Metal roofs are well-known for their strength and durability. That said, they may last years before they need repair, unless, of course, you have softball-sized hail hit the roof. Then repairing the metal roof is very similar to body work on your car. Here is how they are similar.
Pounding out and Rolling out the Dents
When you have a ding in your car panel or the door, the body shop pulls it off and hammers out the dent. Then they resurface the exterior side of the panel before repainting it and reinstalling it. Likewise, when a metal roof has a ding in it, the panel is removed, hammered or rolled out, and then reinstalled. (The only time a roof panel is repainted is when it was painted in the first place and the amount of lost paint from restoring it is obvious from the ground.)
Welding It Back Together
Powerful forces of nature can rip off and bend a metal roof. The same holds true for cars. When a Level 3 or higher tornado or hurricane makes your roof look similar to a can of beans that has been opened with a pocketknife rather than a can opener, the repair work may require welding. Again, the panels have to be removed.
Each panel is clamped to a flat surface, where the ripped metal sections are pushed as close together as possible. Then a welder applies his/her torch and smelts the metal on these edges back together. If there is not enough metal left to stretch the gap between the torn edges, then the panel is replaced.
Finding and installing Replacement Panels
Sometimes you simply cannot repair panels on cars. The damage is more expensive to repair than finding a replacement panel. On a metal roof, that could happen too. If it ever does, your roofing contractor would take the really awful panel off the the roof and put on a fresh one in its place.
Of course, the circumstance that is far more likely is that the panel was torn from the roof of your house and sent a mile or more away such that you cannot recover it. It may take forever to find it, even if you had time to look. Ergo, the roofing contractor just installs the new panel instead. This time around, he/she will use some special fasteners to make sure the newer panel stays put.
Hi, welcome to my blog. My name is Wendy, and after traveling through many parts of the world as I worked on a degree in anthropology with a minor in architecture, I learned a lot. I saw how people took different approaches to the same issue (putting a roof on their home), but more importantly, I noticed how those approaches were dictated by the climate and culture in the area. Unfortunately, I think a lot of people in North America build roofs that are traditional rather than roofs that are the right fit for the climate. If you are interested in exploring the latter idea, I'm here to help. These posts look at the best way to get a roof that protects you from the elements. Explore, enjoy and send your friends over to my blog. Thanks!