PATIO DRAINAGE SYSTEMS FOR EXISTING CONCRETE

PATIO DRAINAGE SYSTEMS FOR EXISTING CONCRETE

What are the solutions for existing patios?

If you have an existing concrete patio that does not have a drainage system, it's not too late to install one. Where the water tends to collect, cut out a sloping channel in the concrete to direct the water away, filling it with decorative stone or gravel.

Instead of gravel, you can also have a trench or channel drain made of metal installed. These drains are typically just a few inches wide and allow water to pass through, but keep out debris. They are installed flush with the surrounding patio so they won't be a triping hazard.

A more radical yet effective solution is to reestablish the pitch of the patio slab by installing a cement-based overlay. On this project, the pitch of the patio was corrected by installing an overlay ranging from 4 inches down to under an inch. The overlay was placed in sections separated by integrally colored borders to add decorative interest

https://www.concretenetwork.com/concrete-patio/drainage.html