Conservation Box Sash Window
QA Certificate
Certificate type
BSI Kitemark
Certificate type
Box sash window which uses cords, weights and pulleys to counter balance the sashes in the traditional way with the weights housed in a ‘box’.
High performance vertical sliding box sash windows with period sightlines and details.
| Finish | Colour from RAL classic range Insert requirement. Colour match Insert requirement. Dual finish Insert requirement. Three coats of spray applied water based micro-porous white paint (RAL 9003) |
| Color | All RAL colours and stain options |
| Material | Wood |
| WarrantyDescription | Timber: 30; Glazing, ironmongery and seals: 10; Paint finish: 10; Stain finish: 5 |
| Uniclass 2015 | |
| CAWS | L10/10 Wood windows L10/210 Wood windows |
| Product Reference | Conservation Box Sash Window |
| Timber | Engineered AccoyaRecommended in coastal areas. Engineered clear grade knot free Siberian Larch frame and sashes with Accoya internal/external liners and midrail with hardwood Sapele sillAs standard. Engineered Hardwood Red Grandis |
| Mullion section | 98 mm (up and over cord for triple sash only)162 mm220 mmNot required |
| Sill section (h x d) | 68 x 163 mm90 x 163 mm |
| Sill projection | 35 mm60 mm85 mm110 mm140 mm90 x 163 mm sill required. Flush |
| Horns | Not requiredAs drawing |
| External liner moulding | Bead mouldOvolo mouldNot required |
| Horns | RequiredNot required |
| Finish | Colour from RAL classic rangeInsert requirement. Colour matchInsert requirement. Dual finishInsert requirement. Three coats of spray applied water based micro-porous white paint (RAL 9003) |
| Windowboard groove | Not requiredRequired |
| Internal Glazing Bars and/or Perimeter Bead | 18 mm Fine Lambs Tongue18 mm Ovolo18 mm Square22 mm Lambs Tongue22 mm Ovolo22 mm Square28 mm Ovolo |
| External Glazing Bars | 18 mm chamfered putty bar22 mm chamfered putty bar28 mm chamfered putty bar6 mm ‘antiqued’ lead to internal and external faces of the outer pane9 mm ‘antiqued’ lead to internal and external faces of the outer pane12 mm ‘antiqued’ lead to internal and external faces of the outer pane |
| Glass units and whole product U-values/ G-values | 24 mm Double glass unit comprising 4 mm Tough / 16 mm Argon / 4 mm Tough Planitherm OneWhole window U-value: 1.3 Wm²K / G-value: 0.50. 24 mm Double glass unit comprising 4 mm Tough / 16 mm Argon / 4 mm Tough Planitherm Total+As standard. Whole window U-value: 1.4 W/m²K / G-value: 0.71. 24.8 mm Sound Control Double glazed unit comprising 6.84 mm Sound Control laminated/ 14 mm Argon/ 4 mm Tough Planitherm Total+Whole window U-value: 1.4 W/m²K / G-value: 0.66. Whole window acoustic performance RW (C;Ctr) = 36db (-1;-4). 14 mm Double glass unit comprising 4 mm Tough / 6 mm Krypton / 4 mm Tough Planitherm OneWhole window U-value: 1.7 W/m²K / G-value: 0.52. 14.8 mm Double glazed unit comprising 6.4 mm laminated / 4 mm Krypton / 4 mm Toughened Planitherm OneWhole window U-value: 1.9 Wm²K / G-value: 0.48 |
| Perimeter/Integral spacer bar | Black warm edge perimeter spacer and integral glazing bars within unit cavity24 & 24.8 glazing. White warm edge perimeter spacer and integral glazing bars within unit cavity24 & 24.8 glazing. Black aluminium perimeter spacer14 & 14.8 glazing. White aluminium perimeter spacer14 & 14.8 glazing. |
| Ironmongery | Brass sash catch, sash lifts, sash lock, sash pulleySelected Croft ironmongery with bespoke finishInsert requirement. Polished chrome sash catch, sash lifts, sash lock, sash pulleySatin chrome sash catch, sash lifts, sash lock, sash pulleyAntique Brass sash catch sash lifts, sash lock, sash pulleyOil Rubbed Bronze sash catch, sash lifts, sash lock, sash pulleySatin Nickel sash catch, sash lifts, sash lock, sash pulley |
| Trickle ventilation | Not requiredConcealed through frame head trickle ventilator (reduced EA)Trickle ventilator (4600 mm EA) - Surface mounted canopy |
| Child restrictor | RequiredNot required |
| Standard product features | Frame section: 110 x 160 mm (liner x depth). Sash section: 64 x 57 mm (top/ side rail x depth) with 94 mm bottom rail and 43 mm midrail. Timber: Engineered clear grade knot free timber, all FSC certified. Chain of Custody can be specified. Operation: Pre stretched nylon cords with sash weights and heavy duty pulley wheels. Finish: Three coat spray applied factory finish using water based micro-porous paint/ stain. Weatherseal: Schlegel Aquamac AQ109 with Sashglide® acoustic weatherpile. Glazing: Internally dry glazed and vented with glazing tapes in accordance with Glass and Glazing Federation requirements. Beading: Internal cassette beading. Performance:
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| Product Options | Type: Include specific frame dimensions, configuration and glazing bar designs with specification. Provide drawings if available. Feature windows: Shaped or curved on plan frames can be made to Mumford & Wood sections and details. |
| Platform | Compatible | Version | Certified to |
|---|---|---|---|
 IFC | IFC2X3 | 2 | 1.3 |
 Revit | Revit 2015 | 2 | 1.3 |
- Timber FSC Certified
- BS EN 644
- BS EN 6375 : Parts 1, 2, 3
- Energy Ratings A & B
- Energy Efficiency Recommended
- ISO 9001
- ISO 14001
- British Woodworking Federation Member
- Timber Window Accreditation Scheme Approved Manufacturer
- Wood Window Alliance Founding Member
- CE Marked
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