They are really good After trying 2-3 companies to fix our leakage problem I started to think there is no good company in the market that can help us get rid of messy leakage problem. But then, my colleague suggested me to try Dema waterproofing company, I subsequently called them and told them about the problem. They came over timely and fixed all the leakage, i was not sure whether this is going to be a permanent fix or just a short term just like the other companies did. It's already been 2 years now, things are still looking great! So, i am totally satisfied and will recommend them to everyone!