Aluminum roof re-covering involves installing a new roofing layer over an existing metal roof, often to extend the roof's life without a full replacement. This process is governed by local building codes, which typically require the old roof to be in good condition, free of rust, and structurally sound to support the added weight of the new material. It's important to know that many codes limit the number of roofing layers allowed, usually to two, to avoid excessive load and potential fire hazards. Some codes may also specify types of underlayment and fasteners, as well as ventilation requirements to prevent moisture buildup. Before deciding on a re-cover, homeowners should inspect for signs of rust, loose seams, or warped panels, which indicate the existing aluminum roof might not be a safe base for new covering.
For a safe DIY check, look closely at your roof's surface on a dry, sunny day. Press gently on panels to spot soft spots, and inspect flashing and seams for gaps or corrosion. If you find peeling paint or suspect hidden rust, these are red flags. When calling a roofer, ask if your local codes allow re-covering over aluminum and what materials they recommend to comply with those codes. You might also inquire about the warranty on both labor and materials, especially whether a new membrane will be fully sealed and watertight over your aluminum base. Understanding these points helps ensure your roof stays durable and code-compliant, giving you peace of mind and protecting your home efficiently.