Determining if a problem is an HVAC or roof issue

By Henry Staggs, roofing expert.

A roof leak or HVAC problem?

During winters in areas such as Arizona, the rooftop air conditioning systems of commercial buildings and many residential homes can freeze up. This causes the coils to be covered in ice, giving the impression of a roof leak when the ice melts. The owner or occupant may then call a roofer, who will inform them that it is not a roof leak. It is worth noting that many of these roofers need to be compensated for their time to come out and inspect the issue.

Why does this happen?

There are several reasons why this can happen. It could be as simple as a lack of maintenance, where the coils are dirty or clogged air filters. Sometimes, a blower fan may not be working. There could also be problems in the ductwork that hampers airflow, clogged condenser lines or low refrigerant. Any professional HVAC technician should be able to find the problem and provide a solution.

Roofer versus HVAC

Since the inception of rooftop HVAC units, roofers have been blamed for HVAC problems. When an issue arises, the roofer may claim it is an AC problem, but the HVAC technician can often identify it quickly. However, there are times when the roofer and the HVAC technician point fingers at each other, leaving the owner or occupant with an undiagnosed water intrusion. It is important to ensure that the roofer and the HVAC technician work together to identify and resolve any issues.

What do you do?

If you notice a leak near the ductwork, air intake or any other air vent attached to the ductwork system, it is crucial to act. If the leak is happening and it’s not raining, you might choose to call the HVAC technician first. Otherwise, it is essential to maintain your HVAC system by keeping the coils clean, the air flowing unobstructed, and the condensation lines clear of debris. Keeping the ducts clean and in good condition can also help prevent leaks.

Need help?

If the roofer and the HVAC technician start pointing fingers at each other, it is best to call in a building inspector, HVAC consultant or roof consultant. These professionals are trained and skilled and can help diagnose the problem. They can provide you with a detailed report and recommendations. This step can also provide the backing you may need if the matter is elevated to a different level.

Have a question? AskARoofer.   

Find your local roofing contractor in the RoofersCoffeeShop® Contractor Directory. 

Disclaimer: The information provided on AskARoofer.com or information sent by emails is the opinion of the writers. It is the responsibility of the reader to check for accuracy in one's own jurisdiction, as there are different codes and restrictions for different parts of the country. AskARoofer.com does not accept any liability for the use of information on this website or email. AskARoofer.com has no controls over product failures, installation, or climate conditions that may change the roofing process in your area. Our information is in general to our area and cannot be the same as your local town or state. It is advised to seek the local Building Department, Licensed Contractor, and local Product Representative for proper installation requirements and code enforcement when installing a new roof.