I have a flat concrete roof about 2m by 1.5 and its leaking somewhere. I cleaned all the moss and other crap off yesterday and i can't find where the leak is. So I'm thinking it best to just waterproof the whole thing. The surface is really uneven and seems to be a concrete/small stone mix. There are a few ponds that may need evening out too.
My question is, whats the best way to waterproof it? Felt/Asphalt/Bitumen or some kind of liquid sealant that i can trowel/roller on? The surface is quite dusty and very rough so it may be a problem and i'm aware it may need priming first. It has a slight angle for run off and a groove cut in about 1" from the south side to catch water and direct it to an embedded drainpipe. I also have some mastic so seal it from the inside.
I've never done anything like this before but i don't really have and 'spare' money to pay someone to do it so any help would be most appreciated. Thanks guys. Great forum.
My question is, whats the best way to waterproof it? Felt/Asphalt/Bitumen or some kind of liquid sealant that i can trowel/roller on? The surface is quite dusty and very rough so it may be a problem and i'm aware it may need priming first. It has a slight angle for run off and a groove cut in about 1" from the south side to catch water and direct it to an embedded drainpipe. I also have some mastic so seal it from the inside.
I've never done anything like this before but i don't really have and 'spare' money to pay someone to do it so any help would be most appreciated. Thanks guys. Great forum.
You`ll need the primer on the dusty concrete - and I wouldn`t trust any " builder`s merchant" to have the primer in stock 