How to Build a Fire Brick D105 Pizza Oven Kit - Part IV - The Floor Base

Published on July 7, 2025
Duration: 13:23

This guide details the process of laying the floor base for a fire brick pizza oven using refractory air-set mortar. It emphasizes proper mortar preparation, soaking refractory tiles, precise placement, and the use of a dead blow hammer for seating. Achieving flush and level joints is crucial for optimal oven performance and preventing dough from falling through.

Quick Summary

For a fire brick pizza oven floor, soak refractory tiles for 10-15 minutes before laying. Use a mortar mix of 2 parts air-set mortar, 2 parts wash sand, 1 part lime, and 1 part Portland cement, mixed to a sticky consistency. A dead blow hammer is essential for gently seating the tiles to achieve flush joints, as tight as a piece of paper.

Chapters

  1. 00:01Introduction to Oven Floor Construction
  2. 00:25Preparing Refractory Air-Set Mortar
  3. 01:36Soaking Refractory Tiles
  4. 02:16Mortar Application Thickness & Grooves
  5. 03:13Essential Tool: Dead Blow Hammer
  6. 04:03Aligning the First Tile
  7. 04:58Mixing Mortar to Consistency
  8. 06:53Laying the First Tiles
  9. 07:55Checking for Flushness and Level
  10. 08:37Importance of Starter Tiles
  11. 10:19Ensuring Smooth, Gap-Free Joints
  12. 11:25Reliance on the Starter Set
  13. 12:17Progress and Satisfaction
  14. 12:38Hardest Part: Initial Leveling
  15. 13:11Conclusion and Thanks

Frequently Asked Questions

What is the correct mortar mix for a fire brick pizza oven floor?

A recommended dry mix for refractory air-set mortar includes two parts air-set mortar, two parts wash sand, one part lime, and one part Portland cement. This is then mixed with water to a sticky consistency.

Why is it important to soak refractory bricks before laying them in a pizza oven?

Refractory bricks are very porous and will quickly absorb moisture from the mortar if not pre-soaked. This prevents the mortar from setting properly, leading to a weak bond and potential failure of the oven floor.

What tool is best for seating heavy fire bricks in mortar for an oven floor?

A dead blow hammer is the recommended tool for seating heavy fire bricks. Its shot-filled head provides inertia for gentle, effective tapping without damaging the bricks, unlike a rubber mallet.

How tight should the joints be between fire bricks on a pizza oven floor?

The joints should be as tight as possible, ideally as thin as the thickness of a piece of paper. This ensures a smooth surface for pizza peels and prevents dough from falling into gaps.

More Gunsmithing & DIY Videos You Might Like

More from GunBlue490

View all →