A modern aluminum pan roof can offer several years of maintenance-free provider, but older roofing can eventually show signs of leaking or corrosion. In addition, exposure to years of direct sunlight can fade or damage painted finishes and lead to unsightly flaking or peeling. Fortunately, any of these problems can be repaired by an experienced do-it-yourselfer equipped with everyday tools.
When installed correctly, a metallic pan roof is held together by galvanized fasteners folded tightly into leak-resistant neoprene washers. If the screws or nails become loose, water will seep through the space to the surface beneath. In many cases, you can resolve this issue simply by tightening the screws or banging the nails back to place. If the fasteners or the adjacent roof show any signs of corrosion, replace them with new galvanized fasteners and neoprene rubber washers, and then apply a clear sealer over the screw or nail head.
Your aluminum pan roof can be damaged by wind uptake, expanding winter ice conditions along with the nesting of wild animals. Any of these situations can cause the roof panels to pull away in the flashing, which channels rainwater to the surfaces beneath. Scrape out any debris or dirt in the affected area before applying a generous coating of roof cement or a urethane adhesive/sealant. In most circumstances, the urethane will dry and cure more quickly. Apply weight to the newly sealed region for about 24 hours or as directed by the manufacturer’s instructions.
If the roof has been installed using old-fashioned lead washers or non-galvanized nails or screws, those fasteners will corrode over time and that corrosion could spread beyond the hole. If that’s the case, you should plan on replacing the original fasteners to stop widespread corrosion. Use a stiff wire brush to remove all the visible corrosion, and fill some soft spots or tiny holes in the aluminum with a epoxy patching compound.
Contemporary aluminum pan roofs incorporate a factory applied finish, however that protective coating will surely fail before the aluminum itself because of sunlight exposure and also the repeated expansion caused by heat and cold cycles. Signals of failure include fading, chalking, flaking and peeling. You can repair the issue using a new coat of elastomeric paint in a cool roof color. These coatings are far less prone to premature failure in temperature variations, and in addition, they reduce summertime heat transmission into the living room beneath.