Sealants: Your Building’s First Line of Defense
What to Look For
Walk your building’s perimeter and inspect joints around windows, doors, and facade transitions. You’re looking for cracked, split, or deteriorated sealant—any place where the material has pulled away from the substrate or developed gaps. Pay particular attention to south- and west-facing exposures, which take the most UV punishment.
Why It Matters
Failed sealants let water in. That water finds its way into concrete and masonry, and when temperatures drop, it freezes and expands. A single freeze-thaw cycle can turn a hairline crack into a significant structural issue. Over the course of a Midwest winter—with dozens of cycles—the damage compounds quickly.
Quick Fix vs. Call a Pro
Minor surface cracks where the sealant is still bonded can often be addressed with re-caulking by your maintenance staff. However, if you see joints pulling away from the substrate or gaps wider than ¼ inch, it’s time to call a professional sealant replacement contractor. Improper sealant application can trap moisture and make the problem worse.