Secondary Glazing

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Original Poster:

745 posts

215 months

Saturday 10th October 2015
quotequote all
I live in a Victorian property with timber sash windows with slim profile. They are double glazed but far from efficient.

To improve efficiency and sound deadening, someone has suggested secondary glazing.

The (much more expensive) alternative, is new timber windows with acoustic glass. This will also change the look, due to the thicker profile.

Does anyone have experience of secondary glazing? Will it improve the sound proofing (key focus)? How do modern systems look? I seem to recall older systems looked awful!

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Original Poster:

745 posts

215 months

Saturday 10th October 2015
quotequote all
Thanks guys.

Yes, I understand the effectiveness depends on the space. I suppose the compromise is that the look less attractive if further from the window. I am planning on fitting plantation shutters which should reduce the visual impact.

Who did you use for supply? Everest claim to be the market leader but the service reviews are poor. Is this something a good local glazer can do?

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Original Poster:

745 posts

215 months

Tuesday 13th October 2015
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Thanks all. I have seen the product in more detail and it is not as unattractive as I expected. It can't be seen from the outside and if fitted together with plantation shutters, is barely visible from the inside.

They can be fitted directly on to the window frames, which clearly minimises the gap. Is this likely to have a material difference to the sound insulation vs fitting them on the cill and with larger gap?

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Original Poster:

745 posts

215 months

Wednesday 14th October 2015
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From what i'm told, provided your cill is deep enough (and you're willing to accept a smaller gap between the primary and secondary glazing), you can have both.

I will investigate and report back.

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Original Poster:

745 posts

215 months

Saturday 17th October 2015
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I got a quote from Everest. c£500 per window. This felt ridiculous to me but I am being overly optimistic?

Plantation shutters start at 30mm deep so they will fit along with secondary in my case, though this will depend on the depth of your cill.