Browse Forums Windows & Doors 1 Jul 10, 2009 2:02 pm This is a follow up to my wifes thread: viewtopic.php?f=31&t=19597 Brief overview - We have noise issues from a road about 30m from the front entrance of our house. The road is raised above our house level by a few metres and it carries trucks to/from a landfill, quarry and it eventually leads to a motorway. We initially had double glazing in the front bedroom, ensuite and lounge as these are street exposed areas without fencing and the rest of the house is single glazing. The glaziers arrived with the wrong laminate to what we thought was agreed. They ended up installing 6.5mm vlam hush in place of the double glazing we had in the master bedroom and ensuite. I don't believe that the 6.5mm vlam hush has made any appreciable difference over the double glazing. Since then we have installed upvc shutters into the front bedroom, ensuite and lounge. The shutters do help a tiny bit but for me I am finding it unbearable to sleep in. The glazing company suggested a further test with 12.5mm vlam hush but we are not keen on this as it involves increased time, delays and cost for everyone. The glaziers then spoke to viridian who suggested that two layers of 6.5mm vlam hush with a 5mm air gap would be the best option given that we have 18mm spacings for double glazing. They suggested this was better than doing 6.5mm vlam with a (3 or 4mm?) standard glass pane and an air gap. The options are: 1.) 12.5mm vlam hush 2.) 6.5mm vlam hush + 5mm gap + 6.5mm vlam hush 3.) Put back the original double glazing units. I have some questions: 1.) I am a bit confused why Viridian would suggest 6.5mm/5mm/6.5mm over 6.5mm/7.5/4mm as I thought different pane thicknesses meant that each pane reduced the noise from different frequencies and that if both panes were the same thickness that the same frequency could pass through panes making it pointless to have double glazing. 2.) If the above is true then would it be better to have 12.5mm vlam hush on it's own. Would this stop more noise than 2x 6.5mm panes? 3.) Regarding the air gap... 5mm seems a little pointless... I have read that you need at least 50mm to 100mm to cope with traffic noise. 12mm to 18mm for heating properties. So is it really necessary or would sticking an extra 5mm pane of standard glass be an option and would that help? 4.) Finally - I have read about magnetite - a secondary window inside the main window... any views on this (as a later option)? I guess these are questions I will put to the glazing man too... Thanks for any help Re: Road noise problem- need advice - laminate glass 2Jul 10, 2009 4:03 pm The greatest difference comes form the total thickness of glass. The air gap makes little difference. We found that laminated glass makes a difference of 1 dB over the same thickness of clear glass. So I believe you when you say that you saw no difference between double glazed and laminated. I think your best bet would be secondary windows... that is another set of windows inside the existing windows. It's quite common as a solution. It really depends on your existing windows and how they can be accessed for ventilation. I would suggest PVC double glazed sliders inside the reveals of the existing windows with the double glazed units reinstated. Ed "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 I brought terry road box hill in June 2022 House was meant to be completed Nov 2023 That did not happen I had to chase them so much to the land Registration and… 0 2403 Nope, only on the inside, I've literally has my ears to the brick outside and can't hear anything. I can sort of 'reset' the noise by pressing firmly on the studs. This… 10 11693 Upgrading your windows to soundproof ones, like triple-glazed, can make a significant difference. While changing window… 4 11621 |