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Bauderflex Roof System Reinforced Bitumen Membrane Inverted Roof Covering System Self-Adhered (with Torch-on Capping Sheet)

Verified by manufacturer 10 days ago

Bauder Ltd Third party certifications:
  • EPD

    EPD

    Certificate type

  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

  • CCPI System

    CCPI System

    Certificate type

Two-layer, torch-applied, inverted roof, bitumen inverted roof system, incorporating inverted insulation and torch-on bitumen capping sheet, with self-adhered bitumen underlayer.

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Application

Suitable for both new build and refurbishment applications, with option of using a root-resistant capping sheet for green roof scenarios.

Description

Bitumen inverted roof system, incorporating inverted insulation and torch-on bitumen capping sheet, with self-adhered bitumen underlayer. Bauderflex Roof System is suitable for a variety of applications on both new build and refurbishment projects and can be used in warm, cold and inverted roof scenarios. Includes the option of using a root resistant cap sheet, making this waterproofing system suitable for green roof situations. For green roof situations, see Bauderflex Green.

 

Bauder Inverted Roof systems should be ballasted/ landscaped to prevent wind uplift and/ or floatation. Type, thickness, weight of landscaping should be agreed with manufacturer per bespoke project basis.


Plus Points:

  • 4.2 mm SBS-modified elastomeric bitumen cap sheet with polyester fleece reinforcement.
  • Range of guarantee packages to fulfil cover requirements for project (dependant of system/product selection). For more information contact Bauder's technical department for a sample guarantee outlining cover level, terms and conditions.
  • Standards: BS EN 13707 Reinforced Bitumen Membrane Sheets for Roof Waterproofing.


Assessments and verifications:

  • CCPI Assessment 0007700012/1025: This systems CCPI mark provides accuracy of data delivering assurance to specifiers.
  • BBA certificate 10/4744.
  • Fire properties – membranes deemed “unrestricted” in certain circumstances as categorised in the BBA certificate.
  • Service life >30 years as stated in BBA certificate.
  • EPD certification on system components:
  • Bitumen membranes.


Flame-Free/ Safe to Torch Zone Detailing:

Bauder was the first manufacturer to pledge its support to the Safe2Torch initiative, introduced by the National Federation of Roof Contractors (NRFC) in July 2017. The flame-free detailing designs specifically deliver secure and safe installations in the vicinity of combustible construction materials located on, or connected to, the roof such as timber substrates or upstands; abutments to cladding, roof tiles, slates or thatch; or debris such as dry leaf material that is at risk from ignition.

 

Flame-free detailing can be integrated into all bituminous waterproofing solutions to give versatile, safe installation techniques for all roof types, site conditions and budgets.

The waterproofing flashing should be turned up by at least 150 mm around features such as rooflights, parapets and service pipes passing through the roof, detail work to upstands, edge details, flashings, etc. The membrane should not be taken up in one piece. Consult manufacturer for further information.

 

Features and benefits of Flame-Free/ Safe to Torch Zone Detailing:

  • Complete range of self-adhesive bitumen membranes.
  • Installation follows industry best practice and conforms to BS 8217: 2005.
  • 4.2 mm-thick elastomeric KSO SN and KSO P-SN cap sheets.
  • Hot air welding of membrane laps in the flame-free zone.
  • Can comply with Building Regulations Approved Document B – Fire Safety.
  • Manufactured to BS EN 13707: 2004 Reinforced Bitumen Membrane Sheets.
  • Reduces risk of fire caused by installation.
  • Practical solution so that installation programme times are achievable.
  • Robust waterproofing without compromising system longevity.

General information

Color

Brown

Grey

Finish

Mineral

Material

Bitumen

Shape

Rectangle

Length

Bespoke

Width

Bespoke

Warranty description

-

Manufacturer guidance

Guarantee options could include ‘Product’, ‘Product and Workmanship’ and ‘Product, Workmanship and Design’ guarantees.

All guarantees available for this system are subject to the works being carried out in accordance with the Bauder specification and being installed by a Bauder Approved installer.

