Roof Leak Risks in Royal Oak: Why AC Unit Flashing Can’t Be Overlooked

If you own a rooftop AC unit in Royal Oak, MI, your cooling system can affect your roof. Improper flashing and missing sealants around the unit create a real risk. A recent YouTube Short shows this problem: the flashing around an AC curb is installed incorrectly, with no counter-flashing or waterproof sealants.

Why This Matters

Flashing—thin metal strips around roof penetrations—forms a critical water-tight barrier. It protects vulnerable areas like vents, walls, and HVAC units. Counter-flashing, mounted above base flashing, adds a second layer to redirect water. Without both, even light rain can cause leaks, wood rot, and mold over time.

How the YouTube Short Highlights the Risk

The short clearly shows an AC curb left exposed. It’s missing both counter-flashing and sealant. This gap allows water to enter near your HVAC system. One roofing expert warned, “Poor flashing around the support platform for your HVAC unit can cause leaks in your ceiling or walls.” In Michigan, changing weather—freeze-thaw cycles, heavy snow, and rainfall—makes this mistake more damaging.

Steps Every Royal Oak Homeowner Should Take

  1. Inspect AC flashing regularly, especially on flat or low-slope roofs.

  2. Check both base and counter-flashing for proper installation, overlap, and integration with roofing materials.

  3. Use quality sealants around seams to prevent cracking during temperature swings.

  4. Schedule roof checks before winter to ensure everything stays durable and leak-free.

Final Thoughts

This YouTube Short reminds us that flashing is more than a detail—it’s your roof’s first defense. In Royal Oak’s climate, ignoring it can lead to costly water damage. If you notice leaks near your rooftop AC unit, contact a trusted local roofer or HVAC specialist immediately.

Make sure to check out our recent blog post about Roofing Shapes and Design