If you want to know how to build outdoor fireplace, you start by planning your project and checking local building codes. Many homeowners want to learn how to build outdoor fireplace to create a cozy outdoor space.
You need to choose the right materials and a safe location before you begin. Experts say that if you have basic construction skills, you can usually complete how to build outdoor fireplace in about 1-2 weeks. You will find how to build outdoor fireplace rewarding, and you can achieve this project with the right preparation. Remember, how to build outdoor fireplace requires attention to safety, patience, and pride in your work.
Why Build an Outdoor Fireplace?
Adding an outdoor fireplace can transform your backyard into a year-round gathering spot. Many homeowners choose this feature for several reasons:
- Outdoor fireplaces rank among the top five decorative features desired by homebuyers, according to a survey by the National Association of Home Builders.
- This trend spans all age groups and income levels.
Fireplaces, both indoor and outdoor, can boost your home’s appeal and increase its selling price by up to 12%.
Outdoor fireplaces do more than add beauty. They extend your living space and make your yard usable during cooler months. Real estate studies show that outdoor amenities like fireplaces can increase property values by 10-20%. A well-designed outdoor fireplace installation can also make your home stand out in a competitive market.
Before You Start: Permits, Codes, and Safety Considerations
Before you begin, always check local codes and permit requirements. Different cities have unique rules:
City | Permit Requirement | Additional Regulations |
|---|---|---|
New York City | Permits required; clearance rules apply | Fire pits allowed in certain zones with restrictions |
Buffalo | Fires banned unless in fire-resistant appliances | No open fires outside specified appliances |
Yonkers | Permits required; size and clearance rules | Spark arrestor required; size limits |
Syracuse | Generally allowed; not inside structures or balconies | Must follow placement safety regulations |
Albany | Allowed with basic safety regulations | Maintain safe distance from structures and flammable materials |
You should develop a plan of action before starting construction. Select a safe, level location at least 10 feet from buildings. Gather essential materials such as concrete, cinder blocks, a fireplace insert, veneer, and masonry tools. Common materials include clay, stone, and brick, with costs ranging from $115 for clay to $20,000 for custom stone or brick designs. Outdoor fireplace kits offer a more affordable and manageable option for many DIYers.
Safety must come first. Wear protective gear, keep a fire extinguisher nearby, and never leave the fire unattended. Use long-handled tools and install a spark screen if needed. If you feel unsure about any step, consult a professional to ensure your outdoor fireplace meets all safety standards.
Build an Outdoor Fireplace: Step-by-Step Guide
Building an outdoor fireplace requires careful planning and attention to detail. This step-by-step guide will help you create a durable and attractive feature for your backyard. You will learn how to build an outdoor fireplace from the ground up, using cinderblock and other essential materials. Each phase focuses on safety, efficiency, and aesthetics.
Step 1: Prepare Foundation
Start by choosing a safe, open location for your outdoor fireplace. Place it at least 10 feet away from your home, trees, and other structures. Clear the area of debris and vegetation. Level the ground and tamp the soil to create a stable base. Spread a layer of gravel, at least five inches thick, to improve drainage and prevent shifting.
Dig the foundation area to a depth of seven inches. Add a compacted layer of all-purpose gravel or crushed stone, between four and eight inches thick. Make sure the base extends below the local frost line to prevent frost heave. Pour a high-strength concrete mix (4000 PSI) over the gravel base. Smooth the surface and allow it to cure fully before moving to the next step.
Tip: Consult local codes and your insurance policy before you begin. Proper site preparation ensures safety and durability for your outdoor fireplace.
Step 2: Build Your Fireplace Base
Once the foundation is set, you can build your fireplace base. Use cinderblock or concrete blocks for strength and insulation. Lay the cinderblocks layer by layer, checking that each row is level, square, and plumb. For larger fireplaces, consider a base with extra support to prevent movement over time.
