HVAC Curbs Are One of the Most Important Parts of a Flat Roof System

Many commercial buildings throughout Northeastern Pennsylvania have rooftop HVAC units installed on flat or low-slope roofs. While most property owners focus on the rubber roofing membrane itself, one of the most common leak areas is actually around the HVAC curb system.

At The Flat Roof Guys, we frequently repair commercial rubber roofs in Scranton, Wilkes-Barre, Hazleton, Bloomsburg, and surrounding NEPA areas where failed HVAC curbs have caused serious water damage.

If these areas are not properly installed and maintained, they can quickly become a major source of roof leaks.

What Is an HVAC Curb?

An HVAC curb is the raised frame or platform that supports rooftop heating and cooling equipment. These curbs help elevate HVAC systems above the roof surface while creating a sealed transition between the equipment and the rubber roofing system.

Because rooftop units vibrate, expand, contract, and experience constant weather exposure, the curb area is one of the most vulnerable parts of any commercial flat roof.

Why HVAC Curbs Fail

Commercial roofs in Northeastern Pennsylvania deal with harsh weather year-round. Snow, ice, heavy rain, heat, and freeze-thaw cycles all put stress on roofing systems.

Over time, HVAC curbs can develop problems such as:

Cracked flashing
Loose seams
Shrinking rubber membrane
Water infiltration
Rusted metal components
Improper drainage around units

In many cases, leaks around HVAC systems are not caused by the rooftop unit itself. Instead, the problem is the roofing materials surrounding the curb.

Signs Your Commercial Roof May Have HVAC Curb Problems

Building owners should watch for warning signs that may indicate roof leaks near rooftop equipment:

Water stains on ceiling tiles
Leaks near HVAC systems
Bubbling rubber roofing membrane
Standing water around rooftop units
Mold or mildew odors
Visible flashing damage
Interior moisture during heavy rain

Ignoring these issues can eventually lead to insulation damage, rotted decking, mold growth, and expensive interior repairs.

Why Proper Rubber Roofing Installation Matters

At The Flat Roof Guys, we specialize in commercial EPDM rubber roofing systems because they provide excellent durability and flexibility for flat and low-slope roofs.

However, even the best rubber roofing system can fail if penetrations and HVAC curbs are not installed correctly.

Proper curb installation includes:

Professionally sealed flashing
Correct membrane attachment
Proper drainage design
Secure edge detailing
Routine maintenance inspections

Our team carefully evaluates these areas during every commercial roof inspection.

Commercial Rubber Roof Experts in NEPA

The Flat Roof Guys proudly provides commercial flat roof repairs and rubber roof replacements throughout Northeastern Pennsylvania.

Our services include:

Commercial roof leak repair
HVAC curb flashing repairs
EPDM rubber roof installation
Flat roof maintenance
Commercial roof inspections
Full rubber roof replacements

We strongly believe rubber roofing remains the best solution for flat and low-slope roofs due to its long lifespan, flexibility, and durability in Pennsylvania weather conditions.