For full details and further information regarding guarantees and alternative systems, consult manufacturer.

Uniclass

Ss_30_40_30_71 Reinforced bitumen membrane inverted roof covering systemsPrimary

CAWS

J41/10 Reinforced bitumen membrane warm deck roof covering

J41/110 Built-up reinforced bitumen membrane warm deck roof covering

J41/120 Built-up reinforced bitumen membrane inverted roof covering

J41/130 Built-up reinforced bitumen membrane cold deck roof covering

Product range

Built-Up Bituminous Systems

Specification data - Reinforced bitumen membrane inverted roof covering systems

Preparation

-

Horizontal work

Activator-Primer (Canister) APR01 - Black.

Guidance for specification option:

Synthetic rubber resin-based primer, developed to provide the necessary preparation of substrates prior to the installation of self-adhesive and torch-applied membranes. The spray application offers improved film thickness speed of application (by up to 50% over roller applied products) and quick drying in a matter of minutes.

  • Coverage: approximately 96 g/m² (300 mm-wide spray one coat, 192 g/m² two coats). Two coats may be required for very porous substrates.
  • Application temperature: +5 to +30°C.
  • Drying time (at 10°C): 5–10 minutes.
  • Colour: black.
  • Recoat time if left exposed: four hours.
  • Suitable substrates: oriented strand board (OSB); plywood; timber; concrete; lightweight concrete or cementitious materials; metal; Bauder self-adhesive underlayers; existing asphalt and bitumen membranes; polyisocyanurate (PIR) insulation.
  • Non-suitable substrates: mica-finished surfaces (e.g. KSD FBS); laminated paper-foil faced insulation; expanded polystyrene (EPS) or extruded polystyrene (XPS) insulations; BauderROCK or mineral wool insulation; BauderGLAS or cellular glass insulation; copper; thermoplastic waterproofing membranes.

SA Bonding Primer.

Guidance for specification option:

For Self-Adhesive membranes to Concrete and Screeded Substrates.

Synthetic rubber-based primer, specially formulated to increase the bond strength of Bauder self-adhesive bitumen membranes to a wide range of substrates, including timber, concrete, brick, metal and most plastics.

  • Coverage: approximately 200–300 g/m² (depending on substrate porosity).
  • Application temperature: +5 to +30°C.
  • Drying time: approximately 30 minutes, dependent upon ambient temperature and material porosity.
  • Colour: black.
  • Recoat time if left exposed: four hours.
  • Suitable substrates: timber, concrete, brick, metal and most plastics.

Manufacturer guidance

Contact manufacturer to confirm substrate suitability, if required.

Skirtings and vertical work

As 'Horizontal work'.

Waterproof covering

-

First layer

-

Type

BauderTEC Sprint DUO.

Guidance for specification option:

Elastomer bitumen self-adhesive underlayer with variable technology for lap sealing. The two side laps of the membrane have differing finishes. On one lap there is a self-adhesive finish, whist the opposite lap has a glass fleece. This allows the membrane to be sealed with either a gas torch or hot air welder.

  • Width: 1 m.
  • Length: 15 m.
  • Thickness: 2 mm.
  • Weight: 2.5 kg/m².
  • Surface, top: foil; bottom: peel-off release film covering self-adhesive bitumen.
  • Reinforcement: 120 g/m² glass fleece.
  • Cold bending test: -30°C.
  • Softening point: >100°C.
  • Tensile strength: length >1000 N/50 mm; transverse >1000 N/50 mm.
  • Elongation at break: length >2%; transverse >2%.

Attachment

Self-adhered.

Top layer

-

Type

Bauder PYE PV 200 S4.

Guidance for specification option:

Torch-applied, elastomeric bitumen, mica-finished capping sheet, 4.2 mm-thick. Features a spun-bound polyester reinforcement to allow the finished product to cope with structural movement without fracture. Its mica finish means that it has no integrated UV protection, therefore is only suitable for applications where it will be covered with hard landscaping, such as pavers or promenade tiles.

