When it rains my patio collects water in a couple of spots close to the wall of the house. The wall is now presenting external efflorescence and cracks of the external cement coating. (not sure if anything is wrong under that coating other than excessive humidity).
It is clear that I have to fix the draining for this patio but I don't know what is the best way to do it. Here are the options that I am considering:
- install a frech drain between patio and wall -the problem with this is that I need to discharge that drain somewhere. For that I might need to extend the french drain around another wall
- re-grade the patio by adding more sand under the areas where the water pools
- or by removing everything (gravel,sand, pavers) and re-grading the soil that is the base for the above layers
Which of the above would you recommend? Do you have any other ideas ?