Timber Box Sash Windows
Verified by manufacturer 5 days ago
Legacy Weights Balance
Legacy Weights Balance
PAS 24
Certificate type
PAS 24
Certificate type
Weathertightness Testing
Certificate type
SRL
Certificate type
Timber wood box sash windows.
Application
Residential spring sash windows, suitable for new build or refurbishment projects.
Description
Westbury timber wood sash windows offer a distinctive style, period authenticity and traditional sight lines. The Box Sash Windows use pulleys, cords and weights to counter balance the top and bottom sashes. Offering the best of tradition and modern technology, they retain authentic heritage styling with the latest technology for improved security, thermal and acoustic performance.
Features and benefits:
- Incorporate a heritage design.
- Distinctive design features include decorative sash horns, a concealed trickle vent detail, deep moulded lamb’s tongue profiles with 21 mm glazing bars and internally moulded staff beads.
- The weights are housed in a ‘box’ created by liners extending the frame on each side internally and externally.
- These energy-efficient timber windows are made from premium grade, knot-free engineered Accoya and European Redwood. Accoya is a sustainable wood that is laminated to provide excellent stability and a superior finish.
- Treated with a three-coat, spray-applied, microporous paint system prior to delivery.
General information
Color | Beige Black Cream Grey Ivory |
Finish | Painted |
Material | Glass Timber |
Shape | Rectangle Square Other |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | Ten year Guidance for specification option: Glass, hardware, weather seal and paint. |
Uniclass | |
CAWS | L10/10 Wood windows L10/210 Wood windows |
Specification data - Wood window units
Standard | To BS 644:2009. |
Dimensions and configurations | Sliding down LSSWB. Sliding down LSSWB horns. Sliding up LSSWB. Sliding up LSSWB horns. Top Fixed LSSWB. Top fixed LSSWB horns. Bottom fixed LSSWB. Bottom fixed LSSWB - no fastener. Bottom fixed LSSWB horns. Bottom fixed LSSWB horns - no fastener. As drawing. Guidance for specification option: Insert details as required. As schedule. Guidance for specification option: Insert details as required. Manufacturer guidanceConsult manufacturer for details as required. |
Product performance | |
Weather performance | |
UK exposure category | To BS 6375-1, 2000 Pa. |
Air permeability | To BS 6375-1, Class 4. Guidance for specification option: Air permeability tests in accordance with BS EN 1026:2000. |
Watertightness | To BS 6375-1, Class 8A. Guidance for specification option: Watertightness test in accordance with BS EN 1027:2000. |
Resistance to wind load | To BS 6375-1, Class A5. Guidance for specification option: Wind resistance tests in accordance with BS EN 12211:2000. |
Thermal | |
Whole window U-value | Manufacturer guidanceInsert requirements. |
Frame | |
Standard | To BS EN 942. To BS EN 14220. |
Profile | Heritage (silicon glazing). Classique (silicon glazing). Heritage (vented/ gasket glazing system). Classique (vented/ gasket glazing system). |
Wood species | Accoya and European redwood. Guidance for specification option: Premium grade, knot-free engineered Accoya and European Redwood. Accoya is a sustainable wood that is laminated to provide excellent stability and a superior finish. |
Finish as delivered | Water-based microporous paint. Guidance for specification option: Creates an extremely durable and highly protective barrier against weather, high levels of UV exposure and fungal attack. They also contain greater quantities of pigment, needed for quality paint, giving the colour greater clarity and less fading. When properly cared for these paints will protect for 12 years or more before repainting may be required. |
Ventilator | External - Pair Select GN16 148 Grille Brown. External - Pair Select GN16 148 Grille White. Internal - Select XR16 4600EA Brown. Internal - Select XR16 4600EA White. Internal - Select XR16 4600EA Clotted Cream. Internal - Select XR16 4600EA Anthracite Grey. Internal - Select XR16 4600EA Black. |
