Hi, My house has them. German made ceramic coated rolled steel, tile looking product with 50 year transferable warranty. Cost almost 3 times but I don't need to worry about leak any more in my life time. I passed concrete tile due to concern for weight and cracks when hail strom hits. They installed lattice using 1x6 and 2x2, every piece is screwed down. ridge venting. two man crew took about 10 days from start to finish. remove old wood shake, lattice install, cut ridge vent, screwing down all the pieces. It is tested, proven hurricane proof in Florida.