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In the metal versus shingle roof debate, aluminum roofing has several advantages. However, aluminum roofing costs more than typical asphalt roofing, so up-front cost is a major downside. Aluminum is also somewhat susceptible to denting, and repairs can be more costly than for other roof types because your roofer will need to replace large panels rather than individual shingles. Aluminum roofs are also noisy in the rain, which some homeowners don’t like.

Generally, magnets do stick to a metal roof, though certain metals may not be magnetic. In that case, you can use self-adhesive hooks designed for outdoor use or plastic clips that hook onto your gutter or the edge of your roof. But if your metal roof is made of steel, aluminum, or copper, you're in luck—those are all magnetic metals.

Yes, you can walk on a standing seam roof, but you should avoid stepping on the seams and instead walk on the flat portions. The seams are thin and provide less traction, and they don’t get direct support from the roof decking underneath, so they’re more likely to dent from added weight.

Issues include leaking seams, rusting panels, loose fasteners, and denting from debris or weather, which can cause damage that requires intervention.