An Unexpected Source to Your Pesky Roof Leak

When a commercial roof starts leaking, the immediate assumption is damage to the roofing system. While more often than not this is the case, sometimes the issue is coming from your rooftop HVAC unit.

But how can this unit be the issue?? Well, we’re glad you asked! Here are 8 sneaky strategies your HVAC unit might use to make you think you have a roof leak:

Clogged AC Drain Lines Drain lines expel condensation. If clogged, water backs up, causing continuous dripping inside the building, which can appear as a roof leak.

Corroded Drip Pans Drip pans collect condensation from the AC coils. Over time, they can corrode or crack, leading to water leakage into the roofing material.

Faulty or Corroded AC Shroud The shroud, or outer cover, protects internal components from the elements. If it becomes damaged or corroded, it can allow rainwater to enter the unit and leak into the building.

Leaking Refrigerant Lines Leaks in refrigerant lines can cause water to accumulate around the AC unit, potentially seeping into the roofing system.

Blocked Condenser Coils When condenser coils are blocked, the AC unit works harder, freezing up and producing excess condensation when it thaws. This additional water can contribute to roof leaks.

Poorly Sealed Ductwork If ductwork is not properly sealed, air leaks can cause condensation build-up, which can drip onto the roof and cause leaks.

Loose or Missing Fasteners Loose or missing fasteners can create gaps in the AC unit’s installation, allowing water to enter and cause leaks.

Worn or Damaged Seals Seals around the AC unit can wear out or get damaged over time, creating opportunities for water ingress.

At Monument, we believe a little knowledge goes a long way in safeguarding your commercial property. The key takeaway from this article is that regular inspections and maintenance of both your roofing system and HVAC units are essential to protect against damaging leaks.