Discussion
Chaps,
What is more cost efficient, renovating old sash windows or replacing with new units?
To be specific, renovate and fit double glazed glass (is this possible, I've seen very thin panels) or fit new double glazed units (wood in the original style, not modern looking units).
I suppose the other consideration is efficiency, new units would have much better seals? (unless as part of renovating it's possible to fit better seals?)
What is more cost efficient, renovating old sash windows or replacing with new units?
To be specific, renovate and fit double glazed glass (is this possible, I've seen very thin panels) or fit new double glazed units (wood in the original style, not modern looking units).
I suppose the other consideration is efficiency, new units would have much better seals? (unless as part of renovating it's possible to fit better seals?)
Welcome to my world, Duke.
Recently bought a Grade II listed building with painted up sash windows. Have found a company called "Ventrolla" who will do effectively a bare metal respray on them, but at a price. Also fit better seals as part of the deal.
Just need to save up now
I've done some research on them and they come very highly praised. But, like I said, at a cost.
Recently bought a Grade II listed building with painted up sash windows. Have found a company called "Ventrolla" who will do effectively a bare metal respray on them, but at a price. Also fit better seals as part of the deal.
Just need to save up now

I've done some research on them and they come very highly praised. But, like I said, at a cost.
I have some experiance of this, as I am refurbishing my house with 27 sash windows, all of which were non-operative, painted shut and secondary double glazing installed. I'm in a conservation area as well.
I had to have 3 sash windows remade, and for a 36" x 40" window I paid £1400 (including single glaze in agricultural glass), I have since found a cheaper 1-man band and paid £800 each for 2 slightly smaller ones.
I got Ventrolla to quote for refurbishment of the remainder and almost had a heart-attack. I subsequently contacted local conservation office who gave me the name of 2 local firms. I ended up paying £200 per window for:
- Stripe out existing sashes
- Burn back facing wood and re-prime
- Remove old putty and re-putty each pane
- install new cords and reweight as necessary
- Install brush strips (essential for draught and noise proofing)
- Replace 3 glass panels (as cracked)
- Install 2 etched glass panels (for bathrooms)
It took 1 man 4 weeks to complete, they now all work perfectly. So my recommendation is to speak to the local council/conservation office and see who they suggest. Unless of course you are in Suffolk, and I can recommend someone.
I had to have 3 sash windows remade, and for a 36" x 40" window I paid £1400 (including single glaze in agricultural glass), I have since found a cheaper 1-man band and paid £800 each for 2 slightly smaller ones.
I got Ventrolla to quote for refurbishment of the remainder and almost had a heart-attack. I subsequently contacted local conservation office who gave me the name of 2 local firms. I ended up paying £200 per window for:
- Stripe out existing sashes
- Burn back facing wood and re-prime
- Remove old putty and re-putty each pane
- install new cords and reweight as necessary
- Install brush strips (essential for draught and noise proofing)
- Replace 3 glass panels (as cracked)
- Install 2 etched glass panels (for bathrooms)
It took 1 man 4 weeks to complete, they now all work perfectly. So my recommendation is to speak to the local council/conservation office and see who they suggest. Unless of course you are in Suffolk, and I can recommend someone.
We've used these guys: http://www.sashwindowsbristol.com/ in both our current and previous houses. They were very good, but not (as you're finding
cheap.

Duke Thrust said:
schmokin1 said:
A good friend of mine has a sash window restoration company in Kingston, Surrey. If you are close and would like his details, feel free to PM me.
Cheers
Schmo
Would he travel to the Cotswolds? (trying to get a range of quotes)Cheers
Schmo
Cheers
schmo
I live in a Victorian semi, with a massive FIVE windows! Two of which are recent (70's) crittle windows, yuk.
I would like to keep the sash windows as mine is the only house, in a row of eight, that still has them. All the rest have upvc double glazing in various disasterous states!
My q is, can double glazed units be fitted to original sash windows?
Eta I'm in Suffolk
I would like to keep the sash windows as mine is the only house, in a row of eight, that still has them. All the rest have upvc double glazing in various disasterous states!
My q is, can double glazed units be fitted to original sash windows?
Eta I'm in Suffolk
Edited by GTIR on Tuesday 27th October 11:35
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