ᐅ What level of impact sound insulation is recommended for 8mm laminate flooring?

Created on: 18 Sep 2016 20:46
N
netti
Hello,

After a long search, we have decided on a laminate flooring that we like. It is 8mm (0.3 inches) thick laminate, classified as AC3 (commercial grade and suitable for heavy residential use, or something similar). Additionally, a vapor barrier foil of 0.2mm (0.008 inches) thickness will definitely be installed under the flooring. Installing this foil was recommended to us for the new build.

Now we are wondering about the ideal thickness for impact sound insulation. We are considering between 3mm (0.1 inches) and 5mm (0.2 inches). However, I am not sure if the difference is noticeable (no underfloor heating).

We would greatly appreciate any opinions.
N
netti
25 Sep 2016 15:51
Regarding the described vapor barrier, I’m still wondering whether it needs to be sealed up the walls or if it’s sufficient to just lay it on the floor? Anyone have an idea?
Neige25 Sep 2016 17:10
Yes, you should build something up on the walls.
N
netti
26 Sep 2016 20:49
Thanks! It’s really frustrating—some say you should build up on the walls, while others say no.

The worst thing I’ve heard is: No insulating on the walls because moisture will then get into the walls and cause mold in the new building?!?!?!
Neige26 Sep 2016 23:14
The vapor barrier is laid overlapping only on the floor and sealed with tape, and it is slightly extended up the wall without being fixed to it. This way, the floor essentially sits in a "tray." The purpose is to protect the floor from moisture coming from below. This is effectively achieved by extending the vapor barrier upwards along the sides.