A patio must move water away from buildings and avoid trapping it at low points.

How to plan it
- Identify where runoff goes before setting grades
- Check door thresholds, drains, and adjacent soil levels
- Ask a local professional about slopes and drainage where conditions are complex
Check before buying: A material calculator cannot verify drainage safety.
Turn this into a quantity
Record your site measurements first. Then use a calculator with the depth, application rate, or coverage from the actual material specification.
Open paver base calculatorSource and limits
Concrete Masonry & Hardscapes Association: Paver technical guidance. Local conditions and manufacturer guidance may call for different materials or installation details.