In my bedroom i have a new Double Glazed window with one big pane and a quarter light and a bigger opener under that. I hate noise and i can hear the hum of the motorway / roads in the distance. Is there anything i can do to stop that noise? I have heard of secondary glazing but we only just changed these windows! (2 weeks ago) Toughened glass in windows. No slack in openings as far as i can see.
Wondering if it makes any difference when you pull the window shut even more tightly with your hand? Sure there aren't any gaps on the sides when fitted (between frame and wall)? All voids have been filled correctly etc.
Take the trim off around frame & foam any gaps between frame & wall, use a low expansion foam, did front window here made quite a difference.
Seems daff having to fit secondary glazing to solve a problem, prehaps you should have fitted tripple glazing. The problem has to be down to installation, any gaps between wall & frame should have been sealed, before plaster was made good. What about replacing glazed units with Pilkington Optiphon acoustic glass double glazing units.
The trouble of doing that though! I may do that though. Ta. This be good to seal gaps: http://www.screwfix.com/p/soudal-genius-insulation-foam-hand-held-750ml/25943
Among the best Soudal Expanding Foam in my opinion, I use the gun grade versions, but some do expand alot, so don't go overfilling otherwise you'll spend hours cleaning up & trimming back. And wear gloves using it, & moisten surfaces with a water sprayer prior to application.
This soundstage can be attenuated by having your double glazing different thicknesses of glass. So 4mm outer air gap and then 7mm would be what to go for. I did this for mine. The science is when sound hits the glass it resonates at a certain frequency and can transfer easier (ie louder) if the next pane is the same thickness. That's the starting point. If sound is still unacceptable, you look at secondary glazing.
Ps, double glazing as per the spec above is better at sound attenuation than triple glazing. Triple glazing better for heat retention.