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How To Care For Your Metal Roof
Whether it is molded into wood-like shingles for use on traditional or older homes or applied as ridged sheets for more modern architecture, metal roofing provides your home with the durability of steel. In either case, proper maintenance ensures a longer life for the material and a leak-free roof for many years to come.
1. Avoid standing on the roof. A metal surface is thinner and does not support as much weight as a wooden one. While you are not going to fall through the roof, you may accidentally dent and damage the panels. If you must walk on the roof, do so directly over joists and purlins, which are the horizontal support structures.
2. Sweep, blow off or pick up any debris that may have gathered on the roof surface, such as leaves and branches. Pay attention to gutters and drains. The accumulation of dirt is more pronounced on the flatter roofs common to modern architecture. If you notice any biological growth or sap, use a stiff brush and water to clean the area. A once-a-year cleaning with a hose and roof cleaner can keep the surface looking its best.
3. Make sure two different metals in your roof do not touch each other — when you have this situation. This can happen if pieces are accidentally loosened or moved during inclement weather. Certain materials do not interact well and can increase corrosion, such as copper and aluminum, or copper and galvanized steel.
4. Tighten loose screws or replace any that have been dislodged. Your replacements must be of the same material as the roof. When you are installing new screws, do so only in raised areas. Putting screws in lower areas can cause water to puddle, which may produce rust.
5. Inspect sealants at the seams and edges. Though a few sealants last for the lifetime of the roof, some have a life expectancy of only 20 years. Replace as needed. Touch up any worn or missing paint to prevent rust. These inspections are particularly important after severe storms or a large buildup of snow. When you see any areas of rust, it may mean that your anti-corrosion coating is wearing off. A roofing contractor can confirm the cause or may discover more serious reasons for the rust.
6. Repair any separated seams or holes. Though you can easily reseal loose seams by tightening screws, holes and other damage may require a professional. Any gaps in the metal allow water to potentially damage the underlying roof structure and produce leaks inside your home.