Super Soundproofing Community Forum

Soundproofing Forum Topics => Soundproofing your Condo, Townhouse or Bed & Breakfast => Topic started by: fool_on_the_hill on May 20, 2012, 05:53:13 PM

Title: Soundproofing a floor with old floorboards and services underneath
Post by: fool_on_the_hill on May 20, 2012, 05:53:13 PM
Hi all. Newbie here, hoping to benefit from a more experienced opinion or two. I'll be sure to post an update after I've done the work (hopefully not in the "Soundproofing Jobs Gone Bad!" forum!).

I'm working out the best way to soundproof a floor to a neighbour below. Key facts are:

I was planning to put acoustic mineral wool under the floorboards, seal up the gaps with acoustic mastic/sealant, then put down soundproof mats followed by productised soundproof underlay available from a nearby company (basically a sandwich of two layers of very heavy soundproof matting bonded either side of a thick underlay).

Problems and questions are:

Thanks in advance for any help.
Title: Re: Soundproofing a floor with old floorboards and services underneath
Post by: Randy S on May 21, 2012, 09:53:10 PM
How high can you raise the floor?
Title: Re: Soundproofing a floor with old floorboards and services underneath
Post by: fool_on_the_hill on May 23, 2012, 09:15:03 PM
I don't mind losing a bit of height, but more than an inch or so might start to look odd. I was thinking of putting down a layer of plywood or cement-impregnated chipboard first and sealing that up instead of the floorboards. It would add on another quarter inch.
Title: Re: Soundproofing a floor with old floorboards and services underneath
Post by: Randy S on May 23, 2012, 10:11:58 PM
Ok, 1" might be enough to get a decent airborne sound reduction but might not be enough to reduce the impact footfall issue.

Absolutely fill all cavities with insulation and if sealing the gaps between floor boards is too much to accomplish than go ahead and use 1/2" cement board then seal all seams.

After this is finished we can assess how much more reduction you need.

You want to do this methodically so we add enough mass to get the reduction your looking for.