When one of these units goes onto your roof, cuts have to be made. Anytime you cut into a roof, especially a flat one, there are risks of serious leaks down the line. Paying careful attention to properly seal and install flashing at all the seams is the only way to ensure the interior will be protected from the elements. Your HVAC Installation team is probably great at what they do, but installing flashing properly is the job of an experienced roofer.
Another potential issue to consider when installing a rooftop HVAC Unit is pooling of water around the unit. These AC units give off a lot of water from condensation. There is nothing that can be done about that. The bigger the unit, the more water it will create. If left to puddle not only will the water cause stains and leaks, but it will lead to mold and fungus growth on your roof. A simple solution is to channel the water to the nearest roofing drain. These lines need to be inspected at least semi annually to ensure they are doing their job. Mold and fungus will not only lead to costly repairs, but health issues for your customers.
Anytime work is done on your rooftop unit, special care must be given to ensuring the roof remains undamaged. An HVAC technician can possibly ruin the flashing around the unit or damage the roofing membrane when performing routine maintenance. MCAS Roofing & Contracting recommends to everyone to have at least semi annual roof inspections for all roof types. These inspections are meant to identify problems before they grow and become big and costly. When installing an HVAC unit it is always best to do it when your roof is initially constructed so that builders and roofers can work together on the plans. But if you do install an HVAC Unit after the fact, have a professional roofer on site. If you are anywhere in Westchester NY or Putnam NY, Contact MCAS Roofing today!