Period Property Window Repairs London
Original timber windows give heritage homes their defining character. You can't just rip them out and expect the property to look the same. Those centuries-old sash and casement frames carry a level of craftsmanship that modern factories simply don't replicate. Of course, after decades of facing the harsh British weather, problems inevitably crop up. Rattling sashes, snapped cords, peeling gloss, and downright rotten sills are just part of the reality of owning an older property.
We firmly believe replacement is an absolute last resort. Our main focus is sympathetic restoration—meaning we save the original wood and historic glass whenever physically possible. Doing things properly not only protects the real architectural value of your house, but it also keeps you well clear of any trouble with local conservation area officers.
How We Actually Fix Heritage Windows
Every job is different, but the process usually follows the same logic: find out what's wrong, fix only what needs fixing, and leave the rest alone.
- Timber repairs — If a section of the frame or sill has rotted, we don't replace the whole box. We cut back to sound wood, splice in hardwood that matches the profile, and shape it to fit. Once it's painted, you won't know it was ever touched.
- Glazing bars and sash horns — These get damaged more than people realise, usually from years of forced openings or old paint buildup. If they're beyond saving, we make exact replicas in the workshop. Getting the profile right matters — a slightly-off glazing bar stands out on a period property.
- Sash operation — A sash that won't stay up, or one that's been painted shut for thirty years, is one of the most common things we deal with. We strip it back, re-cord it, clean up the pulleys, and adjust the weights so it balances properly. A well-functioning sash should glide with one hand and stay exactly where you leave it.
- Draught sealing — We rout slim channels into the existing timber and fit brush seals. It makes a noticeable difference to heat retention and noise, and from the outside, the window looks completely unchanged. No plastic trims, no visible additions.
Common Headaches with Period Joinery
Living in a classic London townhouse—whether it's Victorian, Georgian, or Edwardian—is brilliant, but it usually involves putting up with temperamental old joinery. Our repair service specifically targets the issues that drive homeowners up the wall.
Rotted-out Sills
Water tends to pool at the base over the years, turning the bottom sill to mush. We simply chop out the bad wood and fit a brand-new, treated timber sill without disturbing the rest of the box.
Painted Shut
Generations of eager decorators slathering on gloss paint will eventually weld a window shut. We painstakingly strip it all back, sand out the running channels, and get things moving properly again.
Cracked Putty & Rattles
Old linseed putty goes bone dry and cracks off, leaving the panes loose. We secure the glass with traditional hand-puttying and slip modern draught excluders into the frame to kill the noise.
Conservation Areas & Listed Buildings
"Preserving the soul of London's historic streetscapes."
If your period property is located within a London Conservation Area or is a Grade II Listed Building, strict regulations govern what changes can be made to the exterior. Unapproved replacements (such as uPVC or inappropriately styled timber) can lead to enforcement action by the local council.
Because we prioritize architecturally accurate restoration, local conservation officers consistently approve our work. Retaining the primary frame and only introducing new wood where it's absolutely needed means your home stays historically authentic, whilst becoming notably warmer and more secure.
Can period windows be double glazed?
Yes. During the repair process, we can often retrofit Slimline Heritage Double Glazing into original period sashes. These units are ultra-thin and fit within traditional timber rebates, providing modern energy efficiency without the bulky appearance of standard double glazing. This is a very popular upgrade.