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DIY Fire Pit: How to Build a Fire Pit | The Home Depot

FirepADM, April 20, 2025

Hey there! Looking to add a cozy gathering place in your backyard? Building a DIY fire pit is an easy afternoon project that can transform your outdoor space. Before you begin, it’s important to research the location, style, and shape of your fire pit. Make sure to choose a safe distance away from any structures or low-hanging trees and check your local building codes for any restrictions. The style and shape of your fire pit will determine the type of wall blocks you’ll need to purchase. Trapezoidal blocks work well for round fire pits, while rectangular blocks are great for square fire pits. Once you have all the materials, it’s time to prepare the site. Dig out the area for your fire pit, creating a depth of about 7 inches below grade. Pack the dirt solidly and add a generous amount of crushed gravel to create a sturdy base. After laying out the blocks, test fit the fire pit bowl and make adjustments as necessary. Finally, add construction adhesive to bond everything in place and complete the remaining rows. With your new fire pit built, you can now gather around and enjoy cozy evenings with friends and family. So go ahead, build that roaring fire and invite your neighbors over for some outdoor entertainment!

Researching the Location, Style, and Shape

Before you begin building your DIY fire pit, it’s important to research the location, style, and shape that will work best for your needs. Start by choosing a location that is a safe distance from any structures or low-hanging trees. It’s also a good idea to check your local building codes for any restrictions on fire pit installations.

The style and shape of your fire pit will determine the type of wall blocks you’ll need to purchase. For a round fire pit, trapezoidal blocks are recommended. These blocks are smaller on one side, allowing the edges to fit snugly together without creating any gaps. On the other hand, if you prefer a square fire pit, rectangular blocks can be used. With rectangular blocks, you can construct your fire pit in a variety of patterns using blocks of different dimensions.

At The Home Depot, you can find all the materials you need to build a fire pit. They offer complete kits with detailed instructions, which can be purchased online for added convenience.

Preparing the Site

Once you have chosen the location for your fire pit, it’s time to prepare the site. Start by driving a stake down the middle of where the center of your pit will be. Use marking paint tied to a string to draw a circle around the stake. Make sure the circle is slightly larger than the outside dimensions of the fire pit you plan to build.

Next, dig out the entire area for your fire pit, taking it down to a depth of about 7 inches below grade. Use a hand tamper to pack the dirt solidly all the way around. This will ensure a sturdy base for your fire pit.

DIY Fire Pit: How to Build a Fire Pit | The Home Depot

Building the Gravel Base

A solid gravel base is essential for the stability of your fire pit. Pour a generous amount of crushed gravel into the hole you’ve dug, making sure the finished base will be approximately 5 inches thick. Wet the gravel thoroughly with a garden hose and use the hand tamper to compact it into a hard layer a couple of inches below the surface. This will provide a solid foundation for your fire pit construction.

If you are building your fire pit as part of a new patio construction, where the crushed gravel base has already been laid, you can skip this step.

Laying Out the Fire Pit

Once the site is prepared and the gravel base is in place, it’s time to lay out your fire pit. Start by laying out the first course of blocks, making sure to snug them together and using a level to ensure the height stays consistent. If necessary, add leveling sand or tap down blocks to even things out.

After finishing the first row, check the base layer in several places with a long level to ensure the structure is even. Then, assemble the second level of wall blocks, making sure to stagger the joints between rows for added stability.

DIY Fire Pit: How to Build a Fire Pit | The Home Depot

Testing the Fit of the Bowl

Before proceeding further, it’s important to test the fit of the fire pit bowl. Bowls and insert rings come in standard sizes, so you’ll need to choose the right one for the fire pit you’re building. After completing the second row of blocks, test fit the fire pit bowl to make sure the lip rests fully on the edge. Adjust the positioning of the blocks if necessary to ensure a proper fit.

Adding Construction Adhesive

Once you have confirmed that the fire pit bowl fits properly, remove the second row of blocks and add beads of construction adhesive to the bottom layer. This will help bond everything in place and ensure the stability of your fire pit. Then, refit the blocks and continue the process for the next row.

Remember, a fire pit typically only has three or four rows of blocks. The bowl sits on top and can be easily removed for cleaning purposes.

DIY Fire Pit: How to Build a Fire Pit | The Home Depot

Choosing the Type of Wall Blocks

As mentioned earlier, the type of wall blocks you choose will depend on the style and shape of your fire pit. Trapezoidal blocks are recommended for round fire pits, while rectangular blocks can be used for square fire pits. It’s important to choose the right type and size of blocks to ensure a secure and visually appealing fire pit.

Digging the Area for the Fire Pit

The first step in preparing your fire pit is to dig out the area where it will be located. This involves digging down to a depth of about 7 inches below grade. By digging this deep, you’ll be creating a space that allows for proper airflow around the fire and helps to prevent the ground underneath from becoming charred.

DIY Fire Pit: How to Build a Fire Pit | The Home Depot

Packing the Dirt Solidly

After digging out the area for your fire pit, it’s important to pack the dirt solidly. Use a hand tamper to compress the dirt and create a firm base for your fire pit. This will help ensure that your fire pit remains stable and level over time.

Enjoying the Fire Pit

Once your fire pit is complete, it’s time to sit back, relax, and enjoy the warmth and ambiance it provides. Gather your friends and family, build a roaring fire, and create lasting memories around your DIY fire pit.

Remember to always follow proper safety precautions when using a fire pit, such as keeping a fire extinguisher nearby, never leaving the fire unattended, and ensuring the fire is completely extinguished before leaving the area.

Building a fire pit is a rewarding and enjoyable project that can enhance your outdoor living space. By following these steps and using the materials available at The Home Depot, you can create a beautiful and functional fire pit that will provide countless hours of relaxation and entertainment. So go ahead, gather your supplies, roll up your sleeves, and get ready to build your very own DIY fire pit.

DIY Fire Pit: How to Build a Fire Pit | The Home Depot

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