Cinder Block Outdoor Fireplace Plans

## Cinder Block Outdoor Fireplace Plans: A Guide to Essential Elements

Building an outdoor cinder block fireplace can be a rewarding and cost-effective way to enjoy cozy evenings and memorable gatherings in your backyard. However, to ensure a functional and safe fireplace, it's crucial to consider essential elements during the planning process.

### Location and Safety

Choose a location that is at least 10 feet away from any structures or flammable materials. Consider prevailing winds and proximity to seating areas for optimal warmth distribution and smoke management.

### Base and Foundation

A solid base is vital for the fireplace's stability and heat resistance. Dig a 6-inch deep trench filled with gravel or crushed stone. Create a concrete slab or use pavers to provide a level and fireproof foundation.

### Firebox and Chimney

The firebox is the central chamber where the fire burns. Use heat-resistant firebricks (rated to at least 2000°F) to line the firebox walls and floor. Build a chimney with cinder blocks and mortar that is at least 6 feet high to allow smoke to escape.

### Cinder Block Walls

Cinder blocks are the primary building materials for the fireplace walls. Use standard 8" x 8" x 16" blocks and stagger the courses for added strength. Fill the voids with mortar and reinforce the corners with steel rods or rebar.

### Firebox Lintel

A lintel spans the opening of the firebox and supports the weight of the chimney above. Use a steel angle iron or a precast concrete lintel to create a sturdy and fireproof support.

### Cap and Crown

The cap tops the chimney and prevents rain and debris from entering. Build it with a slope to direct water away. The crown, located above the cap, enhances the chimney's appearance and helps disperse smoke.

### Mortar and Finishing

Use a high-temperature mortar specifically designed for outdoor fireplaces. Apply it in thin layers, ensuring all joints are filled and smooth. Paint or stain the finished fireplace to match your outdoor décor and protect it from the elements.

### Accessories and Safety Measures

Consider adding accessories to enhance the fireplace's functionality and safety, such as a spark screen, log grate, and ash bucket. Install a fire pit table nearby for comfortable seating and a convenient place to rest hot items.