Create a luxurious backyard oasis with a DIY outdoor fireplace. This step-by-step guide walks you through planning, construction, and finishing touches to build an inviting fireplace that elevates your outdoor living space.

Let's get started!

How to build an outdoor fireplace?

Build a solid base and footing, construct the firebox with firebrick and refractory mortar, install a chimney system with liner and cap, add decorative facing like stone/brick veneer, and extend a non-combustible hearth area. Allow for proper curing before use.

 

 

Key Takeaways:

• Obtain necessary permits and follow local codes before starting
• Choose the right location with proper clearances and consider the smoke direction
• Select the size, style, and materials based on your needs and preferences
• Construct a solid foundation, firebox, chimney, and finishing elements properly
• Prioritize fire safety through clearances, maintenance, and proper fuel

 

Planning and Preparation

Obtain Necessary Permits and Follow Local Codes

Before you break ground, make sure to check with your local municipality about any permits required and building codes to follow. Regulations may cover everything from size and placement to chimney height. Better to dot all the i's and cross the t's upfront.

 

Choose the Right Location

Pick a level spot in your yard that allows for proper clearances from any structures, trees, or overhangs per fire safety guidelines. Consider summer breezes too - you don't want smoke constantly blowing toward your house or neighbor's property.

 

Decide on Size and Style

Traditional masonry fireplaces have a classic look but require more labor. Prefabricated or modular units make installation simpler in exchange for less customization. Think about how much space is available and what aesthetic you prefer.

 

Select Materials

For masonry fireplaces, you'll need fire brick, refractory mortar, a steel damper, and a chimney system. The facing can be stone, stucco, or your choice of decorative elements. Modular units have fewer required materials.

 

Tools and Equipment Needed

Have a mason's trowel, level, tape measure, five-gallon buckets, wheelbarrow, and protective gear like gloves and eyewear. A masonry saw makes cutting bricks easier. Arrange materials for easy access during construction.

With the right planning and preparation, your outdoor fireplace project is headed for success! Let me know if you need any clarification or have additional requirements for this section.

 

Building the Foundation

Excavate and Level the Area

A solid foundation is crucial for your outdoor fireplace's stability and longevity. First, mark out the area and excavate the ground to the desired depth, typically 6-12 inches deep.

Ensure the excavated area extends at least 6 inches beyond the planned fireplace footprint. Level and compact the soil using a hand tamper or plate compactor.

 

Build a Base and Footing

Once the area is prepped, construct a base of compacted gravel, typically 4-6 inches deep. This gravel base improves drainage and prevents settling.

Next, pour a concrete footing, extending at least 6 inches beyond the fireplace's planned perimeter. The footing should be at least 12 inches wide and 6 inches deep.

 

Install Drainage (if needed)

If your outdoor fireplace will be located in an area prone to excessive moisture, consider installing a drainage system. One option is to dig a trench around the perimeter and fill it with gravel before laying the footing.

Install a perforated drain pipe to direct water away from the fireplace.

With a solid foundation in place, you're ready to start building the firebox itself. Take the time to ensure a level and sturdy base - it will pay off in the fireplace's structural integrity for years to come.

 

Constructing the Fire Box

Build the Fire Box Base

With your foundation in place, it's time to construct the firebox base. This will serve as the floor of your firebox where the fire will burn. Use high heat-resistant firebrick laid in a refractory mortar designed for high temperatures. The base should extend at least 16 inches in front of the firebox opening for a proper hearth.

Lay the First Course of Fire Bricks

Once the base is cured, it's time to build up the firebox walls. Start with the first course of fire-resistant bricks along the perimeter of the base.

Use a refractory mortar and lay each brick tightly against the next, ensuring a smooth, level surface.

 

Construct the Rear Wall

Build up the back wall of the firebox, laying each course of fire bricks in a staggered pattern for strength. The rear wall typically stands 24-36 inches high. As you build, use a level frequently to ensure everything remains plumb and even.

 

Build the Side Walls

From the rear corners, construct the side walls using the same staggered brick pattern and refractory mortar. The side walls angle inward slightly, creating a baffle to direct smoke up and out. Leave the front portion open as the firebox entrance.

 

Install the Smoke Chamber/Chimney

As the side walls near their planned height, start transitioning to the smoke chamber area above the firebox. Line this area with a heat-resistant material like fireplace liner panels or more firebrick. This will funnel smoke into the chimney system above.

With careful bricklaying technique, you've now constructed the heart of your outdoor fireplace - the durable, heat-resistant firebox where the magic happens. Next up? Installing that all-important chimney.

 

The Chimney and Flue

Importance of Proper Chimney Height

An outdoor fireplace chimney needs to be tall enough to create a sufficient draft and draw smoke up and away from your seating area.

