Building Outdoor Fireplace Using Concrete Cinder Blocks

Building an Outdoor Fireplace with Concrete Cinder Blocks: A Comprehensive Guide

An outdoor fireplace can be a beautiful and functional addition to any backyard or patio. If you're looking to build one yourself, using concrete cinder blocks is a great option. Cinder blocks are relatively inexpensive, easy to work with, and fire-resistant.

In this guide, we'll walk you through the steps on how to build an outdoor fireplace with concrete cinder blocks. We'll cover everything from choosing the right materials to finishing the fireplace with a decorative touch.

Materials You'll Need

Concrete cinder blocks
Firebrick
Mortar
Construction adhesive
Gravel
Sand
Rebar
Fire grate
Chimney cap

Step-by-Step Instructions

1. Choose a Location

The first step is to choose a location for your fireplace. Make sure it's in a safe area, away from any flammable materials. You'll also want to make sure it's in a place where you can enjoy it, such as near a seating area or patio.

2. Prepare the Base

Once you've chosen a location, you need to prepare the base. This involves digging a hole about 6 inches deep and filling it with gravel. The gravel will help to drain water away from the fireplace and prevent it from settling.

3. Lay the First Course

The first course of cinder blocks is the most important, as it will determine the level and stability of the rest of the fireplace. Start by laying down a bed of mortar, and then place the cinder blocks in place. Make sure the blocks are level and flush with each other.

4. Continue Laying Courses

Continue laying courses of cinder blocks, alternating the direction of the blocks each course. As you lay each course, apply a bead of mortar to the top of the previous course and to the sides of the blocks. Use a level to make sure each course is level.

5. Install the Firebrick

Once you've reached the desired height for the fireplace, it's time to install the firebrick. Firebrick is a type of brick that is specifically designed to withstand high temperatures. Place the firebrick in the bottom of the fireplace, and use mortar to secure it in place.

6. Install the Fire Grate

The fire grate is what will hold the wood in place. Place the fire grate on top of the firebrick, and secure it in place with construction adhesive.

7. Install the Chimney Cap

The chimney cap is what will keep rain and snow out of the fireplace. Place the chimney cap on top of the fireplace, and secure it in place with construction adhesive.

8. Finish the Fireplace

Once the fireplace is structurally sound, you can finish it with a decorative touch. You can paint the cinder blocks, add a veneer of stone or tile, or simply leave them as they are.

Building an outdoor fireplace with concrete cinder blocks is a relatively easy and inexpensive project. By following these steps, you can create a beautiful and functional addition to your backyard or patio.