  • Width: 1 m.
  • Length: 10 m.
  • Thickness: 4.2 mm.
  • Weight: 5 kg/m².
  • Surface, top: mica; bottom: thermofusible polyethylene.
  • Reinforcement: 250 g/m² recycled, spun-bound polyester.
  • Cold bending test: -25°C.
  • Softening point: >100°C.
  • Tensile strength: length >800 N/50mm; transverse >800 N/50mm.
  • Elongation at break: length >35%; transverse >35%.

BauderFLEX K4E, Brown.

Guidance for specification option:

Elastomer bitumen torch-on capping sheet. The product features a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture, and a mineral finish to provide protection against UV degradation. Product has been fire tested as part of a system assembly and this information can be obtained in the Fire Test Report available from Bauder Ltd.

  • Width: 1 m.
  • Length: 7.5 m.
  • Thickness: 4.2 mm.
  • Weight: 5 kg/m².
  • Surface, top: mineral chippings.
  • Reinforcement: 250 g/m² spun-bound polyester.
  • Cold bending test: -30°C.
  • Softening point: >110°C.
  • Tensile strength: length >800 N/50mm; transverse >800 N/50mm.
  • Elongation at break: length >40%; transverse >40%.

BauderFLEX K4E, Charcoal Grey.

Guidance for specification option:

Elastomer bitumen torch-on capping sheet. The product features a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture, and a mineral finish to provide protection against UV degradation. Product has been fire tested as part of a system assembly and this information can be obtained in the Fire Test Report available from Bauder Ltd.

  • Width: 1 m.
  • Length: 7.5 m.
  • Thickness: 4.2 mm.
  • Weight: 5.5 kg/m².
  • Surface, top: mineral chippings.
  • Reinforcement: 250 g/m² spun-bound polyester.
  • Cold bending test: -30°C.
  • Softening point: >110°C.
  • Tensile strength: length >800 N/50mm; transverse >800 N/50mm.
  • Elongation at break: length >40%; transverse >40%.

BauderFLEX K4E, Grey Slate.

Guidance for specification option:

Elastomer bitumen torch-on capping sheet. The product features a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture, and a mineral finish to provide protection against UV degradation. Product has been fire tested as part of a system assembly and this information can be obtained in the Fire Test Report available from Bauder Ltd.

  • Width: 1 m.
  • Length: 7.5 m.
  • Thickness: 4.2 mm.
  • Weight: 5 kg/m².
  • Surface, top: mineral chippings.
  • Reinforcement: 250 g/m² spun-bound polyester.
  • Cold bending test: -30°C.
  • Softening point: >110°C.
  • Tensile strength: length >800 N/50mm; transverse >800 N/50mm.
  • Elongation at break: length >40%; transverse >40%.

Manufacturer guidance

Not for use with green roof systems.

Attachment

Torch applied.

Detail work

-

Flashings

Bauder GRP Trim.

Guidance for specification option:

GRP roof edge trim for use with Bauder bituminous roof systems. Available colours of either grey or black and a choice of profiles to suit the requirements of most projects.

Bauder GRP Water Check Trim.

Guidance for specification option:

GRP water check trim to be used on parapets and perimeter kerbs wider than 200 mm – must not be used on its own as a check kerb. Available in black only.

Bauder Aluminium Termination Bar.

Guidance for specification option:

Natural finish aluminium alternative to a lead counterflashing for use at upstand details to give protection to the top edge of the waterproofing. It should be restricted to use on upstands where a chase cannot be cut into the wall.

Bauder GRP Termination Bar.

Guidance for specification option:

Black glass-reinforced plastic (GRP) alternative to a lead counterflashing for use at upstand details to give protection to the top edge of the waterproofing. It should be restricted to use on upstands where a chase cannot be cut into the wall.

Skirtings and upstands

Not required.

Bauder LiquiFIBRE Detailing Kit.

