ᐅ Carpet rolls on laminate flooring or directly on the screed (impact sound insulation)?

Hello everyone,

We want to cover the floor in one room entirely with wall-to-wall carpet from a roll. Currently, there is a standard, inexpensive laminate flooring in place, which is completely intact. The main reason for switching to carpet is sound insulation.

Now the question is, purely from a soundproofing perspective for the room below on the ground floor, does it make any difference whether the carpet is installed over the existing laminate or directly onto the screed floor?

Best regards

Hello questioner.
It makes no sense at all to install a textile floor covering over a laminate floor (which is planned anyway)!
On larger areas (not just 1.5 x 2m (5 x 6.5 ft)), the textile covering must be glued to the subfloor because otherwise, thermal changes and varying indoor humidity would cause the textile covering to expand or contract.
The result: waves and bumps in the textile layer.
You can actually avoid the consequences (emptying the room, removing the covering, and then reglueing).
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My professional advice is therefore: better don’t do it, remove the laminate floor, sand the subfloor, prime it, and have the textile covering glued down.
Good luck: KlaRa

We used the DIY Doctor double-sided extra-strong tape to fix a velour carpet onto laminate flooring in an 18 m² (194 sq ft) room. It works really well and can be removed without leaving any residue if you want to take the carpet out again. We have experienced no issues with waves or bubbles (the carpet has been down for 5 years now). However, I cannot say how it affects sound insulation.