Plywood subfloor

[morg]

Hi, looking for some help please,

I'm planning on battening/levelling a concrete floor with 20mm battens at 400mm centres.

Then lay the ply over this, I'm thinking I can get away with 12mm CDX ply or do you think this is not thick enough?

The finished floor is 6mm LVT click together.

Thanks for any advice

 

[dazlight]

Does the concrete screed have a damp proof membrane under it ?

 

[morg]

Hi,
It's the original concrete slab (1960s) quite dry actually no damp,

I've not laid any screed... But looks like I need to pour some 50mm concrete/ballast in some areas.

After that, I am planning on installing a liquid dpm (blackjack) before laying the battens.

Anyways I think my best best is to go for 18mm T&G chipboard (as the CDX ply isn't T&G and would need extra battens at the joints)

Cheers

 

[dazlight]

As long as you are laying a liquid dpm before the battens it will be fine.

 

[morg]

Yes, all the ground floor will be blackjacked before battening

Cheers for the help