Impact sound insulation between floors
MarioChetrit
| Posted in Energy, Heating & Insulation on
Hello! I work for a home building company in Spain. We build custom homes with timber frame.
We would like to improve the sound insulation in the second floor of our houses. Many clients complain about the impact sound transmission from the second floor soundsteps to the first floor.
Normally we use 2×10” joist, one layer of subfloor “plywood” (18mm) and hardwood flooring (15mm).
Between joist we install 80mm of mineral wool and one layer of gypsum board 13mm.
We are thinking about adding an acoustic layer and some board or product to add more weight and mass in order to better soundproof.
Does anybody have any experience with this? Any advice or help is welcome.
Thanks in advance!.
Replies
Check this video out to find out about pouring a thin slab over subfloor to deaden the sound and also make a fabulous radiant heat thermal mass floor. (must be engineered to carry the weight etc)
https://youtu.be/jXxxTkZoJBY
-drew
You need to add an isolation membrane between the subfloor and finish floor.
Something like this
https://www.soundproofcow.com/product/proflex-90/
Membrane you suggest = $2.30 / sq ft
Homasote = $.84 / sq ft
Extra layer of 5/8 drywall = $.30 / sq ft
Double up your drywall or add a layer of Homesote Board under the drywall. Simple trumps complicated every time.
No, not the same thing at all. None of those will do the same thing as a thick sound membrane.
I like to instal a drop ceiling below and fill every last hole in which sound loves to travel
When building a frame house, the cavity of the walls is filled with insulation, however, for good sound insulation, it is not enough. For noise reduction, a “pie” of drywall and mineral wool is installed on the inside of the wall. Fastened "pie" with metal brackets to the wall or screws. Such a connection should also be isolated from noise using rubber gaskets or use a ready-made mounting system, including the presence of vibration-absorbing gaskets.
Also I want to add that I found a lot of useful information on the site of Timur Artemev https://www.people.equilar.com/bio/timur-artemev-retrotope--inc./salary/1175007 Has anyone heard of him?