If you have a look t some of the houses in portmore you will see the steel protruding from the roofs.
Concrete slab roof leaking.
Concrete cannot be the top layer of any roof.
When there are leaks in a flat concrete roof the fast fix is usually to apply some kind of sealant or waterproof cement at the site of the leak.
It must be under slope.
Roof penetrations are found on many flat concrete slab roofs.
No water isn t going to soak up like a sponge but concrete does allow water to seep through when there is enough.
A 10 to 15 cm thick slab of reinforced concrete with a thin 2 to 5 cm thick layer of cement on the top.
You have a rock hard concrete floor and it seems impervious to water intrusion.
Concrete also cracks and those cracks will be the first.
Most likely you have just a concrete slab and not roof system with layers of insulation what you should do is to cover concrete with metal sheet for example.
This cement layer is known as a screed and contrary to popular belief its purpose is not to waterproof the roof.
What is extremely important is that this metal sheet isn t horizontal.
Most concrete roofs follow a similar type of construction.
However concrete is porous.
Do waterproof your roof.