damp in my living room

jillyjacks

can I ask some advice please....9 years ago i had a damp course injected into my walls, recently I have noticed mould on the walls, further investigation revealed a damp concrete floor and a mouldy carpet in the corner. I got the original damp course bloke back and he has said that it isnt rising damp its a damp floor or condensation which isnt covered under his guarantee. he also said that because I have had the room replastered since the damp course was put in i have invalidated his guarantee because i didnt tell him i was doing it....is this right?? I am going to get another firm in to look at it and give an unbiased opinion but i was just wondering if his comment about the replastering is correct

thanks

phill99

I think his comment is almost irrelevant.

You need to ascertain what kind of damp it is. You are making an assumption that it is rising damp. What are the symtoms? If the plaster is crumbly and showinf signs of 'salting' and there are brownish wavey lines along the wall, then its likely to be rising damp. If it is just black spore, then its likely to be condensation.

Is the spot where you fopund it on an outside wall? Is it behind furniture?

jillyjacks

inside wall.....plaster is crumbly, paint is flaking off the walls no brownish lines that I can see, its behind a small unit.....but also damp in another corner oposite side of the chimney breast....no black mould just a half moon shape rising up from the skirting board...his measure thing showed the wall was damp there...no furniture in front of that patch

Leif

If you've read around about rising damp, then the chances are that first time around your house did not have rising damp, and what you are seeing is the original damp problem, possibly penetrating damp.

Whatever the truth, get an independent specialist in, one who does not sell damp proofing treatment. That way he has no vested interest in any particular diagnosis.

nickj_2

what condition are the exterior walls like , is there any signs of damp there , if so it could be something simple like blocked gutering or downpipe ,

Fire_Fox

Why did you have the damp proof course done, did your surveyor advise you there was rising damp? Is this an internal or external wall? What is the other side of the wall, is anything breaching the damp course, is there a leaky gutter or blocked drain? When you had the wall plastered, was a gap left at the bottom next to the floor (you may need to remove the skirting board to check? What plaster was used and how long after the DPC did you have it plastered? Do you have a copy of the DPC warranty with the terms and conditions? Half moon shape of what, can you upload of photograph of the mould?

blossom385

What type of plaster did you use to re-plaster the walls. A damp proof course should always have a sand and cement render plaster (salt retardant plaster) if a lightweight 'Carlite' type plaster was used then this works 'against the dpc. May need re-plastering, but def worth looking outside to see if there is anything that could be causing the damp.