Traditional Spring Sash Windows - Double
Spring sash windows which offer a cost-effective alternative to traditional box sash designs. They deliver classic style, but incorporate a simpler, more compact and modern spring balance mechanism in place of weights and pulleys.
Double-glazed as standard, they are available with safety glass, obscured glass, acoustic glass or solar control glass. Triple glazing is also available to special order. Twin gasketing ensures reliable weather containment. The windows are suitable for mid-range new developments, as well as replacing classic windows on non-listed buildings.
Bespoke windows and doors are available; consult manufacturer for details.
Size | As drawingInsert reference. As scheduleInsert reference. |
Material | Engineered AccoyaEngineered European oakEngineered hardwoodEngineered redwoodStandard. |
Finish | Dual finishInsert requirement. RAL classic rangeInsert requirement. StainInsert requirement. |
Color | Colour from RAL classic range - standard, dual finish or stain - optional |
Features | Modern spring balance mechanism, cost effective, triple glazing available, good weather containment |
Shape | Rectangle |
Uniclass 2015 |
Product Reference | Traditional Spring Sash Windows |
Size | As drawingInsert reference. As scheduleInsert reference. |
Material | Engineered AccoyaEngineered European oakEngineered hardwoodEngineered redwoodStandard. |
Sill projection | 35 mm50 mm60 mm70 mm80 mm90 mm100 mm110 mm |
Horns | Not requiredAs drawing |
Horns | Not requiredType H1Type H2Type H3Type H4Type H5Type H6 |
Windowboard groove | RequiredNot required |
Internal Glazing Bars and/or Perimeter Bead | 18 mm lambs tongue type 218 mm ovolo profile type 222 mm lambs tongue type 122 mm ovolo profile type 1 |
External Glazing Bars | 18 mm chamfered putty bar22 mm chamfered putty bar |
Finish | Dual finishInsert requirement. RAL classic rangeInsert requirement. StainInsert requirement. |
Glass units | 24 mm double glass unit4 mm tough/ 16 mm argon/ 4 mm tough Low-E. 24.8 mm sound control double glazed unit6.8 mm sound control laminated/ 14 mm argon/ 4 mm tough low-E. Special orderInsert requirement, safety, obscured, acoustic or solar control glass options available. |
Perimeter/Integral spacer bar | Black warm edge perimeter spacer and integral glazing bars within unit cavityMatt chrome warm edge perimeter spacer and integral glazing bars within unit cavityWhite warm edge perimeter spacer and integral glazing bars within unit cavity |
Ironmongery | Antique brass sash fitch fastener, sash lifts, sash pulleysBrass sash fitch fastener, sash lifts, sash pulleysOil rubbed bronze sash fitch fastener, sash lifts, sash pulleysPolished chrome sash fitch fastener, sash lifts, sash pulleysSatin chrome sash fitch fastener, sash lifts, sash pulleysSatin nickel sash fitch fastener, sash lifts, sash pulleysSpecial orderSelected Croft ironmongery with bespoke finish is available; consult manufacturer and insert requirement. |
Trickle ventilation | Not requiredConcealed through frame head trickle ventilator |
Child restrictor | Not requiredAngel lockStandard. Traditional sash stop |
Standard product features | Frame: 55 x 160 mm (lining width x frame depth), manufactured using mortise and tenon joints, glued and mechanically fixed. Sash: 39 x 55 mm top rail and stiles, 90 x 55 mm bottom rail, 45 x 55 mm meeting rail. Mullion/ transom: 110 mm wide (70 mm for triple sash with fixed outer sash). Sill section (h x d): 54 x 160 mm. Staff/ parting beads: Timber. Wood moisture content: 12–19%. Glazing beads: Internally beaded. Sill: Solid hardwood. Horns: Solid feature horns to top sashes are included as standard. Fittings: A lockable fitch fastener and two finger pulls to the bottom sash. Mechanism: Sashes are hung on pre-tensioned constant force spiral balances. Weather seal: The window is fully weather sealed to BS EN 6375-1. Performance:
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Product Options | Finish: Three coat spray applied factory finish using water based micro-porous paint/ stain. Trickle ventilation: Concealed through frame head trickle ventilator: 1700 mm², 4400 mm² or 5000 mm² air flow dependent on frame width. |
Platform | Compatible | Version | Certified to |
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![]() | - | 1 | 2.1 |
![]() | Revit 2017 | 1 | 2.1 |
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