception.Grainhouse is a high end office and retail conversion project undertaken by London based architects Barr Gazetas for their client Hines. A former seed merchant’s building dating back to the 1920s, the new Grade A workspace stitches together 5 separate historic buildings around a central atrium. In order to preserve the original character of the buildings, the project has retained and restored the original brick facades and plaster work. It has also benefitted from replacement historic style sash and tilt and turn windows.“The site has been extended by two storeys, with separate but interlinked extensions on each of the five buildings responding to the massing and historic fabric of each. This allows each building to retain its distinct identity externally, whilst creating a seamless internal floorplate.” Barr Gazetas.BREEAM Excellent and award winningA key objective for the building was to be as sustainable as possible achieving BREEAM Excellent. Hines, who are using part of the building as their head office, aim to be net zero by 2040 without buying offsets. One of the ways in which it achieves this on this project is through high performance windows designed, manufactured and installed by George Barnsdale.The project includes a range of spiral balance sash windows, box sash windows and tilt & turn windows. Finished in traffic white (RAL 9016) they are authentically traditional whilst incorporating high performance glazing designed to keep the building cool in summer and warm in winter and the unique sash seal.George Barnsdale’s spiral balance, box sash and tilt & turn timber windows for our Grainhouse project provided a high quality and low carbon thermal upgrade to the existing buildings while ensuring that both new & existing elements remained in keeping with the historic context of this sensitive conservation area. –Magnus Wills, Associate Barr GazetasThe project has been nominated for the BCO Awards and is also a finalist in the MIPIM Awards which celebrates the industry’s most “useful, sustainable and visionary projects.”Covent Garden in London is home to numerous historic buildings, a growing number of which now have George Barnsdale timber windows. Take a look at some of our other projects in the video below.

Project descriptionPart of the Kampus project to regenerate Manchester’s Canal Street and surrounding areas, the Minto & Turner Building, a former cotton warehouse, is a well known local landmark situated on the Rochdale canal in the centre of the city.A red brick grade II listedA red brick grade II listed warehouse building, it is an award winning scheme converted under the watchful eye of ShedKM Architects into trendy apartments by Mount Anvil on behalf of Capital & Centric and HBD.Insta paradiseThis Instagramers paradise has a real contemporary feel that manages to retain its past strong industrial heritage whilst making it suitable for today’s modern lifestyle. Inside is exposed brickwork and cast iron columns with large open plan cloister living areas providing dual aspect views through the black/grey timber casement windows. Outside, cast iron fire staircases and hoists have been restored and retained.Grey/black timber windows and doors with red cast iron staircaseThe building also features matching smaller square pivot windows and simple timber doors providing residents with great views and access to the street scene and canalside bars below.Having worked with George Barnsdale on its Nottingham Axis project, a conversion of the old co-operative building, Henry Boot Development was no stranger to the Lincolnshire joinery manufacturer, which is one of the oldest surviving family companies still manufacturing high performance timber fenestration in the UK. A mix of timber flush casement windows, pivot windows and timber doorsets were designed to incorporate high acoustic and thermal performance to ensure the perfect living conditions inside the building. Part of the aesthetic on the canal side elevation includes the use of louvres for privacy and to maintain the industrial feel.In addition to the manufacture of the bespoke timber windows, doors and louvres, George Barnsdale also provided ongoing site surveying and project management as well as full installation using detailed interface drawings to ensure the perfect fit, taking into account the wonky openings typical of a project like this.

