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MT: (406) 752-6728
ID: (208) 410-6821
MT: (406) 752-6728
ID: (208) 410-6821
Roof leaks in commercial buildings don’t just show up out of nowhere. They often start small, then spiral into bigger problems that cost businesses time, money, and stress. Most owners know to keep an eye on drains and flashing, but there are other sneaky spots that tend to get overlooked. Let’s walk through five areas that deserve more attention and could save you from a major mess down the road.
Rooftop doors, skylights, and clerestory windows look harmless, but they’re common troublemakers. Water loves to sneak in through worn-out weatherstripping, cracked sealants, or clogged weep holes. If those areas aren’t sealed tight, you’re inviting leaks right into your building.
What to do: Check these areas twice a year. Make sure seals are intact, weep holes are clear, and frames are tight. Replace any damaged materials right away.
You might trust your rooftop HVAC unit to keep things cool, but it can be a major source of leaks if you’re not careful. Flashing around HVAC curbs tends to wear out over time. Gaskets and seams on the equipment itself can crack or loosen, letting water run straight through.
What to do: After every HVAC service call, give the surrounding roof area a close look. If anything looks off, get a roofing pro involved to reseal those penetrations properly.
Flashing plays a big role in keeping your roof sealed tight, but it’s not set-it-and-forget-it. Buildings shift. Flashing bends. Seams separate. When that happens, water can get in behind the joints at parapets, walls, and roof edges.
What to do: During scheduled maintenance, walk the perimeter and inspect all flashing. If you see any gaps, warping, or loose sections, act fast to secure or replace them.
Here’s the tricky part: the leak you see isn’t always where the problem started. Water can travel along beams, wiring, or ductwork before finally dripping into a visible spot inside. That means you might have a roof issue 20 feet away from where the stain shows up.
What to do: Don’t ignore signs inside your building. Stains, musty smells, mold, or damp spots deserve a closer look. Track them back to possible entry points and compare with your roof inspection notes.
Flat roofs and water don’t mix well. When drains or gutters get clogged, water pools up, and the longer it sits, the more damage it causes. Eventually, ponding weakens membranes and causes slow leaks that grow over time.
What to do: Make it a habit to clean out gutters and drains every season, especially in areas with leaves or debris. If you keep seeing standing water, it’s time to rethink the slope or drainage setup with a pro.
There are a few extra tools that can help you stay ahead of leaks. Roof coatings add a protective layer that deflects UV damage and seals up tiny cracks. Infrared scans and controlled water testing can catch leak paths you wouldn’t see with the naked eye. Just remember, climbing up there yourself might void a warranty or create safety risks. Some things are best left to trained pros.
Staying ahead of leaks means sticking to a solid routine. Check rooftop doors and skylights twice a year to ensure seals and weep holes are in good shape. Take a look at HVAC curbs after every service to catch worn gaskets or flashing issues early. Give flashing and joints a semi-annual inspection, and don’t skip monthly interior walk-throughs to catch any leaks starting inside. Clear out drains and gutters every few months, and consider adding coatings or professional scans before and after major storms.
Most roof leaks don’t start with a dramatic downpour. They begin with overlooked details and build slowly over time. Keeping an eye on these five areas helps you avoid surprise repairs, protect your assets, and keep your business running without interruptions.
Tired of chasing leaks or wondering what you’re missing up there? Advanced Roofing knows exactly where to look and what to fix before small issues turn into costly problems. We’ll check everything, from doors and drains to ductwork and flashing, so you can stay focused on your business. Call us for a free inspection today, and let’s get ahead of leaks together.