Material | Heat Resistance | Strength and Durability | Insulation and Energy Efficiency | Cost Considerations |
|---|---|---|---|---|
Cinder Blocks | Moderate | Less durable | Better insulation | Generally more affordable |
Concrete Blocks | Superior | Highly durable | Moderate insulation | Typically more expensive |
Stack the cinderblock carefully, using leveling sand if needed. Secure each block with construction adhesive for added stability. Lay the cinderblocks with precision to ensure the structure remains solid. If you plan a custom design, consult a civil or landscape engineer for guidance.
Note: Lay the cinderblocks with a solid foundation from the start. This step is crucial for the long-term stability of your outdoor fireplace.
Step 3: Install Firebox & Insert
The firebox is the heart of your outdoor fireplace. Select a fireplace insert that matches your needs and style. Popular options include stainless steel, corten steel, fire pit liners, smokeless inserts, vented or ventless gas inserts, electric inserts, and wood-burning inserts. Each type offers unique benefits for performance and safety.
Type of Insert | Material | Performance Characteristics |
|---|---|---|
Stainless Steel | Stainless Steel | Durable, rust-resistant, versatile for cooking and entertaining. |
Corten Steel | Weathering Steel | Develops a protective patina, blends with natural surroundings, highly durable. |
Fire Pit Liners | Metal | Protects masonry from heat, prevents cracking and degradation. |
Smokeless Inserts | Dual-wall design | Reduces smoke, enhances airflow, provides a cleaner fire experience. |
Vented Gas Inserts | Gas | Realistic flame, efficient heating, requires proper venting. |
Ventless Gas Inserts | Gas | Easy installation, highly efficient, may produce moisture. |
Electric Inserts | Electric | Simple installation, low maintenance, safe for homes with children and pets. |
Wood-Burning Inserts | Wood | More efficient than open fireplaces, reduces emissions, traditional experience. |
Position the fireplace insert at the center of the base. Secure it with mortar, ensuring it sits level and stable. Build the walls around the firebox, layering bricks or stones and applying mortar between each. Allow each layer to set before adding the next. Attach the chimney or flue pipe to the top, making sure all connections are tight to prevent smoke issues.
Safety Alert: Keep the firebox at least 10 feet from flammable materials. Install a spark guard and chimney cap to contain embers and prevent debris blockage.
Step 4: Construct Chimney
A well-built chimney ensures proper ventilation and smoke control. Use cinderblock or masonry materials for durability. Maintain the same size throughout the chimney’s height for easier construction. Recommended chimney diameters are 15 inches for masonry and 12 to 14 inches for UL 103 metal. The minimum chimney height should be 24 inches, with a maximum between 16 feet 4 inches and 17 feet 9 inches.
Stack the cinderblock carefully, keeping everything level and square. Use wood boxes for safer access when building the chimney, rather than ladders. Add extra blocks as needed for larger fireplace models.
Tip: Consult a professional mason if you plan a tall or complex chimney. Proper construction prevents smoke problems and improves safety.
Step 5: Apply Veneer Finish
Choose a veneer finish that is both durable and weather-resistant. Manufactured stone veneer and natural stone veneer are excellent choices for outdoor fireplaces. Both options offer high heat resistance and can withstand harsh weather conditions.
Start with corner pieces to establish the outside edges. Use temporary shims to maintain consistent spacing between stones. Mix a fresh batch of Type S mortar to a creamy consistency. Lightly mist the back of each stone with water before applying mortar. Apply a half to three-quarter inch layer of mortar to the back of the stone for full coverage. Press the stone firmly against the scratch coat with a twisting motion to ensure good contact. Make sure a small amount of mortar oozes out around the edges for a strong bond.
Note: Avoid installing veneer during extreme temperatures or wet conditions. Use mortar designed for exterior applications and ensure proper drainage around the fireplace structure.
Step 6: Curing & First Use
Allow the mortar and concrete to cure fully before using your outdoor fireplace. This process usually takes several days. Once cured, you can enjoy your new feature safely.
