How To Build A Small Outdoor Fireplace

Building outdoor fireplaces requires a little bit more than just stacking a few rocks in a pit. While DIY outdoor fireplaces might seem fairly simple and straightforward, there are essential principles that need to be considered to create safe and functional fireplaces.

This guide will provide all the necessary information for building a small outdoor fireplace, including the materials needed, step-by-step instructions, and safety tips. By following these steps, you can enjoy a cozy and inviting outdoor space where you can relax and enjoy the company of friends and family.

Materials Required

The following materials are required for building a small outdoor fireplace:

Fire bricks or refractory bricks
Fireplace mortar
Concrete blocks
Gravel or crushed stone
Sand
Measuring tape
Level
Trowel
Grinder or brick saw (optional)

Step-by-Step Instructions

Prepare the base: Dig a hole approximately 12 inches deep and 24 inches wide. Fill the hole with gravel or crushed stone and compact it firmly.
Lay the first layer of concrete blocks: Place the first layer of concrete blocks on the gravel base. Use a level to ensure that the blocks are level and aligned.
Create the firebox: Using fire bricks or refractory bricks, build the firebox inside the concrete block frame. The firebox should be approximately 18 inches wide, 12 inches deep, and 12 inches high. Use fireplace mortar to bond the bricks together.
Add additional layers of concrete blocks: Continue adding layers of concrete blocks around the firebox, creating a raised hearth and a back wall. Use fireplace mortar to bond the blocks together and ensure that they are level and aligned.
Create the chimney: Using fire bricks or refractory bricks, build a chimney on top of the back wall of the fireplace. The chimney should be approximately 12 inches wide, 12 inches deep, and 24 inches high. Use fireplace mortar to bond the bricks together.
Finish the fireplace: Apply a thin layer of fireplace mortar over the entire surface of the fireplace, including the firebox, hearth, and chimney. Use a trowel to smooth out the mortar and give the fireplace a finished look.
Cure the fireplace: Allow the fireplace to cure for several days before using it. This will give the mortar time to harden and bond properly.

Safety Tips

Building and using an outdoor fireplace involves potential hazards. It's crucial to take the following safety tips into account:

Always build the fireplace on a level, non-combustible surface, such as concrete or gravel.
Keep the fireplace away from flammable materials, such as trees, shrubs, and wooden structures.
Never leave a fire unattended.
Use a fire starter or lighter fluid to light the fire. Never use gasoline or other flammable liquids.
Keep a fire extinguisher nearby in case of an emergency.

By following these steps and safety tips, you can build a small outdoor fireplace that will provide years of enjoyment and warmth.