Project descriptionThis 1930s Edwardian style home, originally purpose built to be a doctor’s surgery, has been transformed into a stunning contemporary property, pulling inspiration from the homeowners, and their love for New England style homes.This restored doctor’s surgery, now cosy family home, is in the Leckhampton area of Cheltenham. Nicknamed the heart of the Cotswolds, Cheltenham welcomes thousands of tourists every year. Cheltenham is a regency town well known for its many festivals (including the Cheltenham Racing Festival), the historic architecture, plus the town is home to many listed buildings.The owners have always wanted to do a big renovation project, but their previous Georgian home was both a listed building and in a conservation area, and so they were very restricted on what they could do. Once their children had flown the nest, they found this wonderful property and saw a great opportunity to remain in the centre of Cheltenham and take on the challenge.New England meets Old EnglandThe New England region of America is known for one of homeowner’s favourite styles of architecture. Their love for the location and style of houses, that are inspired by the early colonial period and Georgian architecture, was a key influence for them when designing their home. They wanted to bring an element of New England to Cheltenham, blending the modern and contemporary style of New England homes with some of the historic elements of the Georgian houses within the town.New England homes have a few standout features, some that the homeowners took inspiration from. When it comes to colour; soft and neutral shades such as whites, creams, and pale blues are common. In their home, they chose Traffic White (RAL 9016) windows with satin chrome hardware and chose various shades of blue, including Night Blue (RAL 5022), for the doors to compliment the windows throughout. In terms of materials used, natural is the way to go for New England homes, incorporating wooden products that are sustainable and naturally sourced. Similarly, the homeowners favoured the use of timber for their windows and doors, sourcing products locally and opposing the use of timber alternatives.Inspired by TimberUnlike many homes in Cheltenham, the homeowner’s property is not in a conservation area. This gave them much more flexibility when it came to refurbishing the home – in fact, it allowed them to strip the property down almost to the brick work, installing a new roof and changing the layout of the property to remove some of the many smaller rooms of the original doctor’s surgery layout. However, they did keep some of the property’s original features and took inspiration from the original style to pair with a modern New England inspired design, maintaining some of the key elements of the 1929 home, such as the high ceilings and parquet flooring. The homeowners chose a range of around 50 George Barnsdale’s products, including spiral balance sash windows with Georgian bars, flush casement windows, single and double entrance doors, stable doors, and bifolds.All these products were made using FSC ® certified Engineered Softwood timber frames and a combination of Grandis Hardwood and Engineered Softwood timber cills and sashes. Engineered Softwood is great for windows and doors requiring a paint finish. Engineered timber is also free of knots and imperfections, enhancing the aesthetics and preventing the risk of damage to the coatings in the long term, so this timber was the ideal choice for this home.The homeowners mentioned that they wanted large windows to take advantage of the beautiful views surrounding the house and so they could use some windows as seating areas. They liked the sash windows with bars and rails as they liked the functionality of them, the fact they were secure, and how they helped provide good ventilation.The spiral balance sash windows add a timeless appeal to the property, incorporating a traditional style to this contemporary renovation. Our spiral balance sash windows include our patented sash seals, so you get windows that not only look great, but also perform to the highest standards.The bifolds, situated in the main living area of the house, provide a clear opening and connection to the outside – the homeowners said that in the summer they open the bifolds out and take advantage of the indoor-outdoor space. Our timber bifolds have superior multipoint locking and are tested to PAS 24 and Secured by Design. With their concertina design, our timber bifolds allow the creation of a clear opening, whilst remaining secure.The single and double open entrance doors situated throughout the home in a stunning shade of blue to compliment the windows are paired with George Barnsdale’s modern collection of Stainless Steel hardware. The entrance doors are secure and durable and provide easy access to the outside of the house. We can’t help but notice how well they go with the soft colour of the exterior of the house too!The Perfect PartnerWhen choosing a supplier, the homeowners knew they wanted to work with local or UK based manufacturers and installers. From the start, they also knew they wanted to use timber, for the quality and durability it provides, despite other suppliers advising against it and stating they would not know the difference. After contacting a local window installer, QBD Ltd, the homeowners were introduced to George Barnsdale. They were pleased to know that locality was something they could achieve as QBD’s offices are located just around the corner from their home, meaning they could work closely with the installer to decide on the right products.The homeowners mentioned that being able to visit the George Barnsdale factory in Donington, Lincolnshire helped to solidify their decision on what products to choose for their home. Visiting the factory brought the products to life and allowed the homeowners to see that all our products are made on site, by our expert team. Visiting the factory also allowed them to chat to our expert team and get the answers they needed on specific product details to be fully confident in their decision.The homeowners mentioned that QBD were a great partner to work with. They were committed to the project and were very reliable and flexible to their requirements. The windows and doors were easy to install, and they could rely on QBD to get the job done.A ‘Remarkably Smooth’ ProcessThe whole project took two years to complete. The couple stated that throughout the entire project, they faced very few mistakes, as they had the luxury of time to get things right and go at their own pace.The entire process was remarkably smooth, especially the installation of the windows and doors. These products were a big investment, but we are so pleased with the outcome and glad we chose to work with QBD and George BarnsdaleHomeownerThe homeowners are very pleased with their timber windows and doors. The value of the windows and doors is apparent one year on as they are still in perfect condition. Overall, the entire installation process was simple, and they were able to coordinate effectively with the builders and QBD so that when the windows arrived, they could be installed quickly.As soon as the scaffolding and plastic sheeting was taken down and the project was taking shape, any early concerns or scepticism about what we were doing soon fell away and since then we’ve had nothing but positive feedback about the look of the whole project, and we get compliments on our windows all the time.HomeownerWhat was once a 1930s purpose-built doctors’ surgery is now a transformed modern home influenced by the homeowner’s love for New England. Every detail that has gone into this home has been intricately thought of to create their dream home.

