How a Sacrificial Membrane Helps Maintain Chicago Commercial Flat Roofs Under HVAC Units

When it comes to commercial roofing in Chicago, protecting your flat roof from long-term damage is just as important as proper installation. One commonly overlooked area is the space beneath rooftop HVAC condensers. These units generate heat, vibration, and constant foot traffic for maintenance, which can cause premature wear to the roofing membrane underneath. That’s where a sacrificial membrane comes into play.

A sacrificial membrane is an extra layer of material—typically TPO or modified bitumen—installed directly beneath rooftop equipment. Its purpose is to absorb wear and protect the primary membrane from damage. Over time, this layer can be easily replaced, preventing costly repairs to the main roof system.

At Anchor Point Roofing, we’ve worked on countless Chicago commercial roof repair projects where neglecting the areas beneath HVAC units led to leaks and deterioration. Adding a sacrificial membrane is a simple yet effective way to preserve your investment and extend the life of your roof—whether it's TPO, modified bitumen, or another flat roofing system.

If your commercial flat roof has rooftop units and you want to avoid unnecessary damage, let us help. We'll inspect your roof and recommend the best solution to protect it for the long haul.

Contact Anchor Point Roofing today for expert commercial roofing solutions in Chicago.

Location: Chicago, IL