Metal roofing on flat roof???

Dear, I am a Store owner located in Mechanicsburg,PA. We have flat roof over our store and I guess its old can i replace it with metal roofing??? We have all HVAC equipments on the roof, whats the best way to put a new roof, my store is 2100 sq ft I need estimates from roofing contractors

Public Comments

1. You cannot have a flat metal roof because of the seams between the metal panels. They can't be properly sealed to stop standing water since they expand and contract with the weather. The only solution is a built up roof, that is, a roof using building felts and asphalt sandwiched between. There are spray on roofs and other novelties, but the traditional built-up roof (over the existing if you have less than two roofs up there already) is the best and will last longest.
2. A metal roof is not a good idea. Ponding water will leak through the seams even if they are soldered because expansion and contraction will open up the seams. Ponding water will also cause the steel roof to rust prematurely. A better option is a rubber membrane roof. Warranties as long as 40 years are available. A reputable roofing contractor will make quick work of the roof job and be around for any problems that may develop ... in other words, they will be around to take care of any warranty problems. Good luck with your roofing project.