Get block, cap and gravel in one list. Use it for planning, and speak to an engineer before building a tall or loaded wall.
How it works
Rows come from height ÷ block height. Blocks per row come from length ÷ block length. Gravel covers a base trench and drainage behind the wall.
Before you order
- Bury the first row so the wall is anchored.
- Include drainage. Trapped water is a leading reason walls fail.
- Check local permit rules, often triggered around 3 to 4 feet.
Common questions
Do I need a permit for a retaining wall?
It depends on where you live and the wall height. Ask your local building department.
How much gravel goes behind a retaining wall?
A common plan is a zone about 12 inches wide behind the wall.