In an earlier contribution to this discussion,
wrote:

Just wondering how viable it is to take up a screed floor then fix
battens so I can fit floorboards.
The timber floor in my living room needs redoing. I don't fancy a
floating floor on top of the existing. There is however an extention
which is concrete.
I have been told in theory I should be able to break up the screed and
screw battens to the slab being careful not to penetrate the dpc but
how thick is the screed and the slab usually.

Kevin

Why not excavate a bit in a corner, and find out? You'll probably find that
the screed is a couple of inches thick - and the slab 4-6 inches. If you're
*very* unlucky, the DPC membrane will be between the slab and screed rather
than under the slab!
--
Cheers,
Set Square
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