mould

Hi Any idea what would cause mould in this pattern? Perfect rectangular strips - the top seems to meet the damp proof course but i don't get why the straight sides and regular pattern all along the wall... edit: just the black square-looking/rectangular bits... that darker brown strip across...

I foolishly damaged a 3x4 area of my wall to wall carpet in my living room by washing it repeatedly and not letting it dry before I put a chair mat on it. I now think there is mould growing and various treatments I tried have not reduced the smell. There is some leftover carpet that I found...

Hi, I wonder if anyone can give me some advice- In our back living room, the wallpaper was peeling off the outside wall, so I pulled it all down and discovered mould. Some of it is black dots, and some is white- looks almost like the white ice you get inside freezers. The wall is very cold to...