Is secondary glazing better than double or triple glazinf for noise insulation?

(113 Posts)
MinimalistMommi Mon 04-Feb-13 10:41:36

Victorian period property cottage. Single glazed sash windows. The noise from busy-ish street is really upsetting/stressing me out. Didn't realise it would be this noisy until we moved in and then, of course, it's too late sad

DP's want me to rip out original windows and replace with UPVC style sash windows. I worry about ripping out original features and losing value on house.
I've read that secondary glazing, although a bit ugly, is better at noise reduction than double/triple glazed windows. Is this true?

Also has anyone here fitted secondary glazing and has it actually reduced noise? I would live to know! thanks

I really need mumsnetters help otherwise I'm gong to have to think about selling and buying again. sad

(More background information, front door opens directly into living room, I don't know if this 'lets in more noise' than a wall IYKWIM in comparison to separate hall and porch etc)

sophiebygaslight Sat 09-Aug-14 21:36:43

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theweasels Thu 07-Aug-14 12:41:46

great article here about double glazing sound properties -

whydontieverlisten Thu 26-Jun-14 15:50:43

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spotm82 Wed 21-May-14 23:46:04

We were in a similar predicament. We opted to have the wooden framed sash removed and had exact pvc replicas made with pvc and stadip silenced glass rather than restoration and secondary glaze. We are so happy with the finish we have little to no exterior noise and the neighbours have had to look closely to see they are new windows. We live in a conservation area. Everybody is so impressed with the look. If you find a good local company and do some research the results are fantastic. Hope this helps

PigletJohn Thu 30-Jan-14 13:03:38

Excellent news.

horsetowater Thu 30-Jan-14 12:23:47

It's a 1905 house, excellent solid building and windows are very solid but I can imagine that there may be existing gaps between the casement and bricks. They were not designed to cope with double decker diesel buses driving up the road.

I am going to contact a joiner who might be able to completely refurbish the windows. It would be mad to skip them but they will need removing, restoring and putting back in, probably more work than putting in UPVC.

PigletJohn Thu 30-Jan-14 11:28:44

Very often there are gaps between the window frame and the wall, even if they have been hidden by trim. Replacement windows are often very bad for that. On the outside you need a weatherproof seal such as silicone or a hardwood fillet, and can then inject expanding foam into large gaps before using a trim or paintable seal on the inside.

If the casements are a poor fit in the frames there are various EDPM profiles (don't use foam strip) and for sliding sashes, a brush or furry pile. They all stick to clean fresh paint but not to dirt or eroded paint.

You will have to provide ventilation.

horsetowater Thu 30-Jan-14 11:07:44

Cracks and gaps where - in the windows or around?

PigletJohn Thu 30-Jan-14 11:03:51

Lightweight acrylic is not as effective for sound as heavy glass. Pay special attention to cracks and gaps that sound will get through.

horsetowater Wed 29-Jan-14 21:25:45

I think we might try the DIY magnetic stuff. At least if it doesn't work we've only lost a few hundred pounds. We will refurbish the original windows as well. I don't trust the sales people.

MinimalistMommi Wed 29-Jan-14 17:44:43

*too = top

MinimalistMommi Wed 29-Jan-14 17:44:23

The fitter came around, stepped into our front room and said "This hasn't worked has it"

Also I rang head office immediately the fitters left. I was in shock, it had cost us the best part of £4,000 for four sash windows and it was like we had had nothing done. There was only a very very slight improvement. But not the four times reduced the website claimed though. In hindsight though I wonder if it was the conditions of our house though? Gappy victorian front door? New air bricks that had been added as a condition of the mortgage? Sash windows that were letting noise in, maybe they were too gappy? But that must be me being kind though as they didn't work in any of the rooms and we don't have front doors and air bricks in each room of our house grin we'e payed for too spec stadip silence glass too shock

horsetowater Mon 27-Jan-14 21:52:03

Oh dear we are just about to sign up for secondary double glazing. How did you prove they didn't work and get them removed? And why didn't they work?