Project descriptionFlorence Boot Hall is an historic 1920s accommodation block at the University of Nottingham that has undergone a £10.2m refurbishment by Clegg Construction to provide the highest levels of comfort and technology for students. With its historical links to Boots the Chemist, having been funded by Florence Boot, it was vital to retain the heritage of the building and this included replacing the uPVC windows with quality bespoke timber windows from George Barnsdale.Why replace uPVC windows?The existing uPVC windows were only 15-20 years old but were degrading, looking untidy and not meeting the thermal and acoustic performance levels required, nor were they respectful of the 1920s aesthetic."When you consider the original timber windows probably lasted 70/80 years and the uPVC ones barely 20 years, there really is no argument that plastic will outlast quality engineered timber any more."Steve Dixon, Director, George BarnsdaleFollowing discussions with the architect and client, George Barnsdale supplied and installed a sample wooden sliding sash window to demonstrate the level of performance and aesthetic quality of its fenestration products. Reassured that the products suited the needs of the project, a total of 380 new triple glazed FSC certified softwood timber windows with hardwood cills including spiral balance sash and flush casement windows were installed. There were also a number of french doors with arched fanlights in the common room area as well as flush outward opening entrance doors and fire escape doors elsewhere in the building. The team also supplied matching timber louvre doors for plant areas.Using George Barnsdale’s unique four stage paint process, the sliding sash windows were finished in pure white RAL 9010 with elegant ovolo astragal bars and polished brass hardware.Some of the casement windows fitted into the later 1970s extension are finished in a timeless grey brown RAL 8019 with original gold collection hardware. All windows throughout are glazed in triple glazing.What are the challenges of installing triple glazed timber windows into an old building?The depth of the window frames required to house high performance triple glazed deep section windows can create issues with the existing opening sizes which were originally designed for single glazed windows. George Barnsdale adapted their designs by using extended linings and adapting the sections to allow for this. By extending the external jamb linings, the spiral balance windows were made to more closely replicate traditional box sash windows typical of when the building was originally constructed.InstallationAs part of the company’s contract service, Ian Wright, George Barnsdale’s Commercial Project Manager was on site from the start of the project with the surveying team and on a weekly basis during installation. There was a delay at the start due to the discovery of asbestos which required removal by a specialist team and a safety report obtaining but once work got started, everything went smoothly."George Barnsdale has been an absolute pleasure to work with, Ian Wright’s professionalism is second to none."David Ross, Project Manager, Clegg ConstructionHow do you improve energy efficiency in an old building, other than timber windows?In order to help it achieve its target of a very good BREEAM rating and the University’s target to be carbon neutral by 2040, the team at Clegg Construction have implemented a raft of energy efficient measures in this fabric first refurbishment. This includes air source heat pumps, a building management system, LED lighting and new George Barnsdale triple glazed timber windows and doors. All of this has been achieved whilst respecting the building’s heritage. The building has since been nominated for an East Midlands Energy Efficiency award, with triple glazed windows being one of the main contributory factors.All in all, the project has been a great success and is ready for students to move into in September 2023."Your products are outstanding and I would definitely recommend George Barnsdale."David Ross, Project Manager, Clegg Construction

Project descriptionGloucester Quays, known to shoppers and restaurant goers alike is one of the largest mixed-use regeneration developments in the UK. Back in 2008, George Barnsdale was appointed to install 200 high-specification timber windows and doors as part of the visionary scheme. 17 years later, we reminisce on this preservation project and revisit to find that the very large and very beautiful windows remain, to this day, as good as new. Gloucester Quays, a 60-acre, £150 million development comprising of a designer outlet, leisure facilities, supermarkets, bars and restaurants, is one of the largest mixed-use regeneration developments in the UK. In May 2007, unwanted buildings from the original Gloucester Quays site were demolished, with a former factory left intact, which was renovated into part of the outlet centre. Construction of the new development began in October 2007, with a vision to create a multi-purpose development that provided a range of amenities.  In 2008, George Barnsdale became involved in the project, working with Bovis Lendlease to manufacture 200 very large, high specification timber windows and doors, measuring as high as 5 metres. George Barnsdale completed the installation of the windows and doors in 2009. For this project, period detailing was key and producing windows and doors that matched the original products, and complemented the period and style of the building was something George Barnsdale were keen to help achieve. To meet these requirements, factors including ornate timber frames and light panels that ensured a perfect match between the existing and new windows and doors were a key consideration.  