Hello all. Hope you're all well.

I'm building a RC slab and I've plans to make it into a green roof.





We've done this before in our barn back in Hull. We just applied a PU membrane and then built on top of it. 12 years with no issues

However, the weather conditions there are completely different to the intensity of the sun and variance in temperature in Malaysia.



We're not looking to waste money, but we're also not terribly tight with the wallet. We'd rather utilise the finances than having to redo this if it messes up.

The RC slab will be screeded to eliminate any ponding issues and will have a 1 degree angle across 8 meters of length. The edges will have drain channels to help drain off water as quickly as possible.

Any input from members who've actually had no issues with their RC slabs for would be highly highly appreciated.

Since you will be covering your slab with soil and grass, I would like to suggest if it is possible to put a layer of pvc, plastic or what so ever (material that will not rust) to further reduce the possibility of leaks through the slab. Basically to cover the slab before laying soil on it.

Reason being, repairing leaks on slabs covered with grass is more difficult than repairing naked slabs.

Do double protection so that the slab won't leak for a long time.

This post has been edited by Thrust: Aug 20 2024, 08:05 AM