Building Outdoor Fireplace Using Concrete Cinder Blocks

Building an Outdoor Fireplace Using Concrete Cinder Blocks

An outdoor fireplace can be a beautiful addition to any backyard. It provides a cozy place to gather with friends and family on cool evenings, and it can also be a focal point for your outdoor living space. If you're looking for a budget-friendly and relatively easy way to build an outdoor fireplace, concrete cinder blocks are a great option. They are readily available and relatively inexpensive, and they can be easily stacked to create a variety of designs.

Planning and Preparation

Before you start building your fireplace, it's important to plan and prepare the area. You'll need to choose a location that is level and stable, and you'll need to get the necessary permits from your local building department. You'll also need to consider the size and shape of your fireplace, and you'll need to gather all of the materials you'll need, including concrete cinder blocks, mortar mix, fire bricks, a firebox, a chimney, and a hearth.

Here are some tips for planning your fireplace:

Choose a location that is level and stable. The fireplace should be built on a solid foundation, and it should be at least 10 feet away from any flammable structures.
Consider the size and shape of your fireplace. The size of your fireplace will depend on how much space you have available, and how many people you plan to accommodate. The shape of your fireplace can be as simple or as elaborate as you like.
Gather all of the materials you'll need. You'll need concrete cinder blocks, mortar mix, fire bricks, a firebox, and a chimney. You may also need a hearth, a mantel, and other decorative elements.

Construction of the Fireplace

Once you have your materials and the construction area is prepared, you can start building the fireplace. The following steps outline the process:

Lay the foundation. The foundation should be at least 4 inches thick and should be made of concrete. The foundation should be level and should extend at least 6 inches beyond the perimeter of the fireplace.
Build the base. The base of the fireplace should be built with concrete cinder blocks, and it should be at least 12 inches high. Make sure to use a level to ensure that the base is level.
Build the firebox. The firebox is the area where the fire will be built. It should be made of fire bricks, and it should be lined with a layer of mortar. It is important to ensure that the firebox is properly vented, using a chimney, to prevent the buildup of smoke and gases.
Build the chimney. The chimney should be made of concrete cinder blocks, and it should be at least 18 inches high. The chimney should be wider at the base than at the top, and it should be lined with a layer of mortar.
Build the mantel. The mantel is a shelf that sits above the fireplace. It can be made of wood, stone, or concrete. The mantel should be made of a fire-resistant material.
Apply mortar. Use a trowel to apply mortar to the joints between the concrete cinder blocks. Make sure to fill the joints completely and smooth them out. Mortar is a mixture of cement, sand, and water, which is typically used as a bonding agent between masonry units.
Allow the mortar to cure. It is important to allow the mortar to cure completely before you use the fireplace. This usually takes at least 24 hours.

Finishing Touches

Once the fireplace is built, you can add finishing touches. You can paint the fireplace or apply a sealant to protect it from the elements. You can also add a hearth, a mantel, or other decorative elements to personalize your fireplace.

Here are some additional tips for finishing your fireplace.

Paint the fireplace or apply a sealant. This will help to protect the fireplace from the elements and will also give it a more finished look.
Add a hearth. This is a non-combustible surface that sits in front of the fireplace. It provides a safe area for people to stand while enjoying the fire.
Add a mantel. This is a shelf that sits above the fireplace. It can be used to display decorative items.
Add other decorative elements. This could include things like a fire screen, a set of fireplace tools, or a piece of art.

Building an outdoor fireplace using concrete cinder blocks is a relatively simple project that can be completed over a weekend. However, it is important to follow all safety precautions and to ensure that the fireplace is properly vented to prevent the buildup of smoke and gases. With a little bit of planning and effort, you can create a beautiful and functional outdoor fireplace that will be enjoyed for many years to come.