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Double Glazing

Community Veteran
Posts: 7,928
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Registered: 02-08-2007

Double Glazing

Just been reading that it's not uncommon for the seals on double glazing to fail after 15 years and the only effective remedy is to have them replaced.
If this it true then any savings made in having double glazing is going to be lost on the cost of replacement.
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Community Veteran
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Registered: 15-06-2007

Re: Double Glazing

Not really as the replacements are only the double glazed panes which are much cheaper than the original installation cost and are basically just a clip in to the existing frames.
Our previous double glazing - only 10mm air gap - only had one fail over a 30 year period and that was after about 20 years
Community Veteran
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Registered: 02-08-2007

Re: Double Glazing

Oldjim,
Not sure if you have been lucky or me being unlucky but we have 3 which have condensation starting to show, One is in a conservatory door and the quote on that (including fitting) is around £150 plus Vat.
This figure is just for the door so I don't expect much change out of £250 when the windows are included. 
Community Veteran
Posts: 38,251
Thanks: 937
Fixes: 56
Registered: 15-06-2007

Re: Double Glazing

The main thing is that the conservatory door will need toughened glass and that is expensive
This also applies to any window where the sill is less than about 1 metre from the floor (I don't remember the exact number) or is adjacent to an opening door
Community Veteran
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Registered: 11-08-2007

Re: Double Glazing

Try asking at your local glazing shop for a quote for a replacement sealed unit, they can usually make one up to your measurements overnight, and then fit it yourself.
Community Veteran
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Registered: 02-02-2008

Re: Double Glazing

If you're not sure, just wait until one of those "Windows Support" guys calls you from India and ask them........  Crazy
Community Veteran
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Registered: 21-03-2011

Re: Double Glazing

We had to  replace one of our wooden single glazed window sashes last year. £80 made to measure. The original it replaced was only 115 years old,  things just don't last like they used to.
Now Zen, but a +Net residue.
itsme
Grafter
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Registered: 07-04-2007

Re: Double Glazing

Quote from: gleneagles
Just been reading that it's not uncommon for the seals on double glazing to fail after 15 years

It's dependent on which way they are facing. Mine started to fail after 15 years and all the south facing units have gone after 23 years, which are 6 windows 10 units. None of the north facing units have gone. Currently waiting to be contacted to arrange a quote.
Infinity
Pro
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Registered: 19-06-2011

Re: Double Glazing

My previous place had all double glazing supplied & fitted by the owner, who in fact was the owner of  a large double glazing company.
(It was a new build mansion, so lots of windows)
Nearly all the units started to fail, condensation wise, after around 5 years !!
Doesn't say much for their quality.
The double glazing was in wooden frames, so it was just a matter of replacing the units within the frames.
The fitters said the previous units had not been installed correctly, some cushioning on the bottom of the frames was missing.
Not too expensive, and the replacement units have stood the test of time.
Community Veteran
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Registered: 24-09-2008

Re: Double Glazing

Quote from: gleneagles
Just been reading that it's not uncommon for the seals on double glazing to fail after 15 years and the only effective remedy is to have them replaced.

Ours failed after 5 years, we've had to replace double glazing units three times since 1990 and are going to have to do it again this year.
Both everest and a local guy claimed when the windows were installed they would have a lifetime guarantee, when we came to claim from Everest, they said a lifetime was 5 years (although you might possible expect 10 years)
What we are looking into at present is not sealed units, but hinged units with 2 layers of glass similiar to thaose used in Norway/Sweden/Finland.
The heat retention may not be as good, but the cost of replacement will be a lot less.