The client wanted the colourful heritage of the Quays to be preserved and enhanced, whilst blending in with the contemporary design of the newer buildings, which is something the timber windows and doors complemented perfectly. Gloucester Quays: 17 years new17 years later, Gloucester Quays is now an imaginative and visionary scheme aimed at providing an attractive environment for residents and a major destination for shoppers and tourists in Gloucestershire.  We love to revisit our past projects and upon revisiting the Quays 17 years on, it is great to see that the windows and doors, despite the specific requirements of the project, had stood the test of time. Though some of the windows and doors could benefit from a little clean, their functionality and design have remained in great condition.After 17 years, the quality of the products is evident, with the condition of the timber and the paint still intact, despite factors that could affect them over time, such as weather conditions, general footfall of the public that may cause damage, or frequent usage of the products. When we take a closer look at the condition of the windows, we can see that even though they could do with a clean, the paint finish is almost perfect. The type of coating used on timber products and how it is applied can significantly impact their longevity. To avoid constant paint retouching, we apply a 4-stage paint process which provides maximum protection to the timber, whilst allowing it to breathe and ultimately last longer. Good timber window and door design can also impact the product’s longevity. Because the specification for this project was quite bespoke, with varying window heights and period detailing to consider, not only the appearance, but the performance of such large and unique windows and doors had to be considered at each stage to ensure they remained compliant and in keeping with the client’s requirements.  At George Barnsdale, we understand how important it is to consider all possible design restraints at the early stages of a project. That’s why we work closely with our clients throughout the project to anticipate any problems before they arise to avoid issues further down the line.“I was pleased to see how well our windows and doors have performed over the years. The specific requirements for this job meant we had to consider a range of factors at the early stages of manufacture. But, to see them 17 years later in almost perfect condition is a testament to just how well our timber windows and doors perform.” Hayden Darley, Technical Director at George BarnsdaleTo see our timber windows and doors in such good condition, even after 17 years, showcases just how well our products can perform. Whether you’re looking for replacement windows on your listed home or a commercial replacement project in a bustling city, we can help you achieve your project specification, no matter the requirements.  

BREEAM award nominated Number One Queen Anne’s Gate is a prestigious development of 27 luxury private apartments situated adjacent to St James’s Park in London. The development is aimed at those who enjoy the finer things in life like a full time concierge service, onsite gym and a private screening room, the development offers residents the epitome of luxury living.Dating from around 1704, the building is Grade II listed and retains the external Georgian facade which is so typical of this area. The building was demolished behind the retained facade to allow modern state of the art development whilst retaining the historic significance and charm of the building. George Barnsdale’s experience of working with different types of retained facades and steel framed systems was invaluable in managing the fenestration for this project.When it came to the choice of windows, the planners specified sympathetic like for like replacement with single glazing in the oldest parts of the building. George Barnsdale supplied and fitted a range of bespoke historic timber box sash windows and flush casement windows with single and double glazing and putty glazing beading. Grandis hardwood doorsets were recreated and installed to complement the existing refurbished door sets. These incorporated the patterns of the original astragal bars.The sash profile on this project is more decorative and intricate than normal and required us designing and manufacturing new tooling for this project. Now offered as part of our standard options, this is called the ‘Queen Anne Profile’Hayden Darley, Technical Director, George BarnsdaleIn order to ensure clients enjoy complete quiet, acoustic laminated glass was incorporated into the design. Alongside this was George Barnsdale’s patented sash seal which ensures that drafts and noise are prevented from entering through the frame as is the case with original sash windows. Our sash windows consistently outperform others in acoustic and air tests. Having achieved an “Excellent” rating for energy efficiency at the post construction stage, the hard work undertaken to deliver a high end historically sensitive development that is also energy efficient is something we are very proud to have played our part in.To view more of our London portfolio and other projects from around the UK visit our case studies section and see why we are frequently being selected for major conservation projects.

