If kept in good shape, you could get from 40 to 80 years from your metal roof. It could well be the last roof you put on your home. To get that many years, spend a little time annually inspecting and maintaining it. If you aren't comfortable working on your roof, have a local roofing contractor likeB And D Construction come out once a year to inspect the roof and repair problem areas. Otherwise, here are some tips to keep that metal roof looking and working well for you for years to come.
1. When on your roof, only walk on the horizontal support structures.
The metal roofing material is thinner than traditional asphalt and wood shingles. You can easily buckle a sheet of metal by stepping on an unsupported place. Walk only on the supported sections of your roof.
2. Sweep or wash debris off of your roof whenever you see any.
Branches and piles of leaves and pine needles on the roof create a dam to stop water from flowing off. Should water sit on a spot where the coating has been scratched off of the metal sheet, rust can start. Rust will pit the metal surface and create holes where leaks occur. Keep the roof clean so water doesn't pool.
3. Keep gutters clean and in good repair.
Water backed up in a gutter will touch the edge of the metal sheeting and cause rust where the roof coating has worn off. Keep gutters cleaned out and flowing. Should a wind-damaged gutter become bent and touch the roof, a chemical reaction will start if the metals are dissimilar. For example, a galvanized metal gutter touching a copper roof will cause corrosion and damage to the roofing material. Have a roofer replace these pieces if you can't bend the gutter back into place.
4. Check and secure connectors frequently.
Look for pulled up nails or sheet metal connectors and secure them before water can get under the metal sheets. Make sure the edge trim pieces and ridge cap are secure against the metal sheets and sealed so water can't get underneath them to the roof rafters.
5. Check flashings for proper sealing.
Inspect the flashings around chimneys, vents, pipes, and skylights to make sure the sealer is holding. Replace missing or cracked sealant. If the flashing has become bent because of inadequate sealant, have a roofer replace the piece and get a good seal against the roof.
6. Keep the paint in good shape.
Any paint that has flaked off or has been rubbed off of the roof should be touched up immediately. Water will make its way from the bare spot to under the adjacent painted metal and cause rust. You won't notice it until large sections of paint flake off. A little touch up every year will keep you from needing to repaint the whole roof.