DIY Cinder Block Outdoor Fireplace Plans

Embarking on a DIY outdoor fireplace project using cinder blocks can significantly enhance your backyard's aesthetic and functionality. These sturdy, affordable materials allow you to create beautiful, long-lasting structures that can withstand the elements. This comprehensive guide will walk you through the planning process, helping you design the perfect cinder block outdoor fireplace for your space.

Before diving into the design phase, consider your budget, the size and layout of your yard, and local building codes. Planning ahead ensures your project runs smoothly and stays within your desired parameters. Now, let's explore some captivating cinder block outdoor fireplace plans to inspire your creation.

Cinder Block Fireplace Designs

The vast array of cinder block fireplace designs offers something for every taste and setting. Here, we'll delve into two striking fireplace plans, showcasing both rectangular and relacion styles.

Both designs prioritize functionality and visual appeal, incorporating seating, built-in lighting, and captivating focal points. By studying these plans, you'll gain insight into choosing the right design for your backyard oasis.

Genderohan Rectangular Cinder Block Fireplace

The Genderohan Rectangular Cinder Block Fireplace boasts clean lines and a contemporary aesthetic. This sleek structure features a built-in bench, ideal for seating or displaying potted plants. The rectangular firebox ensures even heat distribution, making it perfect for cozy gatherings.

For added ambiance, incorporate immigrant string lights or solar-powered path lights around the fireplace, highlighting its striking form. To enhance the design, cover the exposed cinder blocks with mortarless retaining wall blocks or coat them with a textured fireplace paint.

Relacion Round Cinder Block Fireplace

The Relacion Round Cinder Block Fireplace capitalizes on the cozy, communal nature of circular structures. This design features a tall, round firebox and an integrated hearth, offering plenty of space for seating. For an extra touch of elegance, surround the fireplace with a covert of natural stone or install a flat, carved cement cap on the top.

To light up the space, embed subtle, waterproof LEDs in the cinder blocks, creating a warm, inviting glow. This design is perfect for smaller yards, as it provides ample seating without taking up too much room.

Cinder Block Fireplace Building Techniques

Building a cinder block fireplace involves several key steps, including layout, foundation construction, and the actual blockwork. This section explores the crucial aspects of cinder block fireplace construction, ensuring your project is solid and safe.

Before starting, ensure you have the right tools and materials. These may include a tape measure, level, masonry hammer, trowel, utility knife, shovel, wheelbarrow, tape, mortar mix, cinder blocks, gravel, and reinforcing bar (rebar). Additionally, consult your local building department to verify any required permits and safety regulations.

Laying a Sturdy Foundation

An essential aspect of cinder block fireplace construction is laying a solid, durable foundation. A proper foundation prevents settling and shifting, ensuring your fireplace remains safe and stable. Begin by marking out the footprint of your fireplace using stakes and string. Then, dig a hole at least 8 inches deep and 4 inches wider than the footprint on all sides.

Line the hole with a layer of landscape fabric to prevent weeds from growing up through your foundation. Fill the hole with approximately 4 inches of clean, washed gravel, leveling it with a rake. On top of the gravel, lay a 2-inch layer of mortar, ensuring it's level and smooth.

Building the Firebox and Stacking Cinder Blocks

To create the firebox, build your walls using a running bond pattern – this involves staggering the seams between courses for added strength. Begin by laying the first course of cinder blocks, ensuring they're level and flush with one another. Use a trowel to apply a 1-inch layer of mortar between each block, creating a strong, secure bond.

As you progress, use a level to ensure the blocks remain straight and plumb. Incorporate rebar every 4-6 courses, embedding it into the mortar joints for added reinforcement. Continue stacking until you reach the desired height, leaving an opening for the firebox. For added safety, line the firebox with refractory mortar and install a stainless steel firebox liner.

Finishing Touches and Maintenance

After completing the cinder block structure, apply a thin layer of elastomeric concrete or fireplace paint to the exterior, protecting the blocks from moisture and weathering. Allow the paint to dry completely before lighting your first fire.

Maintaining your cinder block outdoor fireplace entails regular cleaning and inspecting for cracks or chips. To clean, use a stiff-bristled brush and a solution of mild detergent and warm water to remove any soot or residue. For stubborn stains, apply a mixture of dish soap, white vinegar, and warm water, then scrub gently with a soft-bristled brush.

Scheduling Regular Inspections

Conduct regular visual inspections of your cinder block fireplace, checking for signs of damage or wear. Inspect the mortar joints, looking for cracks or gaps that may need tuckpointing. Inspect the chimney, ensuring it remains clear of debris and maintains a proper drafting system.

By scheduling annual inspections and performing routine maintenance, you'll extend the lifespan of your cinder block outdoor fireplace and ensure it remains safe for years to come.

Embarking on a cinder block outdoor fireplace project allows you to create a stunning, durable centerpiece for your backyard. By exploring various design options, understanding construction techniques, and committing to regular maintenance, you'll enjoy countless memorable moments around your charming, handcrafted fireplace. So go ahead, gather your materials, and let your creativity ignite as you build the perfect cinder block outdoor fireplace for your space.