Found this when I was liftinf floorboard. It just crumbled with powder remains.
What can i do. What is a permanent solution to this. Very worried. The floorboard is at the corner by the party wall
//www.diynot.com/network/Bouba/albums/
Thank you for all advice.
What can i do. What is a permanent solution to this. Very worried. The floorboard is at the corner by the party wall
//www.diynot.com/network/Bouba/albums/
Thank you for all advice.