KLIS JOINERY & CARPENTRY LTD
LONDON TIMBER SPECIALISTS
Stop draughts, noise, and heat loss without replacing your windows. Discreet seals fitted into your existing frames. Durable and a fraction of the cost of replacement.
Call us if you’re experiencing:
Original timber windows were often built with small gaps between the sash and frame to allow smooth movement. Over time these widen as timber shrinks, paint builds up, and old seals perish. If you can feel a draught with the window shut, seals are usually the cause, not the frame itself.
Loose-fitting sashes rattle in the wind and let outside noise through. If your windows are otherwise sound but noisy in bad weather or on busy roads, tightening the seal around the sash, rather than replacing the window, usually solves it.
Uncontrolled air leakage around window frames is one of the most common causes of heat loss in period homes. Draught proofing significantly reduces this without the expense of new glazing, often paying for itself in a few years through lower heating costs.
Original timber windows were often built with small gaps between the sash and frame to allow smooth movement. Over time these widen as timber shrinks, paint builds up, and old seals perish. If you can feel a draught with the window shut, seals are usually the cause, not the frame itself.
Loose-fitting sashes rattle in the wind and let outside noise through. If your windows are otherwise sound but noisy in bad weather or on busy roads, tightening the seal around the sash, rather than replacing the window, usually solves it.
Uncontrolled air leakage around window frames is one of the most common causes of heat loss in period homes. Draught proofing significantly reduces this without the expense of new glazing, often paying for itself in a few years through lower heating costs.
Reach out to Klis Joinery & Carpentry for an obligation-free discussion and a complimentary at-home consultation to discuss your timber windows. We’re not pushy, and we’re not a hard sell. We’re here to offer sound, reputable advice that allows you to make an informed decision.
We’re proud of our consistently high ratings on Checkatrade and Google. Our work is regularly praised for reliability, workmanship, and attention to detail — not just the finished result, but the way we carry out the job from start to finish.
We'll assess your windows honestly and explain your options clearly. If draught proofing is the right fix, we'll get it done properly. If your frames need more than that, we'll tell you honestly. No pressure, no upselling.
From traditional sash and casement windows in older properties to more recent installations, we understand how to fit discreet seals that work with your windows, not against them, whatever the age or style of your home.
Draught proofing doesn't mean removing your windows. We work carefully around existing frames and finishes, and most jobs are completed within a day, with no mess left behind.
Reach out to Klis Joinery & Carpentry for an obligation-free discussion and a complimentary at-home consultation to discuss your timber windows. We’re not pushy, and we’re not a hard sell. We’re here to offer sound, reputable advice that allows you to make an informed decision.
We come to you, assess your windows in person and provide a clear written quote. No call centres, no pressure, no obligation.
Discreet brush or compression seals are fitted directly into your existing sash or casement frames, matched to the gaps causing draughts. No new joinery, no waiting on bespoke manufacturing.
Every window is opened, closed and checked before we leave, so seals sit correctly and windows still operate smoothly. Site left spotless. We're on hand if you need us after the job is done.
Serving homeowners across London
We install draught-proofing across central and west London. Not sure if we cover your area? Call or message us — we’re happy to advise.
Get in touch
Draught proofing significantly reduces cold air, noise and heat loss, but no seal can guarantee a completely draught free result forever. Seals wear over time, and very old frames may retain some minor air movement even after treatment. What you can expect is a noticeable, lasting improvement, especially if your windows currently rattle or let in a clear draught.
No. Seals are fitted to allow smooth operation, and we test every window before we leave to make sure it opens, closes and locks properly.
Yes, provided the timber frame itself is sound. If the frame has rotted or is structurally compromised, we’ll tell you honestly and discuss repair or replacement first, before draught proofing.
Yes. Draught proofing is a reversible, non-invasive method and is generally well received by conservation officers, since it doesn’t alter the window’s appearance or original fabric.
Most homes are completed within a day, depending on the number of windows. We’ll give you a clear timeframe during your free home visit.
Properly fitted seals typically last 10 to 20 years, depending on how much the windows are used and general wear.
Yes. We work carefully around your existing windows and leave no mess behind. Every window is tested before we finish the job.
Draught proofing typically starts from around £280 per window, depending on size, condition and the number of windows. We’ll provide a clear written quote after a free home visit, with no hidden costs.
