What Every Commercial Property Manager Should Know This Summer Rooftop
AC Units on the Roof? Here’s How to Protect Your Membrane
Rooftop HVAC systems are a common feature on commercial buildings due to their convenience and space-saving design. However, without proper precautions, these units can lead to avoidable damage to your roofing system. In this blog, we’ll explore the potential risks of rooftop HVAC systems and outline practical steps you can take to protect your commercial roof membrane.
- Preventing Foot Traffic Damage
Regular servicing of rooftop HVAC units requires foot access, which can result in wear and tear to the roofing membrane. Without designated walkways or protective pads, repeated foot traffic can cause punctures, cracks, or surface degradation. Installing reinforced walk paths can help preserve the integrity of the roof surface while allowing safe technician access.
- Managing Condensation Drainage
HVAC systems produce condensation that, if not properly drained, can collect on the roof surface. Over time, this moisture can contribute to algae growth, membrane deterioration, and pooling water—factors that reduce the roof’s lifespan and increase the risk of leaks. Ensuring that all condensate lines are routed to appropriate drains or scuppers is essential.
- Securing Proper Equipment Supports
Improperly installed or unbalanced HVAC units can place uneven weight and stress on the roof. In some cases, vibration or shifting can compromise seams, flashings, or insulation. It is critical that all rooftop equipment is mounted on properly designed curbs or support systems that align with the roof’s structure and material type.
- Maintaining Seal Integrity
Rooftop HVAC systems often require multiple roof penetrations for electrical lines, refrigerant piping, and ductwork. Each of these penetrations must be carefully flashed and sealed. Over time, weather conditions and vibrations can break down these seals, allowing moisture to enter the building envelope. Routine inspections and resealing help maintain watertight protection.
- Inspecting After HVAC Work
After any HVAC repair, replacement, or upgrade, it’s important to inspect the surrounding roof area. Technicians may inadvertently cause damage during equipment handling or maintenance. A quick post-service roof check can catch minor issues before they become major repairs.
Conclusion
While rooftop HVAC units are a practical solution for commercial properties, they require extra attention to avoid unnecessary roofing damage. Through proper installation, sealing, drainage, and inspections, you can extend the life of your roof and minimize risk.
If you need help inspecting or reinforcing your rooftop systems, MJT Roofing offers tailored maintenance plans designed to protect every part of your commercial roof—HVAC units included.