When lighting your outdoor fireplace for the first time, use long-handle lighters or long reach matches. Build the fire at least 10 feet from your home or combustibles. Pay attention to wind direction and avoid lighting fires during windy conditions. Keep children and pets at least three feet away. Never use gasoline or toxic liquids to start or maintain the fire. Be ready to extinguish the fire quickly if needed.
Safety Reminder: Always stay aware of your surroundings. Responsible use ensures your outdoor fireplace remains a safe and enjoyable gathering spot.
By following this step-by-step guide, you can build an outdoor fireplace that is both functional and beautiful. Take pride in your work and enjoy the warmth and ambiance it brings to your outdoor space.
Common Mistakes to Avoid When Building an Outdoor Fireplace
When you build an outdoor fireplace, you must avoid frequent mistakes that can lead to safety hazards, increased cost, and long-term issues. Professional builders often see DIYers make the following errors:
Skipping permits and ignoring local codes can result in fines and costly modifications.
Choosing the wrong location may increase the risk of fire and raise your insurance cost.
Building on a poor foundation or base leads to structural instability and higher repair cost.
Using the wrong materials can compromise safety and drive up the cost of replacement.
Neglecting fire safety features, such as spark screens, exposes you to fire hazards and potential insurance cost increases.
Improper chimney design causes smoke problems and may require expensive fixes.
Ignoring maintenance and cleaning access can result in higher long-term cost due to repairs.
Overlooking seating and space planning affects comfort and may increase landscaping cost.
Attempting a DIY project without experience can escalate the cost if you need professional help.
Not planning for utility lines, such as gas or electricity, can lead to unexpected cost and safety risks.
Always use a sturdy, non-flammable base like stone or brick to prevent fire hazards. Keep your outdoor fireplace at least 10 feet away from your home and overhangs to reduce risk.
Regular maintenance is essential to control cost and ensure safety. You should install a chimney cap, apply waterproof sealant, and use UV-resistant covers. Clean your outdoor fireplace with mild soap and water, and get it professionally inspected yearly. Manage weed growth and check for insect infestations to avoid structural damage and additional cost.
Tip: Never leave your outdoor fireplace unattended. Always use a fireplace screen to protect against sparks, especially in windy conditions.
Conclusion: Enjoying Your Outdoor Gathering Space
You have now learned how to build an outdoor fireplace, from planning to the final touches. When you light your first fire, you create more than just warmth. You set the stage for memorable gatherings and peaceful moments in your backyard.
Outdoor fireplaces have become a top trend in home improvement. Many homeowners use them to transform their yards into inviting spaces for socializing. You add warmth, style, and functionality to your outdoor area. These features reflect a growing interest in enhancing outdoor living spaces.
Spending time by your new fireplace offers more than comfort. Studies and user testimonials show that outdoor fireplaces:
Create a calming environment that improves mental well-being.
Lower stress levels, with just 15 minutes by the fire reducing cortisol.
Serve as natural gathering places, deepening relationships and fostering social connections.
Encourage storytelling and meaningful conversations, especially when you put away digital distractions.
Promote relaxation, lower blood pressure, and help you feel more present.
Tip: Invite friends or family to share stories around the fire. You will notice how the gentle glow encourages laughter, dialogue, and connection.
Remember to follow safety guidelines and local codes every time you use your fireplace. Regular maintenance keeps your gathering space safe and beautiful. Take pride in your accomplishment. You have created a space that brings people together and supports well-being for years to come.
You can build an outdoor fireplace by following each step with care. Focus on planning, safety, and quality materials.
Choose a safe location and keep a buffer zone.
- Use a spark arrestor and maintain your fireplace.
Always check local codes:
Requirement Type | Details |
|---|---|
| Distance from Homes | At least 10 feet away |
| Permits | May be required by your local fire department |
Enjoy your new outdoor space responsibly and take pride in your accomplishment!
