When you look at an older home, the foundation is rarely the first thing you admire. Yet, a crumbling, exposed brick foundation can be an eyesore that devalues your property and signals neglect to potential buyers. Covering an old brick foundation is one of the most transformative cosmetic improvements you can make, turning a liability into a design feature. This process, often called foundation cladding, involves concealing the weathered brick with a new, clean surface that provides thermal insulation and creates a modern, finished look.
Before you grab a trowel, the most critical step is a careful assessment of the brickwork and the wall itself. Old brick foundations are susceptible to a specific issue known as spalling, where the surface of the brick flakes off due to water intrusion and freeze-thaw cycles. You must tap each section of the brick with a hammer; a solid "thud" indicates structural integrity, while a hollow "clink" suggests the brick is compromised and ready to crumble. Additionally, you need to identify the source of any moisture problems. If water is actively seeping through the wall, no cladding will last long until the water intrusion is stopped, often requiring external excavation or interior drainage solutions.
Choosing Your Cladding Material
The material you select will dictate the final appearance and longevity of the project. While you are covering brick, you want the finish to look intentional and high-end. The most popular and effective options for DIYers and professionals alike are specifically designed rigid foam insulation boards with a finished veneer or stone veneer products.
1. Rigid Foam with Stucco or Brick Scone
This method involves attaching high-density foam insulation (like XPS or EPS) directly to the brick wall. The foam acts as your vapor barrier and thermal break, and then a layer of synthetic stucco (often called Exterior Insulation and Finish System or EIFS) is applied over a mesh coating. The result is a smooth, monolithic finish that can be painted any color. Alternatively, a thin layer of brick scone can be troweled over the foam to mimic the exact profile and color of real brick, creating the illusion of a solid masonry wall.
2. Stone or Brick Veneer
If the goal is to replicate the exact aesthetic of the original masonry, manufactured stone veneer or thin brick is the ideal choice. These products are lightweight and come in interlocking panels, which significantly reduces the weight load on the foundation wall compared to traditional fieldstone. This method involves installing a wood furring strip system over the insulation to create a cavity, allowing the wall to breathe and providing a secure nail base for the veneer.
h2>The Preparation Phase: Why Wall Wash Matters
Regardless of the material you choose, the success of the project hinges entirely on the preparation. An old brick wall is often covered in soot, algae, dirt, and loose mortar. If you apply new cladding over a dirty surface, it can bond poorly, leading to peeling or blistering. A thorough "wall wash" is required. Use a pressure washer set to a low setting or a stiff bristle brush combined with a masonry cleaner to scrub the wall. Allow the foundation to dry completely for at least 48 hours before proceeding to ensure the moisture content is low enough for adhesion.
h2>The Installation Process: Step by Step
Assuming the brick is assessed as stable and the wall is clean and dry, the installation follows a logical sequence. If using foam, you will apply a bead of construction adhesive to the back of the board and press it against the wall, staggering the joints in a brick-like pattern for strength. You will then secure it with plastic anchors or screws designed for masonry. For veneer, you will first build the furring strip framework, ensuring the total distance from the old brick to the new surface is consistent. This gap is crucial as it allows the underlying brick to move independently without cracking the veneer. Once the framework is nailed, you can attach the stone or brick panels using the appropriate adhesive and mechanical fasteners.
h2>Addressing the Details: Joints and Mortar
One of the biggest mistakes DIYers make is treating the installation like drywall. Brick and stone installations require proper expansion and control joints. These are grooves cut into the material or gaps left in the grout lines that absorb movement caused by the settling of the house or shifting soil. Without these joints, the cladding will buckle, crack, or pop off over time. You should also decide on the finish of the mortar lines. A flat, modern mortar color often looks best with new installations, and this is achieved by using a pre-colored grout or a grout haze remover applied after installation.
h2>Finishing Touches and Long-Term Benefits
Once the cladding is installed and the grout has cured, the final step is to seal the joints and consider the integration with the rest of the home. You should seal the top edge where the cladding meets the rim joist to prevent drafts and insects from entering the wall cavity. The aesthetic reward is immediate; what was once a dull, gray surface becomes a crisp, modern backdrop. Furthermore, by covering the brick, you are usually adding a layer of insulation to the home, which can lower heating and cooling costs and help prevent moisture from getting trapped inside the wall structure.