Project descriptionWhen it comes to views from your window, they don’t come much more prestigious than No 1 Palace Street which affords residents stunning views over the gardens of Buckingham Palace from the front of the historic listed building. With this in mind, arguably, the fenestration on this project is one of the most important elements of the development as well as one of the more complex; taking into consideration the requirement to retain the façade of the building. Retained facades and the design installation of the windows for them is not a straightforward mix and each project we come across throws up different challenges. A fusion of styles spanning Italian Renaissance, Queen Anne, Beaux Arts and today’s 21st century contemporary design and build requirements, the seamless blending of old with new at No 1 Palace Street is something George Barnsdale is increasingly becoming known for. Having worked with developer Northacre Plc on one of their other prestigious projects, The Lancasters,  which was also a listed building with a retained façade, George Barnsdale was delighted to be entrusted with manufacturing and installing the windows and doors for the latest exclusive development beside the most famous of Royal Palaces.Complex projectWorking with the contractor Balfour Beatty, George Barnsdale supplied and installed 282 timber windows and 181 timber doors over a lengthy and complex project which has seen changes in contractor and architect personnel along the way.From the early stages of the project, it was evident that it would be complicated with five different buildings on the site and lots of variations in glazing types throughout which tested the depth of the team’s acoustic knowledge to the full. Led by Stephen Wright, the Barnsdale team attended numerous design meetings to overcome the challenges of the project including the design of highly bespoke doors with a high level of tested acoustic, thermal and weather performance. Commenting on the project Stephen said: “We are usually able to avoid the need for additional performance testing since we have so much of our own data already, but in the case of the doors on this project we did have to to do additional testing to guarantee performance since they are unlike anything else we have manufactured.”During the planning meetings as the project progressed multiple discussions took place between the architect and the Barnsdale team to agree the best way to deliver the design intent whilst balancing the function and performance of the products. As with any projects, there is often a conflict between the architect’s vision and the practical delivery, but we worked hard to achieve the best of both.As the plans and technical specifications developed, the surveying team spent a lot of time on site measuring the old openings which were anything but standard and taking this back to the technical team to incorporate into the designs as well as the comprehensive installation details. Commenting on the project, Vic Polydore, Technical Engineer said “There are probably only four different item types but the variations in openings meant that, even if the design was agreed and confirmed, the interface details were completely different in most areas. An example of this was the first drawing that were submitted for Buckingham Gate external façade which consisted of four individual drawings. When it came to adding the ‘real life’ wall interfaces, we would have had to increase to about 10 drawings and that is for just one façade. Instead we have a simplified process that includes ‘type drawing’, interface details and schedule, which when read together makes things much more straight forward.”Conservation and high performanceThe windows themselves are a mix of around 270 Historic sliding sash windows, 10 dormer windows (3 of which are curved in plan), 2 pivot windows, 179 inward opening tilt and turn doorsets. Those windows at the front of the building had to be single glazed to meet the requirements set out by the Conservation Officer, whilst retaining high performance levels.On site, one of the biggest challenges for the Site Manager, Ian Wright, was how to manually handle the windows and doors. Commenting on this, Ian said: “Usually we would use floor cranes but it wasn’t possible due to the uneven floors and the steel beams in the ceilings so we had to improvise and find ways to lift them manually.”A further complexity came with the level of refurbishment work being carried out on the stonework by Paye Stone and Restoration which we had to work around, making our own schedule extremely challenging at times. Ian continues: “Some days we only managed to get five windows in on one floor, missed some out and had to move elsewhere which isn’t the most efficient way to schedule a job, however this is often the nature of working on historic projects like this.”In addition to this, arranging delivery and cranes to be available in such tight spaces outside is typical of historic projects like this. Having a single supplier for timber windows and doors proved beneficial to Balfour Beatty in terms of reducing the hassle of managing multiple suppliers, the financial aspects, on-site issues and the design elements. In the past, windows and doors have been bundled into a broader joinery package, but since these joinery companies lack the technical knowledge to deliver fenestration on projects like this, they would use subcontractors which keeps the people with the expertise away from the