KLIS JOINERY & CARPENTRY LTD
LONDON TIMBER SPECIALISTS
Upgrade to double or triple glazing without losing the character of your timber windows. Bespoke frames built and fitted by a specialist joiner, matched exactly to your existing style and proportions.
We build bespoke sash, casement, and bay windows to your exact opening, fit them with true double-glazed units, and finish everything to match your home, not a catalogue.
Call us if you’re experiencing:
Every frame is measured and built for your specific window opening. Glazing bars, sightlines, and proportions are matched to your existing style, so a Georgian six over six or a Victorian bay keeps its original look with modern performance behind the glass.
Full double glazed sealed units, not just an extra pane bolted on. Expect lower heat loss, reduced condensation, and a noticeably quieter home, especially on busier London streets.
Many London boroughs restrict window replacement in conservation areas and on listed buildings. We produce heritage-style timber double glazing designed to meet local planning expectations, so upgrading doesn’t mean a fight with the council.
Every frame is measured and built for your specific window opening. Glazing bars, sightlines, and proportions are matched to your existing style, so a Georgian six over six or a Victorian bay keeps its original look with modern performance behind the glass.
Full double glazed sealed units, not just an extra pane bolted on. Expect lower heat loss, reduced condensation, and a noticeably quieter home, especially on busier London streets.
Many London boroughs restrict window replacement in conservation areas and on listed buildings. We produce heritage-style timber double glazing designed to meet local planning expectations, so upgrading doesn’t mean a fight with the council.
No vague estimates. You get a clear written quote before any work begins, so there are no surprises on the day.
As a family business, our reputation is attached to every installation. We're accountable for the work long after we've left.
We regularly work on listed buildings and properties within conservation zones across London, and can advise on what's likely to be approved.
Fitting new double glazed timber windows doesn't mean a building site. We protect floors and furnishings, remove old frames carefully, and leave your home clean and tidy at the end of each day.
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 visit your property, assess your existing timber windows, and discuss whether double glazing, replacement, or a hybrid approach best suits your home. You'll get honest advice, not a sales pitch.
Once agreed, we measure precisely and build new timber frames to match your existing sightlines, glazing bars, and proportions, fitted with true double glazed sealed units.
Old windows are removed and disposed of responsibly. New frames are fitted, sealed, and finished to a high standard, with floors and furnishings protected throughout and the work area left clean.
Serving homeowners across London
We install double-glazing across central and west London. Not sure if we cover your area? Call or message us — we’re happy to advise.
Get in touch
Prices for bespoke timber double glazing typically start from £1,150 per window, depending on size, style, and complexity. Sash and bay windows generally cost more than standard casements due to the mechanisms and fitting time involved. We provide a written quote after a free home visit, with no hidden extras.
No. New frames are built to match the sightlines, glazing bars, and proportions of your existing windows, so the character of your property is preserved while performance is upgraded.
In many cases, yes. We produce heritage-style timber double glazing designed to meet local planning expectations. We’ll advise honestly on what’s likely to be approved for your specific property during the free home visit.
Most installations take one to two days per window, depending on size and access. We keep disruption to a minimum and protect floors and furnishings throughout.
Yes, we remove your existing windows and dispose of all waste responsibly, leaving your property clean and tidy once the work is complete.
Double glazing offers a strong improvement in warmth and noise reduction for most London homes. Triple glazing goes a step further and suits properties on busier roads or where maximum heat retention is a priority. We can talk through which makes sense for your windows.
Timber windows need periodic repainting or staining to protect the wood, typically every few years depending on exposure. We use quality timber and finishes to keep maintenance manageable.
Yes, all installations are covered by a workmanship guarantee, and glazing units carry a manufacturer’s warranty. Full details are confirmed in writing with your quote.
