How To Make A Concrete Outdoor Fireplace

By Della Gracia | April 23, 2021

How to Build an Outdoor Concrete Fireplace

Gather the necessary materials:

  • Concrete mix
  • Rebar
  • Fire-resistant bricks
  • Fireplace grate
  • Gravel or sand for the base
  • Wood for the formwork
  • Nails or screws
  • Safety gear (gloves, safety glasses, dust mask)

Prepare the site:

  • Choose a level spot away from trees or other structures.
  • Excavate a hole for the base that is twice the width of the fireplace and 6 inches deep.
  • Fill the hole with gravel or sand and compact it.

Build the formwork:

  • Cut the wood to the desired shape and size of the fireplace.
  • Assemble the formwork and secure it with nails or screws.
  • Make sure the formwork is level and square.

Place the rebar:

  • Cut the rebar into lengths that are twice the height of the fireplace.
  • Place the rebar vertically inside the formwork, spacing it evenly.
  • Tie the rebar together with wire or zip ties.

Mix and pour the concrete:

  • Follow the manufacturer's instructions to mix the concrete.
  • Pour the concrete into the formwork, filling it to the top.
  • Use a trowel to smooth the surface of the concrete.

Cure the concrete:

  • Cover the concrete with plastic and let it cure for at least 7 days.
  • During this time, keep the concrete moist by spraying it with water regularly.

Install the fireplace grate and fire-resistant bricks:

  • Once the concrete has cured, remove the formwork.
  • Place the fireplace grate on the bottom of the fireplace.
  • Line the sides of the fireplace with fire-resistant bricks.

Enjoy your new outdoor fireplace:

  • Light a fire in the fireplace and enjoy the warmth and ambiance.
  • Be sure to follow all safety precautions when using the fireplace.


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