Recent content by Johnharold

I think I've found the cause of the damp. I've broken some blocks out of the floor to see whats going on underneath, and found stone, soil, and bits of plasterbord, which I've started to clear out. It's all very damp, and hardly any, some places no gap for air movement.It looks like soil...

Just pulled the floor and dpm up and found pools of water on top of the slurry a couple of mm deep, towards the middle of the floor and droplets elsewhere . The bottom of the walls look to be dry.

Yes, it's damp, it was actually a bit wet when I lifted the dpm this morning. I only saw bits of the construction, but I did see the blocks and beam. I thought the surface could puncture the dpm. So little/no ventilation through those slits, would they need to be replaced with air bricks...

No air bricks in the external walls, just these slots on two sides

The bumpy surface under the dpm must be the cement slurry,sorry, not the screed. The celotex is above, then the chipboard sitting on the celotex. The shower wet room is next door, but the damp is on the opposite side of the room. It was built about 6 years ago. Yes.

Hi Ivor, thanks for the reply. The soil level was below the dpc.I dug the French drain last year so it has been taking the water away, but I put some gutter along the bottom of the wall to stop water pooling there. I've only recently pulled the gravel back from the bottom of the wall. I've just...

Hi, thanks for the reply. es, there is celotex insulation over the dpm. I cut a piece out to get to the dpm. The skirting does seem damp, but the visible damp patches come through a day or two after rain, mostly away from the wall.

Couple more pics showing exterior walls

I think its beam and block then the rough screed in the photo, then the dpm, not entirely sure as I didn't see it being done. I'll get some more photos up tomorrow

Hi all, hoping to get some help with a damp problem with a flat roofed extension. The damp is coming up through the floor board. I think it is a beam and block construction. I cut a hole in the floor board to have a look and found the concrete under the dpm to be very rough, possibly puncturing...