damp, where is my damp course

bernlyn

i live in 1930 house and i removed the plaster on the inside wall because it had started to came away. i replastered it then 2 months back i lifted the laminated flooring and all semmed fine. about 3 weeks ago i noticed damp running along where the floor meets the wall and now my plaster is mouldy and the damp patch has now got even biggeron the floor and is starting to go up the wall. the guttering is good and the outside render seems fine.

i have paving slabs outside around the house so i lifted them but there seems to be a concrete kind of apron around the house which sticks out at ground level+- 300mm and is +-80mm thick. i dont know where or how to see where the damp course is to see if this is above it or not.

ariba10

The ground level outside the house needs to be at least 150 mm (6 ins) below the level of the floor inside.

If you cannot lower the outside level, cut a small valley or gutter a few inches wide to the required depth.