703

Hi I left a post about this in the acoustics section but nobody answered So I'll try my luck here. What I want to know is if the product 'Drainboard' made by Roxul would be a good equivilent for 703 or 705? Check it out here http://www.roxul.com/sw17020.asp it has a density of 8lbs per cubic foot

It looks to me that this is what we call Rockwool which can be used where 703 is not available. It is excellent as a inwall insulation but can also be used on the wall for treatment. I'm sorry I don't have the time to download the tech info (9meg file!) so I can't check it's absorption figures. Maybe you have the time?? It's only drawback I see is it's only 1 1/2" (40mm) thick. cheers john