Massive noise issues with new acoustic windows

[Billys]

Hi,

We live on a main road and have recently replaced our old aluminium windows with new UPVC along with the acoustic glass.

Since the new windows installation we are having massive issues with road noise. Window company is pointing this to be due to windows vents but i dont believe this to be the case.

Based on original order we did order acoustic window glass 36db U1.4 but we believe acoustic glass is not provided by the supplier.

I took the picture of window glass label. (Attached). Can anyone please help confirm if this glass is as per our original requirement (Acoustic 36db U 1.4)

Thanks.

 

[DAZB]

Try taping up the vents with some padding or a piece of foam or similar and a good strong tape and see if it makes a difference.

 

[Notch7]

Can anyone please help confirm if this glass is as per our original requirement (Acoustic 36db U 1.4)

The label shows 4mm low iron glass and 4mm soft coat

Acoustic glass is normally 6.8mm thick as it’s laminated glass with a plastic inter layer.

So no you’ve not got acoustic glass

 

[ronniecabers]

The label shows 4mm low iron glass and 4mm soft coat

Acoustic glass is normally 6.8mm thick as it’s laminated glass with a plastic inter layer.

So no you’ve not got acoustic glass

THIS!

Absolutely not acoustic glass according to that label.
Also the vents will be allowing noise in unless you have acoustic vents. Another thing to take into account is how well the rest of the house is acoustically sealed , for example if you have a chimney , noise will be coming in there too

 

[drives]

You should definitely be noticing the difference with acoustic glass. We had it installed in one of our previous houses and found it effective. Looking back at old quotes the laminate layer was 6.8 with 4mm inside. I'm sure there was some science behind having the inner and outer panes different thicknesses as well which reduced travel of sound.

 

[JohnD]

I'm sure there was some science behind having the inner and outer panes different thicknesses as well which reduced travel of sound.

The different thickness means the two panes have different resonant frequencies, so sound transmitted by one is not passed on by the other.

 

[JohnD]

Another point is that if you had new windows fitted, they are often deliver a loose, gappy fit to the hole in the wall so they go in easy with no trimming. The gap will be hidden with plastic architrave, but ought to be filled. At the least with expanding foam but I think some kind of non-resonant caulk.