How to Build a Pizza Oven Base: A Complete Step-by-Step Guide

The BrickWood method divides the hearth into three manageable reinforced sections. You cast them upside down on a flat surface, with a foam block creating the insulation recess. Once cured and flipped onto the stand, the recess faces up and becomes a continuous 2-inch thermal-break cavity.

1. Cut the rebar first. Prepare the lengths shown in your model plan and remove sharp burrs.
2. Build three rigid forms. Frame OSB or plywood with straight 2 × 6 lumber; square each form and brace it so wet concrete cannot bow the sides.
3. Cut the 2-inch EPS inserts. Size one centered foam insert for each form, leaving the plan-specified concrete border around it.
4. Bond foam-side-down. Use a compatible construction adhesive, weight the foam flat, and allow about 48 hours for the adhesive to cure.
5. Mark the first pour line. Draw a level line 2 inches below the top of each form.
6. Tie the rebar grids. Build one centered grid per slab so it can be lifted into place during the pour.

1. Excavate the plan footprint. Around 8 inches is typical in BrickWood plans, but model, soil, frost depth, and code determine the actual depth.
2. Compact the soil. Remove organic or loose material and establish a firm, even bearing surface.
3. Build and square the 2 × 6 form. Compare diagonals, level the boards, and use a model-specific drainage slope only if the plan calls for one.
4. Stake the form securely. Space stakes about 3–4 inches from the outside edge and keep every stake below the form’s top so the screed can pass.
5. Add crushed gravel. Fill the void with ¾–1 inch aggregate, compact it thoroughly, and dampen it before the pour.
6. Prepare the rebar grid. Tie it to the dimensions and spacing in your plan.
7. Pour in two lifts. Fill halfway, place the reinforcement at the specified depth, then finish the pour. Consolidate the edges and screed the surface.
8. Set the vertical bars. While the concrete is wet, insert four long rebar lengths near the corners about 10 inches deep. Cap all exposed ends.
9. Cure at least 4 days. Protect the slab longer in cool or damp conditions, then remove the form and backfill neatly.

1. Dry-lay the first course. Leave approximately ⅜-inch joint gaps, confirm the footprint, and trace the outside edges onto the foundation.
2. Relay the course in mortar. Bed every block with roughly ¼–⅜-inch joints on the bottom and ends—this is not a dry-stacked stand.
3. Build a running bond. Use half blocks to alternate the corners and stagger vertical joints from one course to the next.
4. Check every block two ways. Verify level front-to-back and side-to-side; check the wall for plumb and the stand for square as you rise.
5. Reinforce the vertical cores. Feed the long bars through the prescribed cores and fill those cores with concrete. Filling every core adds strength if your plan and budget allow.
6. Build to working height. Five courses is standard. Builders under about 5 feet 8 inches may prefer four; any finished base above 5 feet should be reviewed by a structural engineer.
7. Allow about 48 hours. Let the masonry cure before placing the heavy hearth panels.

1. Mark the centerlines. Find the stand’s center front-to-back and side-to-side so the assembled hearth lands evenly.
2. Spread mortar across the block tops. Create a continuous bedding layer without high spots.
3. Install the center slab first. Flip it so the 2-inch void faces up, align it to both center marks, and butter the panel edges.
4. Set the front and back slabs. Bring all three together and adjust until they read as one level, fully supported surface.
5. Fill the continuous recess. Choose the insulation method allowed by your model plan, then pack and screed it flush.

*Product instructions, weather, and thickness always control. Cover the finished insulation with plastic, weight the cover so wind cannot lift it, and wait for the specified cure.

This is BrickWood’s standard finishing method. Some model plans end at the insulated slab or specify additional floor details, so defer to the plan supplied for your oven whenever it differs.

1. Soak standard facing bricks. Choose the best-looking faces for the front edge.
2. Build the perimeter. Start along the back and work forward with consistent ⅜-inch joints, using the mortar specified by your plan.
3. Add the leveling bed. Spread 1–2 inches of all-purpose sand inside the perimeter and strike it flat.
4. Dry-lay genuine firebrick. Set the cooking-floor bricks in a true herringbone pattern with no mortar between them.
5. Level as you go. Adjust the sand and tap bricks gently with a rubber mallet so a peel can glide across the entire floor.
6. Cut clean perimeter pieces. Fit the edges without forcing the field out of pattern. Keep floor joints unmortared for serviceability.