The house is 13 years old and has a concrete floor.
As part of a kitchen renew have recently lifted ceramic tiles and in one of the doorways (2 external doors) in line with the cavity/inner skin of the wall the concrete under the tiles was damp (Looked dark and colour lightened over the next day - August), the rest of the floor was fine.
My assumption ( I have not started digging concrete out and would prefer not to) is that the builders have not got the damp proof membrane in the right place leading to the damp that was unable to evaporate through the tiles.
We are laying a laminate floor so I need to deal with the damp and intend to treat both in the same way although only one showed the problem.
Will a simple paint on membrane work (e.g. http://www.wickes.co.uk/Wickes-Bitumen-Based-Damp-Proof-Membrame-Liquid-5L/p/241217) or does it need something else? Am assuming that I will need to find the edge of the existing membrane and seal to it.
Comments?
As part of a kitchen renew have recently lifted ceramic tiles and in one of the doorways (2 external doors) in line with the cavity/inner skin of the wall the concrete under the tiles was damp (Looked dark and colour lightened over the next day - August), the rest of the floor was fine.
My assumption ( I have not started digging concrete out and would prefer not to) is that the builders have not got the damp proof membrane in the right place leading to the damp that was unable to evaporate through the tiles.
We are laying a laminate floor so I need to deal with the damp and intend to treat both in the same way although only one showed the problem.
Will a simple paint on membrane work (e.g. http://www.wickes.co.uk/Wickes-Bitumen-Based-Damp-Proof-Membrame-Liquid-5L/p/241217) or does it need something else? Am assuming that I will need to find the edge of the existing membrane and seal to it.
Comments?