Sash windows

martinsurrey

DaftyDuck wrote: »

The "savings" in heat loss for installing double glazing are vastly exaggerated. To make it cost effective they would need to last hundreds of years, and they won't. Some have reasonable profiles, but they are pricey. Most have thick glazing bars and look hideous.

Standard single pane glass is 4.8W/(m^2)K
Standard double glazing (20mm argon) is 1.1W/(m^2)k

a winter living room at 18 degrees against an outside temp of freezing is an 18K difference.

A Victorian bay window may have 4m2 of glazing

Difference in heat loss is (4.8-1.1)*18*4 = 266w = 917BTU

so the difference is having this radiator running all the time (to keep the same temp difference)

extra rad needed

lstar337

Angellwelding&fabrication wrote: »

A good idea would be a bay window radiator.
This is still the most cost effective way of heating a house.
We can supply and form and shape radiator for bay windows

Google <snip> - they are based in London but supply radiators for this.

Hope that helps,
Elliot

You are not allowed to tout for business on this forum.

zoothornrollo_2

OP doesn't say anywhere how many windows that quote is for - I'd say it depends to a large degree on that. i.e., how good value the quote is.

Also, option 1 sounds expensive compared to 2. - ie., I would have thought new wood replacements would be much more than twice as much as refurb + soundproofing...?

We got double-glazed wood replacement sashes and it was some of the best money we spent - largely because of the amount of noise it cut out rather than heat (got acoustic laminate on outer pane, though hard to tell specific impact of that).

Just don't EVER go UPVC....

Private_Church

I agree with Zoothornrollo. Unless we know how many windows are to be replaced how can we give an accurate opinion.

As an example if you were replacing one boxframe sash window ( 6 pane sash above a 6 pane sash) constructed from Sapele hardwood,Primed,double glazed,weather/draught stripped ,brass ironmongery ,fitted you should expect to pay around £1800+vat .

For £14k (equal to"good quality Upvc") I would expect to replace around 7 double glazed windows............. Finishing the decorating would an be extra..

My advice would be overhaul if you plan to stay 3-5yrs but if you plan to stay there for 10yrs or more then replace the entire sash windows. They will add value to the property .