Foundation and Interlock
Caulking
Using the highest quality structural
Weatherproofing sealant to ensure your
property's foundation stays resilient
and well maintained
what's "Foundation & Interlock Expansion Joint Caulking"?
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The expansion joint between your home's foundation and the surrounding interlock, concrete, stone, driveway, or patio is one of the most important yet often overlooked areas of your home's exterior. This joint is intentionally designed to allow your home and hardscape to naturally expand and contract with seasonal temperature changes. Usually gaps like that are filled with foam or polymer sand, but that eventually can dry out, crack, shrink, or separate, leaving an open gap that allows water, moisture, cold air, insects, dirt, and weeds to enter.
Why Foundation Expansion Joint Caulking Matters
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A failed or missing expansion joint seal may seem like a minor issue, but it can lead to significant problems over time. Rainwater and melting snow can seep into the gap between your foundation and surrounding hardscape, increasing the risk of moisture intrusion around your home's foundation. During Canada's freeze-thaw cycles, trapped water expands as it freezes, placing pressure on concrete surfaces and contributing to cracks, shifting, and premature deterioration.
An unsealed joint also creates the perfect environment for weeds, grass, moss, insects, and debris to accumulate. As vegetation grows, roots can widen the gap and trap even more moisture against the foundation. Cold air can also enter through deteriorated joints, making your home less energy efficient and increasing heating costs during colder months.
Professional foundation caulking helps prevent these issues before they become expensive repairs.
