Fermacell flooring boards on top of WBP ply

10 Aug 2007
Reaction score
United Kingdom
Starting with bare joists, I want to lay down boards of 8' x 4' WBP ply. On top of this I plan to lay a floating floor of 'fermacell flooring boards'. My choice of fermacell is to achieve sound insulation from the noisy flat below. I'll probably put dense mats between the joists as well.

My problem is that the combined layers of WBP ply and fermacell make the overall flooring too thick. [ 18mm ply + 20mm fermacell ]

The next thickness down from 18mm ply seems to be 12mm.

Can I use 12mm ply as flooring instead of the 18mm?
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local