Can a rooftop air-conditioning unit damage the roofing membrane over time?

Have you noticed a roof leak near your rooftop air-conditioning unit? Heavy equipment, constant vibration, and rubbing against the roof can gradually damage the waterproofing layer. At a Chicago condominium building, an HVAC condenser had begun sinking into the roofing membrane, increasing the risk of water seeping into the building.

To fix the damage, our team installed a heat-welded modified-bitumen patch, a strong waterproof roofing material, over the damaged area. We then added a sacrificial membrane beneath the HVAC unit. Think of it as a protective cushion that takes the wear and tear, helping prevent the main roof layer from getting damaged.
Chicago’s changing seasons can also affect roofing materials. Adding protection beneath rooftop equipment helps reduce wear, prevent potential leaks, and extend the life of a flat roof.

If your rooftop HVAC unit rests directly on your flat roof, watch for compressed roofing materials, worn surfaces, or deteriorating membrane around its base. These warning signs can indicate that the roof's waterproofing is becoming vulnerable. A professional inspection can help determine whether a repair or additional protective layer is needed before the damage develops into a more serious leak.
Protect Your Flat Roof with Anchor Point Roofing!
Worried that your rooftop HVAC equipment could be putting your property at risk? Don't wait for water stains or interior damage to appear. Contact Anchor Point Roofing to schedule a professional roof inspection in the Chicago area. Our team can assess your roofing membrane, identify vulnerable areas around rooftop equipment, and recommend practical repair solutions to help prevent leaks and extend your roof's service life.

Location: Chicago, IL