Diy Outdoor Fireplace With Cinder Blocks

DIY Outdoor Fireplace with Cinder Blocks: A Step-by-Step Guide

Transform your backyard into a cozy sanctuary with a custom-built outdoor fireplace. Using cinder blocks, you can create a durable and visually appealing focal point for family gatherings and intimate evenings. Follow these comprehensive instructions to construct your own DIY cinder block fireplace with ease.

Materials you'll need:

- Cinder blocks - Mortar mix - Gravel - Compacted sand - Rebar - Chimney flue - Chimney cap - Firebricks - Fire grate - Reinforcement mesh - Level - Trowel - Safety glasses - Gloves

Step 1: Prepare the Base

Begin by clearing the desired area and digging a level base approximately 6 inches deep. Fill the base with gravel and compact it to create a solid foundation. Next, lay a layer of compacted sand on top of the gravel for added stability.

Step 2: Build the Base and Firebox

Start building the first layer of cinder blocks in a rectangular shape, ensuring they are level. Use mortar to secure the blocks together. Continue stacking cinder blocks for the firebox walls, leaving an opening for the chimney flue at the back.

Step 3: Reinforce and Form the Walls

To strengthen the walls, insert rebar vertically into the mortar joints and secure it with reinforcement mesh. This provides support and prevents the walls from cracking. Continue stacking cinder blocks to the desired height, leaving a space for the fire grate at the base.

Step 4: Install the Chimney Flue and Cap

Insert the chimney flue into the opening left in the back wall and secure it with mortar. Cap the chimney flue with a chimney cap to prevent rain and debris from entering. The cap should have a rain guard to divert water away from the flue.

Step 5: Line the Firebox and Install the Fire Grate

Lay firebricks along the bottom of the firebox to create a protective layer for the cinder blocks. Set the fire grate on top of the firebricks to provide a platform for burning wood.

Step 6: Complete the Fireplace

Finish building the walls around the firebox and chimney. Add decorative elements or a mantelpiece to enhance the aesthetics. Allow the mortar to fully cure before lighting the first fire in your new outdoor fireplace.

Tips for Success:

- Use a 2:1 mortar mix ratio (2 parts sand to 1 part cement). - Keep the cinder blocks moist before applying mortar. - Use a level to ensure the walls are straight. - Allow the mortar to cure for several days before using the fireplace. - Regularly clean the firebox and chimney to prevent creosote buildup. - Always practice fire safety precautions.