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Damp Proofing

Damp kitchen floor - dug up concrete and earth below is damp - what are the next steps?

Anonymous user 01/03/2024 - 2.49 PM

Hi have dug up the concrete in my small kitchen and I don't know what to do next. The earth below is damp and I doubt if there is any DPM underneath (house is 1900's) Any suggestions welcome! If I lay the DPM Membrane, does it have to come up the walls all the way to accommodate all the layers? Sand, Kingspan and concrete etc?

Are you a tradesperson and able to answer this question?

1 Answer

Trident Damp

Rating: 5 out of 5

Sidcup

Hi there You need to make sure you have enough depth, about 12 inches first blind sand over the area, then lay the DPM membrane so that it will overlap the walls to the top of the finished floor on this, place some kingspan 4 inch for insulation. Onto this, pour the concrete mix 4 inches, leave around 3 inches for the top screed to level out the floor, you can google laying a concrete floor for more detailed info. The membrane has to go up the wall past all the layers and overlap then you can cut off excess with a knife. Regards Joseph

Answered5 December 2013