Hi- I had Sempatap put up on my bedroom wall about 18 months ago, I started noticing a damp smell and thought it was the old source rearing it’s ugly head…. I was told to check behind the paper - so I’ve cut a little square out and there appears to be black mould on it. I’ve told my landlord, who says this isn’t possible! Even suggested it was dust from when it was installed. Does anyone have any evidence either way?