Guidance for specification option:

Fast-curing waterproofing resin, containing fibre reinforcement that can be used for detailing awkward shapes or inaccessible areas where using LiquiDETAIL is impractical. PMMA-based resin that requires a catalyst and is solvent-free, isocyanate-free and halogen-free.

Bauder LiquiDETAIL.

Guidance for specification option:

Cold liquid-applied fast-curing waterproofing resin that can be used on upstands and details. PMMA-based resin that requires the addition of catalyst to trigger curing and is solvent-free, isocyanate-free and halogen-free.

Welted drips

Required.

Guidance for specification option:

Insert requirements.

Not required.

Cover strips

Required.

Guidance for specification option:

Insert requirements.

Not required.

Ancillary items

Required.

Guidance for specification option:

Insert requirements.

Not required.

Insulation

-

Type

Bauder JFRI PREMIUM+ Inverted Insulation.

Guidance for specification option:

Insert required thickness, 85–240 mm in 5 mm increments.

 

Designed specifically for inverted roof applications.

  • Type: rigid expanded polystyrene (EPS) insulation boards.
  • Facing: unfaced.
  • Colour: grey.
  • Nominal weight: 30 kg/m³.
  • Standard board size: 1215 x 1215 mm (including 15 mm rebate).
  • Thermal conductivity: declared 0.031 W/m·K; design 0.031 W/m·K (may vary, dependent on thickness specified).
  • Design load compressive strength: 0.20 N/mm² with 10% nominal compression.
  • Recyclability: 100%.


Consult manufacturer's literature for further details.

Bauder JFRI PREMIUM (300) Inverted Insulation.

Guidance for specification option:

Insert required thickness, 90–240 mm in 5 mm increments.

 

Designed specifically for inverted roof applications.

  • Type: rigid expanded polystyrene (EPS) insulation boards.
  • Facing: unfaced.
  • Colour: white.
  • Weight: 40 kg/m³.
  • Standard board size: 1215 x 1215 mm (including 15 mm rebate).
  • Thermal conductivity: declared 0.033 W/m·K; design 0.033–0.035 W/m·K (may vary, dependent on thickness specified and application).
  • Design load compressive strength: 0.30 N/mm² with 10% nominal compression.
  • Recyclability: 100%.


Consult manufacturer's literature for further details.

Bauder XPS (300) Inverted Flatboard.

Guidance for specification option:

Insert required thickness.

  • Type: rigid extruded polystyrene insulation boards.
  • Facing: smooth, self-finished.
  • Density: 30 kg/m³.
  • Standard board size: 1250 x 600 mm.
  • Board thickness: 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 100 mm, 120 mm, 140 mm.
  • Thermal conductivity: 30 mm: 0.034 W/m·K; 40–50 mm: 0.035 W/m·K; >50 mm: 0.036 W/m·K.
  • Compressive strength: 0.30 N/mm².

Bauder XPS (500) Inverted Flatboard.

Guidance for specification option:

Insert required thickness.

  • Type: rigid extruded polystyrene insulation boards.
  • Facing: smooth, self-finished.
  • Density: 35 kg/m³.
  • Standard board size: 1250 x 600 mm.
  • Board thickness: 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 100 mm, 120 mm, 140 mm.
  • Thermal conductivity: 40–60 mm: 0.034 W/m·K; >60 mm: 0.036 W/m·K.
  • Compressive strength: 0.50 N/mm².

BauderGLAS Inverted Insulation Flatboard.

Guidance for specification option:

Insert required thickness.

  • Type: cellular glass with pre-applied inorganic coating on the topside. Both the core material and the coating have an A1 reaction to fire classification and are therefore non-combustible. Where more than 1 layer of insulation is required, BauderGLAS Slab T3+ will be used as the base layer.
  • Facing: pre-applied inorganic coating.
  • Density: 100 kg/m².
  • Standard board size: 600 x 450 mm.
  • Board thickness: 100 mm, 120 mm, 140 mm, 160 mm, 180 mm, 200 mm.
  • Thermal conductivity: 0.043 W/m·K.
  • Compressive strength: 0.4 N/mm².

