Groundwork & Foundations

Thickness of suspended concrete slab under flat

Anonymous user 09/03/2024 - 3.02 PM

Hello – I live in a purpose built ground floor 1960’s flat with concrete floors. My concrete floors are damp in places in the bedroom and lounge. I have high humidity and a strong smell of damp in the lounge especially when it is cold and rains. I also get some black mould and as it is such a cold flat I will be drylining the walls eventually. The floors are suspended concrete and an inspection by an engineer recently when the foundations were exposed revealed that the suspended concrete floor under my flat was between 27 to 30cm and showed a surface crack and eventual chip in the surface of the slab. His inspection showed that the other flats had a concrete slab of 35.5 to 40.5cm. However he didn’t go on to comment as to whether my flat would be more affected by damp as a result of a thinner concrete slab. None of the other flats gets problems with damp concrete or high humidity. There is not a damp proof membrane under the concrete slab. Can anyone tell me please whether I am getting these problems because of the thinner concrete slab and no DPM. I know that nothing can be done about the size of the concrete slab but I am hoping that the management company might agree to do something internally for me on the floor. Thanks very much.