design and decision making processes. Tom Wright, MD at George Barnsdale said: “The fact that we were able to be involved in the design and planning meetings meant we could spot in advance any potential issues, point them out and come to an agreement on how to mitigate them.”This is the optimal way for us to work on complex commercial projects like this, the earlier we are involved, the better the outcome.”A further plus for Balfour Beatty was the financial stability of George Barnsdale because contractors can find themselves in situations where they have to prop up suppliers when finances become troublesome. Our approach to sustainable business planning and finance is often seen as beneficial to customers on lengthy commercial projects such as this one.Overall George Barnsdale’s competence and ability to lead a project like this is very important. From measuring and designing windows for openings that are old and often all over the place, to changes in personnel resulting in potential miscommunication, it is down to the excellent project leadership, experienced design oversight and comprehensive record keeping of the team members that any glitches were overcome.

Project descriptionWhen it comes to redevelopment projects, they don’t come much more complex than No1 Grosvenor Square with its rebuilt facade, SFS (steel framed structure) on springs and its listed building status.No 1 Grosvenor Square is a building of significant historical importance located in the heart of Mayfair and formerly home to the US Embassy and the Canadian High Commission. Its precise replica of the Oval Office, created by Ambassador Joseph P Kennedy in 1938, is said to have inspired his children to want to achieve the dizzying heights of US President.Located in the heart of the Duke of Westminster’s Grosvenor Estate the building was bought by Lodha in 2013 and has been subject to extensive renovation works ever since resulting in the impressive development of high end luxury apartments complete with acoustic windows it is today.Tom Wright, Managing Director at George Barnsdale was involved from the earliest stages of the project to oversee the design, testing, manufacture and installation of some of the very highest performing historic windows in London. Here he describes some of the challenges the project presented to the Barnsdale team and how they overcame them…How did it all begin?“We initially worked with Rupert Willard from Eric Parry Architects prior to the main contractor, Mace’s appointment in 2016. Following the work we did on the 20 Grosvenor Square project which was a similar historic renovation with a retained facade, the client recognised our experience and knowledge of the requirements of the Grosvenor estate. It was clear from the beginning that the client really wanted to respect the history of the building, retaining the beautiful Georgian aesthetic but also wanted us to find a way to give clients the warmest, quietest and most secure timber windows possible.”“Fortunately, given the complexity of this project the architect and client had the foresight to involve us at the earliest opportunity. We provided a detailed programme through the tender stage to ensure that the contractor understood the critical timeframes and could make decisions at the right time. As time went on, such collaboration with architects, facade consultants, acoustic engineers, conservation specialists and quantity surveyors etc proved invaluable to the process of overcoming issues as soon as they arose and helped with the smooth running of the project.”Due to the nature of the project where an apartment has recently sold for £140million, residents could not be expected to put up with unwanted noise. One of the sources was the nearby underground trains that rumble and resonate through the old buildings in the area. The solution was a very complex internal rebuild involving the entire interior of the building being reconstructed on springs. Tom continues: “Whilst the SFS was designed to move, the external walls of the building remained static so the technical challenge of installing windows in this scenario where there was marked differential movement was considerable. We worked closely with Illbruck, to develop an interface that would work with their SFS facade detail taking into account waterproofing, acoustic and weather performance.”Hayden Darley, Technical Director explains further “The external face of the building is not flat it features brick and stone work that steps in and out, the sequence of works meant that windows were installed into the build long before the external face was built meaning items were effectively located in mid-air and positioned in the correct place with the use of gridlines e.g. W1 is positioned 300mm in front of gridline A, but W2 might have only been 150mm from gridline A. this meant that we had nearly 70 interface drawings showing how all the windows were to be installed.”In line with many projects, George Barsndale was provided with a detailed glazing analysis that considered the location, elevation, window type, window covering (curtain/blinds, including colour, distance and material) and heating method. This defined the requirement for heat strengthening and allowed it to be specified only where required which helped manage the budget. The heat strengthened glazing specification was highly specialist.Acoustic challengeGoing back to the acoustic challenge, the windows were specified to meet the octave specific noise reduction