Attachment

Loose laid (and suitably ballasted).

Guidance for specification option:

  • Setting out: loose lay insulation directly over the capping sheet to brick pattern with staggered joints. Minimize cutting and avoid small pieces at perimeters and penetrations. Dependent upon the total thickness required, it may be necessary to construct the insulation using two layers of board. The manufacturer/supplier can advise on the available combination options.
  • Joints: butt together.
  • Loading over inverted insulation (minimum): ballast (landscaping) should be installed onto the Bauder WFRL Membrane (Water Flow Reducing Layer) to a minimum depth required to achieve a permanent minimum 80 kg/m² and load which prevents wind uplift and flotation of the insulation in high winds and/or heavy rainfall.
  • Additional loading at perimeters: on high buildings in more exposed areas, wind uplift may be a problem and in these instances paving slab ballast must be considered. Paving slabs should be a minimum of 50 mm thick. The slabs should be laid on paving slab supports of minimum 175 mm diameter (or equivalent base area).


All final details must to be confirmed with Bauder before proceeding.

System accessories

Not required.

Bauder lighting conductors.

Guidance for specification option:

Lightning conductor clips are a specially designed secure clip that allows for movement.

  • Bauder Lightning conductor clips – Type 4: polyvinyl chloride (PVC)-coated or bare conductor.

Bauder rainwater outlets.

Guidance for specification option:

Bauder has a range of insulated or stainless-steel rainwater outlets.

The insulated outlets can be used for maintaining thermal continuity at drainage points. Suitable for warm, cold and inverted roof construction. The BRE Certified (report no. HPR357-303748) high thermal value of the rigid foam body prevents condensation from forming on the underside of the outlet body.

Designed for use when connecting to conventional drainage systems and is suitable for both new build and refurbishment projects. Outlets are included in the Bauder waterproofing system guarantee as they are integrated components.

Flow rate figures (where applicable) are based on BS EN 12056:3:2000, typically taken using a 35 mm header of water including leaf grille:

  • Bauder Bitumen Compact Vertical Outlet DN100: Insulated internal outlet, 6.1 L/s.
  • Bauder Bitumen Vertical Outlet DN70: Insulated internal outlet, 7.1 L/s.
  • Bauder Bitumen Vertical Outlet DN150: Insulated internal outlet, 7.2 L/s.
  • Bauder Bitumen Letterbox Parapet Outlet DN 205 including stainless-steel leaf guard, 2.02 L/s.
  • Bauder Bitumen Parapet Outlet DN 100 including stainless-steel leaf guard, 1.06 L/s.
  • Bauder Bitumen Vertical Refurb Outlet DN70, designed to ensure the maximum flow rate of the existing downpipe is not exceeded.
  • Bauder Bitumen Vertical Refurb Outlet DN95, designed to ensure the maximum flow rate of the existing downpipe is not exceeded.
  • Bauder Bitumen Vertical Refurb Outlet DN145, designed to ensure the maximum flow rate of the existing downpipe is not exceeded.
  • Bauder Bitumen Parapet ‘Tell-Tale’ Overflow DN50, designed to be used in conjunction with other roof drainage outlets to ensure that there is no water ingress into the build and that the structural load of the roof is not exceeded and provides a visible warning that the roof is holding excessive water.

Bauder rooflights/ glazing/ ventilation.

Guidance for specification option:

All these glazing products are fully compatible with the roof waterproofing systems. Consult manufacturer for details and insert requirements.

  • BauderDOME Rooflight.
  • Bauder Euroglaze Rooflight.
  • BauderFLATGLASS Rooflight.
  • Bauder Special Modular Rooflight.
  • Bauder Continuous Rooflight.
  • Bauder Walk-on Rooflight.
  • Bauder Direct Glazing.
  • Bauder AOV.
  • Bauder Modular Link Glazing.
  • Bauder Structural Rooflight
  • Bauder Fire Rated Rooflight.

Water Flow Reducing Layer/ Vapour Permeable Membrane

Bauder JFRI WFRL.

