How To Build An Outdoor Fireplace With Cinder Blocks

How to Build an Outdoor Fireplace with Cinder Blocks

Building an outdoor fireplace with cinder blocks is a rewarding project that can enhance the ambiance and functionality of any backyard. Here's a comprehensive guide to help you create your own outdoor oasis:

Materials:

* Cinder blocks * Mortar mix * Masonry cement * Firebricks * Steel reinforcing rods (optional) * Gravel * Sand * Chimney flue * Chimney cap

Tools:

* Trowel * Level * Measuring tape * Circular saw * Angle grinder (optional) * Mortar mixer * Bucket * Rubber mallet

Step-by-Step Instructions:

1. Plan and Layout: * Choose a well-drained location and mark out the footprint of the fireplace. * Dig a hole for the foundation, which should be about 6 inches deep and 6 inches wider than the fireplace base. 2. Pour Foundation: * Fill the hole with a mixture of gravel and sand, compacting it thoroughly. * Create a concrete slab by mixing masonry cement and pouring it over the compacted fill. 3. Build Retaining Wall: * Lay a single layer of cinder blocks around the perimeter of the foundation, offsetting the corners. * Use a level to ensure the wall is straight and level. 4. Create Firebox: * Divide the interior space of the fireplace into the firebox and the exterior walls. * Line the firebox with firebricks, leaving a small gap between the bricks and the cinder block walls to allow for expansion. 5. Build Exterior Walls: * Continue stacking cinder blocks to build the exterior walls, using mortar to bond them together. * Reinforce the walls by inserting steel rods horizontally and vertically. 6. Create Chimney: * Cut an opening in the top of the fireplace for the chimney flue. * Install the chimney flue and secure it with mortar. 7. Add Chimney Cap: * Place a chimney cap on top of the flue to prevent rain and debris from entering the fireplace. 8. Cure and Finish: * Allow the mortar to cure for several days. * Apply a heat-resistant paint or sealant to protect the fireplace from the elements.

Tips:

* Use a bonding agent in the mortar to improve its adhesion. * Backfill around the fireplace with soil or gravel for support. * Consider adding a hearth for seating or a fire pit. * Always follow local building codes and safety regulations. Building an outdoor fireplace with cinder blocks is a project that requires careful planning and execution. By following these steps and adhering to the tips provided, you can create a durable and beautiful addition to your outdoor space that will provide warmth and enjoyment for years to come.