We told guy to get 25mm screws for 1st layer he got 35mm..he went or there will do lolYou have to use the correct length screws so that you don't go through the board and resi bar into the joust, or that defeats the object of doing it. The bar hangs down forming a void of about half an inch between the joist and the back of the board. This acts like an acoustic cushion.
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Its a load of bolloxs in my opinion its just another salary for sum numpty to cum out with his sound testing kit..i know there's ment to be 3 different kind of sounds or sum s**t..i think them soundboards are s**t as well..ive parge coated a party wall in plenty of houses then dabbed soundboards on and I've still heard lads nxt door talking its a load of s**tWhat makes me laugh is you do all this then they Put a lost of holes in the ceiling for spot lights haha
f**k me mate ull be laughing all the way to the bank but then again the guy who gets ur price may also be laughing at ur price uve given lolthats cleared few things up. ive just priced for a res ceiling. didnt have a clue what i was pricing. i priced for.normal mf ceiling. so if its a case of a screw in a joist im.laughing