Hi People, We have a newly built garage back in the summer image below. When winter came...rain came! Basically the under side of the roof started growing mould on it, we noticed the bricks were quite saturated with water It's a single skin built garage. So I did a bit of research online.... Found that TANKING was the solution. So we bought 2 buckets of KA Tanking Slurry. Applied the first coat (White) then within 24 hours the 2nd Coat (grey) and a 3rd coat to make sure. This was 3 weeks ago now.... We are still seeing water coming through. Some parts have dried, but we still have a lot of water beading on the bricks. Question is... Has it failed or was it no applied right? I'm at a loss. When I think it's started drying, and it's light grey. But after some rain it starts coming through again. The light grey bits are dry. But it's been nearly a month. Is this normal?