and the whole window was validated with test data not just the glazing data. The latter is not a reliable method of determining acoustic performance. Tom continues “Using a vast array of technical and acoustic data collected over many years of testing, we were able to specify the optimal solution. We always advise clients to request whole window data because as soon as glazing is put into a frame, the performance is affected. We take into account the entire design of the window and the installation detail to ensure the highest performance.”Security is another important consideration in high end developments such as One Grosvenor Square and George Barnsdale integrated security contacts into the design and fitted custom handles to the doors.Commenting on the main challenges of the project, Hayden Darley, Technical Director said: “The weight of the windows was a bit of an issue since the glass was so heavy, there was also quite a lot of effort put into the supply chain for the glazing and the overall difficulties of installing the windows before the external envelope was completed.”

Project descriptionGeorge Barnsdale undertook a three year project supplying and installing 800 timber windows and doors for one of the most exclusive residential developments in Central London – The Lancasters.The majority of the 77 properties face south with views onto, or across, Hyde Park. Each home has been designed around the grandeur of the original architecture and interior features of the building, such as high ceilings, ornate cornicing and fireplaces.Grade II listed and made up of 15 stucco-fronted houses dating back to the 18th century, this large scale development presented some interesting challenges. We manufactured a range of traditional timber box and tilt & slide sliding sash windows, inward opening doors and sliding doors, all made to measure and finished with our high quality white paint finish. We liaised with architects to design timber doors and windows that would complement the period and French Renaissance style of the building.The project’s architects specified FSC “chain of custody” timber and as The Lancasters is a listed development we had to seriously consider the aesthetics of the wood as well as its performance, stability and natural durability.The door frames and windows were manufactured from Redwood WoodHeart®, an x-ray selected engineered timber. It is a similar species to the original timber used by the Victorians.We decided to use engineered Red Grandis Hardwood for the production of the doors as it is FSC “chain of custody” and has received third party testing by TRADA Technology Ltd, where it achieved great results for natural durability and resistance to fungi, which is very important for long term performance.From an aesthetics point of view, we needed something that would look sympathetic to The Lancasters heritage. Red Grandis is a high quality, flawless, uniform timber that lends itself well to a variety of styles and shades and its consistent colour means wood stain can be applied to achieve the desired effect.

Project descriptionOver 20 years ago in July of 2001, plans came to fruition as work began on the Channel Tunnel Rail Link and the restoration and extension of St Pancras Station. What followed was a large redevelopment of  the Kings Cross area. The regeneration of the surrounding buildings became a catalyst for further development and in changing the overall perception of Kings Cross.   It was in 2001 when the first area to begin development was the Regents Quarter. This is when George Barnsdale entered the scene, installing approximately 350 sliding sash windows and 40 doors to remain in keeping with the history of the area.   Now 18 years later, the outstanding quality of George Barnsdale’s products is evident in how well the windows and doors have stood the test of time. Though some are in need of a good clean, it is evident to see that the timber and the paint finish is still perfectly intact despite no recoating having taken place in that time.  ‘’They have very good thermal and acoustic performance even by today’s standards, with exceptional coating performance. We don’t know of any glazing unit failures. In the late 90’s we developed a drained and vented glazing system which allows the double-glazed units to perform very well.’’ Commented Stephen Wright, George Barnsdale. “They have very good thermal and acoustic performance even by today’s standards, with exceptional coating performance. We don’t know of any glazing unit failures. In the late 90’s we developed a drained and vented glazing system which allows the double-glazed units to perform very well.”Stephen Wright, George BarnsdaleExceptional long-term performance doesn’t only rely on our 4 coat painting process but with good design and paying particular attention to all the smaller details that enhance the life of the coating One of the main reasons the products are performing so well after such a prolonged period is the paint process which is an advanced four stage coating system. Superior to most companies’ three stage process, the Barnsdale process provides extra protection to the timber and a superior finish.   While our previous case study with the Lincolnshire Gatehouse showing us that George Barnsdale Timber Windows and Doors can look as good as new 10 years after installation in a rural countryside setting, Kings Cross also demonstrates how well George Barnsdale products can look after 18 years in a bustling capital city. 

