- 138 Northwood Rd, Harefield, Uxbridge UB9 6PS
- Mon to Sun: 08:00 am to 06:00 pm
Original wooden windows showing rot, draughts or flaking paint? You rarely need to replace them. For more than 30 years, IM Glass has repaired, restored and re-puttied timber and sash windows for period homes across Hillingdon.
Timber window restoration is the careful repair and refurbishment of old wooden windows instead of tearing them out for modern plastic replacements. We treat the existing wood, splice in new timber where sections have decayed, upgrade the glazing seals and putty, and keep the original detail that gives a period home its character. It is part of our wider windows and glazing service across Uxbridge, Harefield and the surrounding villages.
Every job starts with a free on-site visit to check for hidden rot, failed putty and movement in the joints, followed by an honest, itemised quote. If a window is genuinely beyond repair we will say so, and our new window installation service can take over. If a pane is only cracked or misted, see broken window repair instead.
From a single spliced sill to a full house of restored sashes, we have an option to suit your windows and your budget.
We cut out only the decayed sections and splice in treated timber to match the existing frame, far cheaper than a full replacement.
Weak, sagging or loose frames reinforced with repaired joints and epoxy resin systems, so the window is solid again.
Broken sash cords replaced, weights rebalanced, pulleys serviced and draught-proofing added so box sashes glide and seal.
Failed putty raked out and replaced with traditional linseed putty, then sanded, primed and finished in microporous paint.
Recent restoration and reglazing work across period homes in the Hillingdon area.
Fresh linseed putty and reglazing, Uxbridge
Timber sash window repair in progress, Harefield
A snapshot of jobs recently finished by IM Glass across Uxbridge, Ruislip, Ickenham, Harefield, Pinner, Hillingdon, Ealing and Denham.

uPVC window fitted in Ealing

uPVC door and window fitted in South Ruislip

uPVC casement doors fitted in Ickenham

Anthracite grey casement doors fitted in Ruislip

Bifold doors fitted in Pinner

Light grey composite door fitted in Ickenham

Ruby red composite door fitted in Harefield

Anthracite grey door fitted in Harefield

Red front door with traditional leaded light fitted in Hillingdon

Broken down double glazed unit in Harefield, before

Broken down double glazed unit in Harefield, after

Light grey splashback fitted in Ickenham

Bespoke shower fitted in Denham

Bespoke balustrade glass fitted in Harefield

New mirror fitted in the women's changing room at Highgrove Swimming Pool, Ruislip
Repair keeps the character, costs less than replacement and can add another lifetime to the window.
Original wooden window designs add charm and authenticity that a plastic replacement loses.
Repairing sections, splicing timber and re-puttying costs far less than a set of new frames.
Repaired joints, new seals and draught-proofing cut heat loss and cold spots.
Properly restored timber windows can last another fifty years or more.
Like-for-like repair keeps you compliant where replacement windows are not allowed.
Well-restored period windows help maintain and even lift what your home is worth.
From first visit to the final coat of paint, here is exactly what to expect.
We visit your property, check for hidden rot, damaged timber and movement in the joints, then send a detailed, itemised quote.
Our craftsmen cut out decayed wood, splice in new treated timber, and rake out and replace failed putty using traditional methods.
We sand, prime and repaint the restored frames, then check the weatherproofing and that every sash opens and closes smoothly.
Linseed oil putty is the traditional way to bed and seal glass into a timber window. Over decades it dries out, cracks and drops away, which lets water reach the timber and starts the rot cycle. Raking out the old putty and re-puttying is often all a sound single glazed window needs.
We hack out the failed putty, clean and prime the rebate, re-bed the glass, then strike a neat new fillet of linseed putty. It has to skin over for roughly two weeks before it can take paint, so we come back to prime and finish it properly. On a full restoration the reglazing is done as part of the same visit.
Re-puttying alone is usually enough when the frame is sound, the timber is dry and only the putty has perished. Full restoration is the right call when the timber is soft or spongy, the joints have moved, sashes stick or the cords have snapped.
Local timber and sash window repair across Hillingdon and the surrounding villages, from Uxbridge and Harefield out to Chalfont St Giles.
Note: Uxbridge and Denham currently route to the homepage and Mill End page as no dedicated location page exists yet. Flag to the dev team if standalone pages should be built for full local SEO coverage.
IM Glass covers every part of your home's glazing, in one trusted local team.
Most rotten frames can be saved. We cut out only the decayed timber and splice in new treated sections, or strengthen the joints with epoxy resin. Full replacement is a last resort.
Yes. We replace broken sash cords, rebalance the weights, service the pulleys and add draught-proofing so box sash windows run smoothly and seal against draughts.
Yes. If the timber is sound and only the putty has perished, raking it out and re-puttying with traditional linseed putty is often all that is needed.
Linseed putty needs to skin over before it takes paint, usually about two weeks depending on the weather. We return to prime and paint once it has cured.
Yes. Like-for-like repair with traditional materials is usually the right approach where replacement windows are restricted. We can provide a description of the works for your planning or listed building consent.
Small jobs such as re-puttying or a single splice are often done in a day. A full restoration of several windows takes longer and is confirmed at your on-site visit.
We cover Uxbridge, Harefield, Rickmansworth, Mill End, Ruislip, Denham, Chalfont St Giles and the wider West London area.
Get a free, no-obligation quote today. Rotten frames repaired not replaced, sash windows overhauled and traditional putty reglazing, across Uxbridge and West London.