The weight of metal roofing is surprisingly low, which is a fact often highlighted by a metal-roof-contractor. In some cases, metal can be installed directly over existing shingles, saving on labor and disposal fees. However, a responsible metal-roof-contractor will first inspect the old roof to ensure there is no hidden rot. If the structure is sound, your metal-roof-contractor can s... https://kkroofspecialist.com.sg/metal-roofing-contractor-singapore/