Generally, the chimney should extend at least 3 feet above the highest point where it passes through the roof or nearby walls. Taller is better for improving airflow.

 

Flue Liners and Chimney Caps

Install an insulated flue liner system inside the chimney to protect the chimney materials and facilitate proper venting. The liner should be constructed of stainless steel or another high-heat material. Top the chimney with a cap to keep out rainfall, debris, and critters.

 

Install Chimney/Flue System

Follow the manufacturer's instructions carefully when assembling and installing your chimney components. The chimney should rest on a non-combustible base and be properly secured. Use the appropriate firestop spacing at any points where it passes through roof or floor assemblies.

A well-designed and installed chimney system is essential for efficient airflow and preventing hazards like interior smoke or structural fires. With a safe setup, you're ready for cozy fires!

 

Facing and Finishing Touches

Options for Veneers and Facing

With the structural components complete, it's time to add the decorative facing that gives your outdoor fireplace its final aesthetic appeal.

Popular options include brick, stone, stucco, or thin veneers designed to mimic various materials. Choose a style that complements your home's architecture and outdoor living space.

 

Build the Hearth Extension

Extend the non-combustible hearth area several feet out from the firebox opening using brick, slate, or concrete pavers. This safety buffer protects from embers and radiant heat. The hearth should be level and can optionally slope slightly away from the firebox for water drainage.

 

Install Damper and Fireplace Doors

For controllable airflow, install a damper in the firebox's smoke chamber area. Steel or cast iron fireplace doors not only look attractive but allow you to contain sparks and easily control the fire's intensity when desired.

 

Add Decorative Elements

Dress up the fireplace with architectural accents like mantels, arched openings, or custom designs sculpted from the facing materials. Incorporate decorative metal strapping, tile accents, or unique brick patterns. Let your creativity shine!

 

Safety Considerations

Clearances and Fire Safety

Always maintain proper clearances between your outdoor fireplace and any combustible materials or structures.

A minimum of 36 inches is recommended on all sides. Keep the area clear of flammable items during use. Have a water source and fire extinguisher nearby as precautions.

 

Chimney Maintenance and Cleaning

Inspect and clean your chimney annually to remove built-up soot and creosote. These residues are fire hazards if allowed to accumulate excessively. Consider installing a chimney cap with mesh sides to help prevent debris entry.

 

Proper Fuel Selection

Only burn seasoned hardwood logs or approved fire logs in your outdoor fireplace.

Avoid softwoods that cause excessive sparking, as well as glossy papers or treated woods which can release toxic fumes.

Prioritizing fire safety from setup to routine maintenance ensures you can enjoy your outdoor fireplace worry-free for years to come. A few simple precautions go a long way!

 

Curing the Fireplace

Before use, properly curing the firebox and chimney is critical. Follow any manufacturer instructions, which typically involve very gradually introducing small fires over time to avoid thermal shocking the new materials. Patient curing prevents cracking.

With stylish facing and those all-important final touches, your outdoor fireplace is now a showpiece! Enjoy many years of ambiance, entertaining, and making lasting memories.

If you think the process I have discussed is slightly complicated, you can simply get a ready-to-use outdoor fireplace on some of the popular sites like TheTorchGuys.

 

Frequently Asked Questions:

1. Can I use regular bricks instead of firebrick?

Regular brick can crack and deteriorate when exposed to the extreme heat of a fire. Firebrick is specially designed to withstand high temperatures, making it an essential material for constructing the firebox safely.

 

2. How much will building an outdoor fireplace cost?

Costs can range from $1,000 to $10,000+ depending on size, materials, labor, and added features. Budget around $3,000-$6,000 on average for a basic masonry fireplace using mid-range materials.

 

3. Do I need a permit to build an outdoor fireplace?

Most areas require permits for any permanent outdoor fire feature. Check with your local municipality regarding codes and regulations in your area before starting construction.

 

4. Can I use my outdoor fireplace in wet weather?

It's best to avoid using your fireplace during rainy conditions which can lead to smoky indoor air quality issues. Wait for dry weather to fully enjoy your outdoor fireplace.

Conclusion

You did it! By following the steps outlined here, you've created a beautiful outdoor fireplace that elevates your backyard space. From planning and securing permits to stacking the last decorative brick, your hard work paid off with a warm, inviting gathering spot.

Relax by the dancing flames, entertain friends and family, or simply bask in the cozy ambiance you built with your own hands. With proper installation and maintenance, your custom fireplace will provide endless enjoyment for years to come.

If at any point you feel uncomfortable tackling this major DIY project yourself, don't hesitate to hire an experienced mason or contractor. The most important thing is having a safe, well-constructed fireplace to enhance your outdoor living. Congratulations on your impressive new addition!