How to Build a Ring of Fire

Step 1. Outline the Fire Pit

Site the pit on a flat area about 12 feet in diameter. Place the stake at the center of your circle (ours is 56 inches in diameter), tape the spray-paint can to a string attached to the stake, and mark a circle.

Step 2. Create a Level Base

Dig out the dirt within the circle to about 18 inches deep, creating a level, reasonably flat circle. Fill the pit with 6 inches of gravel. Rake smooth and tamp after each load to make a solid base. Over the gravel, spread a layer of coarse sand, tamping and leveling as you go.

Step 3. Mark Inner Circle

Use the stake, string, and paint to mark an inner circle guide for placing the first layer of retaining-wall units. Our inner circle is 38 inches in diameter. If you’re using a fire ring for your firepit, place it in line with the painted circle.

Step 4. Place First Row

Place the first row of retaining-wall units in a circle. Use the mallet to set them in the sand and gravel. Check that it’s level from side to side and front to back after you place each unit.

Step 5. Finish Rows

Add the second row of retaining-wall units. Many pavers feature a groove on the bottom and a ridge on top, allowing the rows to interlock. Continue adding rows of blocks to reach the desired height. Add the top row of blocks and glue in place with concrete adhesive. Make sure the blocks are clean and dry before you apply the adhesive.

You can also use flat, finishing pavers on top of the regular pavers for a sleek, professional look. Adhere them to the top row as you did on the rows below.

Step 6. Install Ground Pavers (Optional)

To surround the firepit with pavers, create a 6-inch gravel base topped with 1 inch of coarse concrete sand. Lay the pavers in the pattern of your choice. After the pavers are in place, install a plastic or aluminum-edge restraint. Sweep concrete sand into the joints until the points are full. Compact the surface with a hand compactor or rent a plate contractor.