Windows » Sliding Sash Windows » Timber
The design of our vertical sliding sash window is the product of an
extensive collaboration between our technicians and consultant
architect to ensure that our box sash reproduces, as faithfully as
possible, the simple grace of English sash windows progressively
developed from early use by Wren through their peak of elegance in the
late Georgian period and in common usage by the Victorians and
Edwardians.
In particular, the dimensions of our sash frames, meeting rails and glazing bars have been made slim, with traditional mouldings subtly modified to suit modern construction technology.
To carry the extra weight of double-glazed units, our sliding sashes are hung on solid brass/chrome/black chains (sash cords stretch and break) retaining the long proven reliability of simple counterbalance weights.
Quadruple draught strips stop rattles, and extremely high insulation (1.1W/m2K) glazing units minimise heat loss and down draughts. Multi-layer timber and very careful attention to detail, minimise the swelling and warping that causes jamming on windows of lesser quality during wet weather.
Technical summary:
- Hardwood, softwood or oak
- multi-layer timber sections
- fully drained and vented
- internally beaded
- hung on lead weights
- solid brass/chrome/black chains and pulleys
- quadruple draught strips
- brass/chrome/black fitch catch to meeting rail
- sash lifts to bottom rail
- factory glazed with argon gas filled sealed units comprising soft coat energy saving glass and warm edge spacer bars to give I. I W/m2K U-value
- factory finished with preservative, primer and two coats of micro-porous paint
