Português
EnglishThe sash window, which opens by sliding vertically, is a signature of both Portuguese and Anglo-Saxon historic architecture. For years it was avoided as cold and hard to maintain. Rebuilt today in laminated timber, with double glazing and modern mechanisms, it offers all of the charm and none of the old headaches.
The modern sash keeps the historic appearance that renovation work demands, but adds double glazing, effective seals and counterweights or springs that make opening smooth and safe.
Why choose a sash window
In listed buildings, or buildings with character, municipal rules often require the original window design to be kept. The sash answers that requirement, and because it opens vertically it is practical on balconies and in kitchens where a casement leaf would be in the way.
Modern performance
The current version uses stable laminated timber, low-emissivity double glazing and continuous seals. Thermal and acoustic insulation is beyond comparison with old sash windows, without that whistle of wind on a winter night.
A smooth, safe mechanism
Traditional counterweights have given way to spring systems or balanced weights that hold the sash in any position without dropping. Some versions tilt inwards, which lets you clean the outside of the glass from indoors — a luxury old sash windows never had.
