How To Build An Outdoor Fieldstone Fireplace

How to Build an Outdoor Fieldstone Fireplace

A fieldstone fireplace can be a beautiful and functional addition to any outdoor living space. It provides warmth, ambiance, and a focal point for gathering. While building a fieldstone fireplace is a challenging project, it is achievable with the right planning, materials, and tools. This article will guide you through the essential steps involved in constructing your own outdoor fieldstone fireplace.

1. Planning and Design

The first step in building any structure is planning. This involves determining the location of your fireplace, its size, and the style you desire. The following considerations are crucial:

Location: Choose a level and stable area that is accessible and away from flammable materials. Consider the prevailing wind direction to avoid smoke blowing into your living space.
Size: Determine the size of the fireplace based on the desired heat output and the scale of your outdoor area. A smaller fireplace is more manageable for a smaller space.
Style: Research different fieldstone fireplace designs for inspiration. Consider the overall aesthetic of your outdoor space and create a design that complements it.
Materials: Source suitable fieldstone. Consider the color, size, and texture of the stones to achieve your desired aesthetic. Ensure the stones are clean and free of debris.
Firebox: Choose a prefabricated firebox or consider building a custom one using firebrick.

2. Foundation and Framing

A solid foundation is essential for an outdoor fireplace. This will ensure the structure is stable and withstands the weight of the fieldstone and firebox.

Excavation: Dig a hole for the foundation, slightly larger than the dimensions of the fireplace base. Excavate to a depth of at least 12 inches.
Gravel Base: Fill the excavated area with 4-6 inches of gravel for drainage and stability. Compact the gravel using a tamper.
Concrete Foundation: Pour a concrete foundation, extending slightly beyond the dimensions of the fireplace base. Allow the concrete to cure completely before proceeding.
Framing: Construct a wooden frame around the foundation for support. Use pressure-treated lumber to resist rot and decay. The frame should be securely attached to the concrete base.

3. Building the Fieldstone Walls

Laying the fieldstone requires meticulous attention to detail and careful placement to achieve a stable and aesthetically pleasing structure.

Mortar: Prepare a mortar mix specifically designed for outdoor use. Ensure it is consistent and workable. Use a trowel to apply a layer of mortar to the foundation and base of the first layer of fieldstone.
Fieldstone Placement: Position the fieldstone carefully, overlapping them for stability and visual appeal. Choose stones of varying sizes and shapes for a more natural look.
Mortar Joints: Use a mortar rake or pointing tool to create consistent mortar joints. This will ensure the walls are smooth and aesthetically pleasing.
Firebox Installation: Once the walls reach the desired height, install the firebox. Ensure it is level and secured to the frame.
Chimney Construction: Build a chimney using fieldstone or brick. Ensure it is tall enough and has adequate draft to vent smoke effectively.

4. Finishing Touches

After the walls are complete, add finishing touches to enhance the appearance and functionality of the fireplace.

Mortar Finishing: Once the mortar has cured, use a pointing tool to clean and finish the joints. This will create a smooth and professional look.
Hearth: Construct a hearth in front of the firebox using a durable material such as concrete or stone. This will provide a safe and stable surface for placing firewood.
Mantle: Consider adding a mantle to the fireplace. This can be made from wood or stone and provides a decorative element. It can also serve as a platform for displaying items.
Landscaping: Surround the fireplace with landscaping elements such as plants, shrubs, and paving stones. This will enhance the overall aesthetic of the outdoor space.