New floorboards directly on concrete floor

Eatshootsleaves

Hello, so I have a 90year old house with a bit of damp coming through the concrete floor, we've removed the old floorboards and skirting and planning on putting a liquid dpm on the concrete, my question is are we supposed to use a flexible epoxy glue to fix the new floorboards to the finished concrete, the original floorboards were nailed into the concrete, but I think that would compromise the dpm, if an epoxy glue is the way to go, does anyone have any recommendations of brands? Thanks

armchaireconomist

The damp is probably caused by the fact floorboards were nailed directly into concrete and subsequent lack of ventilation. You need to build a new (suspended) floor, or personally i'd stick a DPM down and screed the floor.

stator

Have you considered insulating your floor?


You lose a fair amount of heat through the floor and if you are re-doing the floor, it's worth considering insulation. Something like Jabfloor on top of the damp proof membrane, then a screed floor on top of that.

Eatshootsleaves

There's very little space it's just concrete with floorboards on top anything else would raise the height of the floor,this is something I haven't seen before and there's not a lot of information about it, most floors deals with suspended floors

stator

A solid concrete floor is quite common, but you don't normally lay floorboards on to it.


Do the floor boards even need fixing to the floor?

Could you put a layer of underlay and just have the tongue and groove floorboards on top of that?