Get a free quote
Call the workshop or email us direct. We reply the same working day. Surveys are free and there is no obligation to go ahead.
Talk to someone who does the job
Calls come through to the workshop, not a call centre. If you have sizes, a photo or a drawing, send them over or bring them to the call. It saves a visit.
- Phone020 4634 6045
- Email[email protected]
- Workshop6 Atlas Road
Wembley, London
HA9 0JH - Opening hoursMon–Fri 8am–5pm
Site surveys can be arranged outside these hours - RegistrationFENSA registered installer
What we quote for
- Slim double glazing for sash windows
- Replacing the glass in a sash window, pane by pane
- Should you put double glazed glass in your sash windows?
- Repairing sash window glazing without replacing the glass
- Heritage glass in sash windows: what you have and what to do with it
- Sash window glass across London, and what each part of the city throws at you
- Ordering replacement panes for a sash window
Visiting the workshop
Atlas Road is off the North Circular near Wembley Central, roughly ten minutes from the A406 and five from Wembley Park. Call ahead so someone is free to see you.
Send us the details
The more you tell us, the more accurate the first price will be.
- Call 020 4634 6045 Mon–Fri 8am–5pm
- Email [email protected] Replies the same working day
- Workshop 6 Atlas Road, Wembley
London HA9 0JH
- Broken or cracked pane
- Slim double glazing
- Restoration glass
- Georgian bars or astragals
- Acoustic glazing
- Casement or steel windows
FAQ
Before you call
Can I double glaze my original sash windows?
Usually, with slim double glazed units made for period rebates. Whether it is possible in your case comes down to rebate depth, the condition of the timber and whether the sash can be rebalanced for the extra weight. It is a survey question, not a phone question, and anyone quoting without seeing the window is guessing.
How much better is slim double glazing really?
It is a substantial improvement on single glazing and it does not match a modern sealed unit. The cavity is too narrow for that, which is simply physics rather than a quality issue. What you notice is that the cold draught off the glass largely goes, condensation reduces, and the room is usable near the window in winter. If somebody tells you a slim unit performs like modern double glazing, treat the rest of their quote with caution.
Will I need listed building or conservation consent?
Possibly. Replacing like for like glass in a conservation area is usually fine. Changing single glazing to double glazing alters the appearance, and on a listed building it almost certainly needs consent. Different London boroughs take noticeably different views. We will tell you what we have seen locally, but the decision rests with your conservation officer and it is worth asking before you order.
Can you match old glass?
To a degree. Restoration and cylinder glass reproduce the gentle distortion and slight irregularity of handmade glazing, and on a visible elevation it is worth the difference. It is not identical to genuine Georgian or Victorian crown glass, and we would not claim it is. Where original glass survives and is sound, keeping it is always the better answer.
Will my sash windows still work afterwards?
They will if the weights are rebalanced, and that is exactly the step cheap jobs skip. Double glazing roughly doubles the glass weight, so the counterweights no longer match the sash. The result is a window that slides shut on its own or will not stay open. Rebalancing is part of the job, not an extra.
Is it cheaper to just replace the windows?
Sometimes, and we will say so if the frames have gone. But original sash frames are often in better condition than people assume, made from slow grown timber that outlasts most modern joinery, and replacing them is a far bigger job than reglazing them. Get the timber properly assessed before deciding. A rotten cill is a repair; a rotten frame is a replacement.