How to deal with black mould on walls.

[dilz000]

can that stuff be tiled over mouldy?

 

[White Room]

I would'nt, the mould would probably creep thru to the grout

 

[dilz000]

ive never seen it before thats all. how about tanking?

 

[Scott]

The bleach wont kill the mould completely and it will come back. If you have a shower then its building regs to have extraction in the room anyway. As for cavity wall insulation, did you have the mould before?

Id be suprised if the mould would penetrate the grout joints as i have tiled some pretty minging bathrooms and its not happened yet.

 

[Qwerty]

I agree Scottley.... any mould would just set up a new home on top of new grout/ tiles if ventilation not sorted. Spores would not develop or penetrate through new grout

 

[faithhealer]

HG mould cleaner is excellent for removing mould but definitely need air movement

 

[doug boardley]

It is good stuff Faith, but as others have suggested, extractor fan is needed.

 

[jay]

external walls are only ones effected by mould this must indicate something that needs sorting first

 

[Deleted member 9966]

do you guys think that the cavity wall insulation could have started the problems here in this situation then?

I've been toying with the idea of cavity wall insulation in my house but I won't bother if it will start creating damp and mould.

 

[jay]

hard to say without seeing but sounds as if in this case there is an issue that needs attention cavity walls are fine if the outside wall is waterproof same goes with solid walls the aim is to keep moisture out on the outside not try to stop it on the inside

take care

jay