Your metal roof panels have an expected lifespan of 50 to 100 years – a shelf life that is unrivaled in the roofing material industry. But like most materials which are consistently exposed to weather and the elements, metal roofs eventually require maintenance and repair. Over time you may find yourself dealing with deterioration, rust, or unforeseen accidents such as a branch falling on your roof. If you find yourself dealing with a hole in your metal roofing, rest assured that this problem IS fixable! When done properly, repairs can last as long as the roof system itself. To ensure a job well done, our experienced team of professionals have put together a step by step process for repairing holes in your metal roof yourself.
Prior To Beginning Repairs
Underlying structural issues can be indicated by a hole in the system. Be sure to complete a thorough under-deck safety review and roof analysis before attempting repairs. You should also be sure to match the patching material with your existing metal roof to prevent cracking and splitting. Using the same materials will ensure the panels have the same rate of contraction and expansion, avoiding stress on the repair site.
Pre-Clean The Repair Area Before Scuffing
The first step to any good repair is cleaning the area with a cleaner that a residue free cleaner. After the panels are free from dirt, film, or algae growth, use a wire brush to scuff the repair area. This will help the sealant bond to the metal. Make sure to avoid scuffing other areas of the roof, as this removes the protective coating from the panel’s surface.
Measure, Cut, Round
You will need to measure the repair area so the patch can easily cover the hole as well as overlap 2” in all directions. After the sheet metal patch has been cut, round the corners with a file or emery cloth. This prevents corners from catching snow, ice, or other debris which can damage the structural integrity of the repair.
Install The Patch
Liberally apply a urethane sealant to the surface of the panel being repaired, leaving no gaps. Press the patch over the damaged area, being sure to squeeze sealant from the edge of the patch along all sides. If there is an area without sealant, moisture can penetrate under the patch. Secure the patch into place using pan-head sheet metal screws. The screws should be placed 1″ inside the patch from the edge, and every 3-4″ around.