Draught-seal your sash windows without altering their appearance. The Reddiseals system eliminates cold air infiltration and significantly reduces noise - typically in a single day.
Timber sash windows in their original form are notoriously draughty. The gaps between the sash and the frame, around the parting beads, and at the meeting rail all allow significant cold air infiltration - particularly in older windows where the beads have shrunk or the sashes have dropped.
We fit the Reddiseals draughtproofing system - a pile seal installed into routed channels in the parting beads and frame head. It closes the gaps precisely, without affecting the sliding operation of the sashes or changing the visual appearance of the window from inside or outside.
Draughtproofing is almost always combined with a full mechanical overhaul - because if the window is being stripped down to fit seals, it makes sense to replace worn cords and ironmongery at the same time. It can also be fitted as a standalone service where the window is mechanically sound.
Book a free survey →Air infiltration through gaps around sash windows accounts for a significant portion of heat loss in period homes. Sealing these gaps is one of the most cost-effective improvements available.
The same gaps that let cold air in let traffic and street noise in too. A properly draughtproofed sash window is noticeably quieter - particularly in urban London locations.
Unlike double glazing, draughtproofing requires no planning permission and is accepted by all conservation officers and Historic England - making it the right first step on any listed or conservation property.
Every property is surveyed in person - no estimates from photos, no hard sell.