Frame horns | Manufacturer guidanceInsert requirements or omit. |
Glazing or infill | |
Requirements | 16 mm glass. 4T-8-4T low-E. 4T-6-6T Black Lacobel low-E. Manufacturer guidanceSee Coatings for further options. |
Hardware | Manufacturer's standard. Guidance for specification option: See below for Fastener, Vent locks, Window lifts and Window pulleys. |
Operation | |
Type | Manual. |
Fixing features | Manufacturer guidanceInsert requirements. |
Colour | 01 Westbury White. Guidance for specification option: RAL 9010. 02 Birch. Guidance for specification option: Farrow & Ball Lime White. 03 Westbury Stone. Guidance for specification option: Farrow & Ball Drop Cloth. 04 Holland Linen. Guidance for specification option: M&L Candle. 05 Upton White. Guidance for specification option: Farrow & Ball James White. |
Spacer bar | Black. White. |
Gas | Argon. Krypton. |
Glazing beads | Glazing beads - scribed/ scribed. RF panel glazing beads – MAR. VEE board panel glazing beads - mitred/ scribed. |
Coating | None. SN70/35 4/6 mm. Westbury SunGuard 4S. SKN 176. |
Glazing options | None (clear glass). 6 mm Diamond Lead 135 x 230 mm. 9 mm Diamond Lead 135 x 230 mm. 6 mm Antiqued Diamond Lead 135 x 230 mm. 9 mm Antiqued Diamond Lead 135 x 230 mm. |
Glazing accessories | Bonded astragals. 21 mm putty style bar with no integral bar. 21 mm putty style bar with 18 mm integral bar. QWOOD bonded astragals. Supplier bars - internal/ applied. |
Frame | Legacy frame SSWB flush sill. Legacy frame SSWB projected sill. Legacy frame SSWB flush sill - with vent profiles. Legacy frame SSWB projected sill - with vent profiles. Legacy frame SSWB flush sill arched. |
Frame accessories | Legacy SSWB sash bar horizontal. LSSWB solid bar horizontal. LSSWB sash bar vertical. LSSWB solid bar vertical. |
Seals | Weatherseal, brown/ black. Weatherseal, white. |
Fastener | Forged hook fastener locking narrow - polished brass. Forged hook fastener locking narrow - polished brass (x2). Forged hook fastener locking narrow - polished chrome. Forged hook fastener locking narrow - polished chrome (x2). Forged hook fastener locking narrow - satin chrome. Manufacturer guidanceHandle/ fastener. |
Vent locks | No stops. Lockable vent lock - polished chrome. Lockable vent lock - polished brass. Lockable vent lock - satin nickel. Lockable vent lock - satin chrome. |
Window lifts | Sash lift curved neck - polished brass. Sash lift curved neck - polished chrome. Sash lift curved neck - satin chrome. Sash lift curved neck - satin nickel. Heavy curled sash lift – antique brass. |
Window pulleys | Brass. Polished chrome. Satin chrome. Antique brass. Satin nickel. |
Sill projection | Flush. 50 mm. 63 mm. 75 mm. 80 mm. Manufacturer guidanceWith or without cill weathering groove. Insert requirements. |
Transom | Transom SSWB. |
Mullion | Legacy mullion. |
Accessories | None. Glazing tape, 2x12, black - internal. Glazing tape, 2x12, white - internal. Glazing tape, 2x12, black - external. Glazing tape, 2x12, white - external. |
Integral accessories | Sash cord, white. Sash cord, white - bottom sash. Sash cord, black. Sash cord, black - bottom sash. |
Silicon sealant colour | Portland stone low silicone. Mid grey silicone. Buff low mid silicone. Clear low mid silicone. Anthracite silicone. |
Sustainability data
Contains Red List materials | No |
Country of product manufacture | United Kingdom |
Material | Glass Timber |
Expected Life | 60 year |
BIM objects
NBS BIM Object Standard
This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.
Find out more about the NBS BIM Object Standard.
| Platform | Compatible | Version |
|---|---|---|
 Revit | - | 1 |
 IFC | - | 1 |
Product certifications
PAS 24
15521 - PART Q COMPLIANT CERTIFICATE
PAS 24
R15521 Security Testing
Weathertightness Testing
W15232-3 Weather Final Test Report
SRL
SRL Acoustic 23410 - T01
Literature
Literature type
Westbury Colour Chart
Sash Windows - Ironmongery Finishes
WWJ 2024-25 Brochure
Case studies
Classic Georgian New Build
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