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27th September 2013, 08:50 PM #1
A bit of rockwool vs lots of glasswool for soundproofing
I have been researching insulation/soundproofing for a few days now and it is doing my head in, Rw, Rw/Ctr etc....
We are putting in a new first floor which will be above our existing ground floor ceiling, there will be 290mm between the existing ceiling and the new floor. We will have a bathroom and two bedrooms on the new floor. I want to put some insulation in to block some of the sounds from the kids rooms coming downstairs through the ceiling.
So far I know that rockwool is by far the best option for blocking sound, if I go with rockwool the R2.5 batts are 88mm high so I will still have a void of 210mm in there, will sound echo around inside the void? Will this be an issue?
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The other option which works out cheaper than rockwool is to fill the complete 290mm void with cheap glasswool. I know glasswool isn't as good as rockwool at blocking sound but if you you have 290mm of it, it is better than 88mm of rockwool?
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It's really hard to know what to do, anything with the word sound or acoustic in the product name automatically means it costs 4 times the price.
Any ideas?
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