I'm building a patio that's 12 feet long and 18 feet wide, with one side designed to be 10 feet tall and the other 9 feet tall. Is this enough slope for proper drainage? I really appreciate any tips or advice!
2 Answers
For proper drainage, you generally want about a 1/4 inch slope per foot of length. So, with your 12-foot patio, that would mean a total drop of about 3 inches from one end to the other. Your idea of having one post at 10 feet and the other at 9 feet gives you a total slope of 1 foot, which is definitely sufficient! Just make sure there's a place for the water to drain into.
I’d suggest getting some local advice too! It might be beneficial to check with contractors or DIY forums for specific examples of how to achieve that slope. I've seen some folks start with a small project first to build their skills before tackling something larger.