It's winter again and rainwater still collects on my flat roof due to it's bad tilt, Because of that the concrete absorbs a lot of that water into the second floors roof and it's really visible on the roof and the walls. I try to move the water to the gutter when I'm in the house but I don't have time to keep doing that.
My question is : Is there anyway to stop the concrete from absorbing this water, and what are the possible fixes to my my problem ?
and also is there any way to dry the water that got already in the walls ...etc ?