concrete roof

stingray_316

l have a outhouse with loo and tool shed and it has a concrete roof, it is leaking and getting worse. What is the best stuff to use on the roof.
Have any folks has the same [roblem what do you use/do.

ormus

how big is it?
if its smallish area, then thompsons sealer (from wickes BQ) will do it. and easy to DIY.
if its a large roof then id get a man in to asphalt it. my bedroom flat roof cost me 250 quid.

http://www.thompsonsweatherproofing.co.uk/

stingray_316

The size of the outbuilding is roughly 16x9 ft and it only leaks in 2 spots. Looking up from inside the outbuilding you can see the crack on one spot that runs the width of the building and the drips from a certain point along the crack, and the other spot is right in the corner and along the width of the edge.
l forgot to mention l scrapped up flaking sealing paint and cleaned.
This was done yestaday morning, then l put some Marley Waterproofing Quick Drying Roof Felt Primer on and a few hours later put on Marley Waterproofing Bitumen Paint MW686432 Black , finished doing this yestaday afternoon about 3.00 after doing all the concrete roof not just the spots leaking, and it said on the tin that it would be dry in 4 hours providing the temp is no lower than 5c:o. Anyway it was tacky dry by 9.00pm and by 11.00 last night it started raining:mad:
Went out this morning and it's still leaking in the same spots .
These cracks where water is still coming through need some good stuff to stop it coming through.
Would like to know best stuff to use as cheap as possible, or other methods to stop the leaks.........

ormus

for that size roof i would get a man in. make sure he uses the proper hot bitumen/asphalt.

stingray_316

Thanks for the info but l'm looking to do it myself cheaper ...

knowloads

Liquid Rubber by LeFarge. Hot melt will last about 6-10 yrs at best. LQR will last 25-30. Option EPDM over marine ply or glass fibre all do=able