Suspended flooring question

[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.

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• hello1979
• 10 Sep 2013
• 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

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• hello1979
• 10 Sep 2013
• 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?

 

[pinenot]

There called Proctor battens and are a propriety acoustic floating floor system. They are available at most builders merchants, Jewsons, Travis Perkins and the like...pinenot

 

[hello1979]

There called Proctor battens and are a propriety acoustic floating floor system. They are available at most builders merchants, Jewsons, Travis Perkins and the like...pinenot

How much does the foam reduce by when there's pressure on? The only ones I can find are 15mm bigger than the ones I need

The wood alone is 55mm width and 60 mm deep

 

[chickenlips]

Proctor is just a brand of acoustic battens, there are many forms available at a range of different sizes.

I wouldnt worry to much about the width, it would be the depth that is crucial.