Project descriptionEighty Grosvenor Street is set in the heart of the art district in London’s prestigious Mayfair not far from Bond Street. Developed by Frelene Ltd, it is an excellent example of how an existing historic building can be reimagined for modern use. Behind the traditional facade and timber windows, sits a contemporary structure that belies the age of the original buildings on the site.Originally three individual period townhouses, the building has been transformed into a single, mixed use structure spanning five upper storeys complete with private terraces on the 4th and 5th floors. The new steel frame structure (SFS) has been created to overcome the challenges of delivering modern day open plan spaces flooded with light in a traditional historic building. The use of reclaimed suffolk white brickwork and sensitive replacement timber windows to the front ensure the building remains in keeping with the Georgian aesthetic of the street.Working with Orms Architects, Kier Construction set out to retain part of the original facade at the front of the building as per planning. Due to our extensive experience working on retained facade projects, George Barnsdale was appointed to manufacture and install the timber windows to the front of the building where the Georgian aesthetic needed to be retained. George Barnsdale invested a great deal of time at tender stage to ensure the designs met the requirements of the Grosvenor Estates team. Having worked on a number of properties in the area, the company’s experience and knowledge proved invaluable to the design process.Steve Dixon provided excellent tender/design advice prior to Barnsdale being awarded the contract. This really helped the designers meet the Grosvenor Estates specification.”Conor O’Keeffe, Project Manager, KierThe window specification stated timber tilt and turn windows and Juliet Balcony windows to match the originals as far as possible. Stephen Wright, Director at George Barnsdale had a number of early concept design meetings and discussions with the architects and contractor in order to meet the design brief alongside the thermal, solar and acoustic performance requirements.In the design process we were looking to achieve a bespoke framing element to make sure that we captured the existing window profiles which were originally on the retained facade. Barnsdale were very accommodating and assisted to make sure that we achieved the retained facade replication.Kathryn Knowles, Architect, OrmsBack onsite in Lincolnshire, the concept sketches were handed over to the Technical Director Hayden Darley to develop the designs and drawings in detail. In order to meet the project’s requirements, Hayden had to adjust the designs to ensure an overall frame thickness of 128mm which is not part of George Barnsdale’s standard range.Explaining the process, Hayden said “Essentially we took one of our standard frame profiles as a base and then designed two versions of decorative frame add on. This enabled us to use our existing robust tested performance data to ensure the windows met all the technical requirements whilst incorporating a sympathetic bespoke design, a win win!”A simple pencil round profile was used on the majority of the items and a more ornate profile was used on the two arched openings to replicate the originals. High-performance acoustic and solar glazing was used throughout to ensure an optimal internal environment for tenants/residents.The windows are elegant and contextually sit well within the retained facade. They look as per the vision we had for the building.Kathryn Knowles, Architect at ormsThe timber windows that were due to be installed into the new structure were straight forward and went into manufacture using the schedule sizes. However, the largest of the retained openings caused a few issues because the size of the opening was changed post survey.Commenting on this Ian Wright, Installations Manager said “The site measure was completed as soon as access became available, the designs and drawings were signed off and the windows went into production. However, it became apparent that the height of the opening was due to be increased by around 1 metre. This meant the window we had in production would be too small. This caused delays in the project, which was frustrating for everyone.”Having made the timber windows to fit into the existing openings, once work began on the repair of the facade, it became clear that the structure wasn’t in any state to be kept and the entire retained part of the building was knocked down and built as new.I would recommend George Barnsdale, overall the windows look fantastic. There were some frustrations along the way, but you never walked away or gave up.Conor O’Keeffe, Project Manager, Kier