MinimalistMommi Sun 26-Jan-14 15:18:43

Bears sorry only just saw this! Barely any reduction in noise at all. I'm not sure why, maybe our windows were simply too gappy?!

BearsOhMy Thu 07-Nov-13 22:38:52

I've got the same issue, moved into a Victorian property on a busy road a week ago and the noise is driving me mad!! We have lovely refurbished sash windows and I was looking at secondary glazing. I read the thread with real interest and was gutted to see your last post where you said the secondary glazing didn't work! When you say it hasn't worked, do you mean there was no reduction in noise whatsoever? Why was that when other posts mentioned good results?

MinimalistMommi Mon 02-Sep-13 12:08:41

Should have updated this for other mumsnetters. The secondary glazing didn't work and had to be removed by company (which left a right mess) obviously we didn't pay anything. Looking at other options now for noise reduction or just leaving sash windows as they are. They're very breezy/cold in winter though...

Blankiefan Sun 01-Sep-13 22:07:58

This was covered on that Sarah Beeny thing this week ("double the house for half the money" - or similar title). It'll still be on 4OD. Should make interesting watching....

catanator Sun 01-Sep-13 21:25:42

Hi all, going through a similar challenge. We are trying to reduce the sound in our bedroom from a nearby busy road.

We have definitely decided to go for secondary glazing with 6.8m standip glass and will be refurbishing the current single glazed sash window.

However, we are really keen to make as quiet as possible. Therefore we are considering also having the sashes double glazed (that is in addition to the secondary glazing).

Has anyone done this or have a view on if it is worth it?

Sausagedog27 Wed 06-Mar-13 20:09:47

Phew- that was the right choice op!

MinimalistMommi Wed 06-Mar-13 17:59:03

Well, thank you PigletJohn, on phone to company this afternoon, we're going for secondary glazing with 6.4mm standip silence glass with a gap of 100mm ( Not 150mm as previously thought) They said 150mm will simply stick out way to far and will not be discreet enough.

I'm happy to update this incase any mumsnetters do a search on secondary glazing and wants to know how we got on.

Thank you for seeing me through my wobble this afternoon PigletJohn thanks

Way,way down the line we might think about refurbishing our sash windows to bring them up to their best again.

PigletJohn Wed 06-Mar-13 15:15:43

yep, secondary glazing with thick glass is best for sound reduction.

It will also stop draughts and cut heat loss.

MinimalistMommi Wed 06-Mar-13 14:16:31

Gosh, that was a long sentence I used there, sorry blush

MinimalistMommi Wed 06-Mar-13 14:15:41

You're right, that is what I had decided a couple of weeks ago and is what we will probably go ahead with. But with secondary glazing being bulkier of the two options (we're having 150mm gap between primary glass and secondary glass)
I was worried about it intruding into the room rather a lot so when I read that paragraph about the Stadip silence double glazing it had me worried we were making the wrong choice as the DG unit would be the most discreet, plus our sash windows could do with refurbish to look really good so I didn't know if we were better off starting all over again to get a really smart finish (I know that's really bad to say about original sash windows blush I guess I just want to get everything as 'right' as possible even if it means spending a bit more.

But, absolutely, it is noise reduction we're after here _above everything_else so what you say about secondary glazing making the biggest difference has me feeling more positive!

PigletJohn Wed 06-Mar-13 13:15:47

I don't doubt it will make a difference, but nowhere near as big a difference as putting in the secondary glazing.

I thought you had decided to keep your original wooden windows and add secondary glazing? That will be effective and the best-value option.

MinimalistMommi Wed 06-Mar-13 12:13:47

I genuinely don't think they're trying to upsell , they seem like a really good company which feels unusual in this day and age.

You said that secondary glazing would be much better then DG units without secondary glazing, what about if two panes of the STADIP SILENCE glass was used in the DG unit? It was the last line of that quote I wrote out that had me worried about making the wrong choice.

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