H
hello1979
I'm currently in the process of renovating a first floor flat. It's a 1980s build with a suspended floor on a concrete base which forms the ceiling of the flat below.
Upon pulling the floor up, I find the joists that the boards rest on lie directly on the concrete. All of the joists have a spongy kind of membrane stuck to the bottom of the joists.
Is this an older version of a barrier membrane, which is my first thought, or is it something else?
The floor as a whole
The joists are 55 x 60mm and the sponge is around 4mm.
If it is a membrane, will any modern equivalent do or is there a special kind for the joists?
Upon pulling the floor up, I find the joists that the boards rest on lie directly on the concrete. All of the joists have a spongy kind of membrane stuck to the bottom of the joists.
Untitled
- hello1979
- 1
Is this an older version of a barrier membrane, which is my first thought, or is it something else?
The floor as a whole
Untitled
- hello1979
- 1
The joists are 55 x 60mm and the sponge is around 4mm.
If it is a membrane, will any modern equivalent do or is there a special kind for the joists?