Perhaps the rarest material used for RV roofs is aluminum. It's fairly unlikely that you will find an RV aluminum roof — with some notable exception (like the iconic Airstream trailers). Like fiberglass, aluminum adds weight to the RV. However, an aluminum RV roof has fairly low maintenance. It's important to understand the type of material your RV roof is made of, because each different type has various care and maintenance needs. Liquid RV Roof can be applied to various metal roofing systems including weathered Aluminum and weathered copper.