To triple glaze or not?

Steveb21 · 20 Jan 2020

Looking to replace my old wooden double glazed windows. Currently the windows at the front have another sliding glass in front to give them a 'triple glaze'
Live on a busy road so acoustic performance is a must.

Any one have views on how good/bad triple glazing is?

endecotp · 22 Jan 2020

Steveb21 said:
Looking to replace my old wooden double glazed windows. Currently the windows at the front have another sliding glass in front to give them a 'triple glaze'

So you have double glazing plus secondary glazing.

It’s quite likely this was done for soundproofing, and “triple glazing” i.e. three layers of glass close together will, I think, be inferior. For best results, consider replacing with something similar to what you already have.

Have you checked how much noisier it is when the secondary glazing is open?

Steveb21 · 24 Jan 2020

With the secondary glazing open the road noise is significantly increased, I must add those the double glazing windows are pretty old, wooden framed, has a felt type seal rather than rubber and the glass is not as thick as current standard.

I had a window company come out yesterday and he explained that triple glazing would maybe be a like for like replacement (for sound prevention) as my current double glazing is so old. He recommended to use Acoustic glass instead, 2 layers stuck together, air gap and a single layer. Reading online I think this maybe a better option.

Notch7 · 24 Jan 2020

there is quite a bit to sound reduction including using acoustic sealant when installing, avoiding trickle vents and using the right glass.

I came across this company which has some useful info -it might give you an insight into what type of windows to choose

https://thesoundproofwindows.co.uk/noise-reduction-products/noise-reduction-glazing/

endecotp · 24 Jan 2020

The people who visited will want to sell you something that they sell.

Tigercubrider · 24 Jan 2020

Do not get rid of the secondary glazing
It will remove a lot more noise than an all in one solution
It's mainly down to the air gap

Diver Fred · 24 Jan 2020

The bigger the air gap(s) the better.

standard Double Glazing is I believe, 24mm (that is comprised of 4mms glass, 16mm gap, 4mm glass). Triple glazing needs to add another 20mms to that making 44mm for the glazing panel thickness.

Secondary glazing inside double glazing should be expected to have a bigger 2nd gap so more effective.

Rad1o · 9 Feb 2020

We have various versions of triple glazing in the replacement windows in the house now. Out to a road we have - all fixed in one frame - 2 pus 1 in 2 windows and a triple glazed pane in another. The distance from inside pane to outside is quite big and comparing the 2 different window stales, now I would always go for the triple glazed pain, i.e. glass-spacer-glass-spacer-glass. The sound reduction is similar, but the heat insulation is much better. We went for tilt and turn windows for easier ventilation and no trickle vents.

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To triple glaze or not?

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