Westbury Timber Spring Sash Windows
Verified by manufacturer 5 days ago
Spiral Balance MK2
Spiral Balance MK2
Range of timber wood spring sash windows.
Application
Residential spring sash windows, suitable for new build or refurbishment projects.
Description
Westbury timber wood sash windows slide open with ease and smooth movement, offering exceptional security, thermal and acoustic performance. The spring balanced sash window is a contemporary alternative to the classic box sash window, using a spring-loaded mechanism instead of the pulleys, cords and weights found in a traditional box sash window. They are often used in new builds where a flush reveal has been detailed by the architect. Legacy sliding sash windows have thinner frames, sash and glass sections and are suitable for replacing draughty single glazed windows. They give a modern performance without losing the traditional heritage sash window aesthetics.
Features and benefits:
- Distinctive style, period authenticity and have traditional sight lines.
- Contemporary alternative to the classic box sash window.
- Uses spring-loaded mechanism instead of the pulleys, cords and weights found in a traditional box sash window.
- Legacy design incorporates slimmer double glazed units in a thinner sash section for a more traditional appearance.
- 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 SSSB.Sliding down SSSB horns.Sliding up SSSB.Sliding up SSSB horns.Top Fixed SSSB.Top Fixed SSSB horns.Bottom fixed SSSB.Bottom fixed SSSB - no fastener.Bottom fixed SSSB horns.Bottom fixed SSSB 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. |
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: Specify Colour separately below. 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.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-8-4T low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-6-6T Black Lacobel low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 28 mm glass.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-20-4T low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-18-6.8L low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 6T-16-6T low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 6T-16-6.8L low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 6T-14-8.8L low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-20-4T low-E Guardian Sun.Guidance for specification option: Specify infill gas separately; see Gas below. 6T-16-6.8L low-E Guardian Sun.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-18-6T Black Lacobel low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 30 mm glass.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-8-4T-8-4T low-E.Guidance for specification option: Specify infill gas separately; see Gas below. 4T-8-4T-8-4T Soft Coat 1.0 (x2).Guidance for specification option: Specify infill gas separately; see Gas below. Fire glass.Guidance for specification option: Specify infill gas separately; see Gas below. 15 mm PyroStop-10-6.4L low-E - fire glass.Guidance for specification option: Specify infill gas separately; see Gas below. Special glass.Guidance for specification option: For quotes only - must be replaced for orders. Consult manufacturer for options and insert requirements. Manufacturer guidanceSee Coatings for further options. |
Hardware | Manufacturer's standard.Guidance for specification option: See below for Fastener, Vent locks and Window lifts. |
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. Guidance for specification option: Double glazing only. Krypton. Guidance for specification option: Double glazing only. Not applicable. Guidance for specification option: Single glazing. |
Glazing beads | Glazing beads - scribed/ scribed. Vented / gasket 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. QW 21 mm putty style bar with 18 mm integral bar. 9 mm rectangular leading. |
Frame | Frame SSSB2 Flush sill. Frame SSSB2 Proj. sill. |
Frame accessories | SSSB solid bar horizontal. SSSB solid bar vertical. |
Seals | Spiral balance - brown/ black weatherseal. Spiral balance - white weatherseal. |
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. |
Sill projection | Flush. 50 mm. 63 mm. 75 mm. 80 mm. Manufacturer guidanceWith or without cill weathering groove. Insert requirements. |
Transom | Not required. |
Accessories | None. Glazing tape, 2x12, black - internal. Glazing tape, 2x12, white - internal. Glazing tape, 2x12, black - external. Glazing tape, 2x12, white - external. |
Integral accessories | White spiral balance tubes. Brown spiral balance tubes. Cream spiral balance tubes. Black spiral balance tubes. |
Sustainability data
Contains Red List materials | No |
Country of product manufacture | United Kingdom |
Material | Glass Timber |
Expected Life | 60 year |
Literature
Westbury Colour Chart
Sash Windows - Ironmongery Finishes
Case studies
Classic Georgian New Build
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