Guidance for specification option:

Flexible and breathable sheet of polypropylene strands randomly spun-bound together, supplied as part of the JFRI Inverted Insulation system to minimize water flow through and below the insulation, therefore improving thermal performance.

  • Width: 3 m.
  • Length: 100 m.
  • Thickness: 0.45 mm.
  • Weight: 0.1 kg/m².
  • Colour: black.

Bauder XPS WFRL.

Guidance for specification option:

Flexible and breathable geotextile membrane of polypropylene strands randomly spun-bound together, supplied as part of the Bauder XPS Inverted Insulation system to minimize water flow through and below the insulation, therefore improving thermal performance.

  • Width: 3 m.
  • Length: 100 m.
  • Thickness: 0.17 mm.
  • Weight: 0.06 kg/m².
  • Colour: white.

Surfacing layer

Bauder Supported Paving.

Guidance for specification option:

A range of pedestal support systems designed to meet the exacting standards of finishing levels demanded when specifying open-jointed paving and decking finishes for hard landscaped intensive rooftops.

  • Bauder Slope Correcting (DPH) Pedestal: fully adjustable pedestal with slope corrector, achieves depths from 17–1070 mm.
  • Bauder Adjustable (PB) Pedestal: adjustable pedestal, achieves depths from 18–955 mm.
  • Bauder Non-Combustible (NC) Pedestal: all-metal, non-combustible, with integrated slope corrector, achieves depths from 42–282 mm.

Bauder Supported Decking.

Guidance for specification option:

A range of pedestal support systems designed to meet the exacting standards of finishing levels demanded when specifying open-jointed paving and decking finishes for hard landscaped intensive rooftops.

  • Bauder Slope Correcting (DPH) Pedestal: fully adjustable pedestal with slope corrector and available kit support for joist battens, achieves depths from 17–1070 mm.
  • Bauder Adjustable (PB) Pedestal: adjustable pedestal with available joist holder accessory for decking, achieves depths from 18–955 mm.
  • Bauder Non-Combustible (NC) Pedestal: all-metal, non-combustible, with integrated slope corrector and non-combustible Bauder Ali-Rail for decking, achieves depths from 42–282 mm.

Ballast (by others).

Guidance for specification option:

20–40 mm rounded washed pebbles.

Sustainability data

Material

Bitumen

Third party certifications

Third party certifications

EPD

EPD

Environmental Product Declaration - RBM

BBA Agrément Certificate

BBA Agrément Certificate

Certificate: Bauderflex Systems 10/4744

CCPI System

CCPI System

Bauder Bauderflex-BauderflexGreen-CCPI

Literature

Bauder Activator-Primer (Canister) APR01 - black

Bauder Activator-Primer (Canister) APR01 - black

Bauder GRP Trim & GRP Watercheck Trim

Bauder GRP Trim & GRP Watercheck Trim

Bauder Bitumen Compact Vertical Outlet DN 100

Bauder Bitumen Compact Vertical Outlet DN 100

Bauder Bitumen Vertical Outlet DN70 & 150

Bauder Bitumen Vertical Outlet DN70 & 150

Bauder SA Bonding Primer - Technical Data Sheet

Bauder SA Bonding Primer - Technical Data Sheet

Bauder waterproofing systems are now CCPI verified.

Bauder waterproofing systems are now CCPI verified.

BauderFLEX K4E Roofing membrane (Brown)

BauderFLEX K4E Roofing membrane (Brown)

BauderFLEX K4E Roofing membrane (Charcoal grey)

BauderFLEX K4E Roofing membrane (Charcoal grey)

BauderFLEX K4E Roofing membrane (Grey Slate)

BauderFLEX K4E Roofing membrane (Grey Slate)

Bauder LiquiDETAIL

Bauder LiquiDETAIL

Bauder LiquiFIBRE

Bauder LiquiFIBRE

BauderTEC Sprint DUO Roofing membrane

BauderTEC Sprint DUO Roofing membrane

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