前麵VanSmallLandlord已經答了，是panel metal roof。其優點嘛，請看

ztToday's metal roofs offer the following advantages:

• Metal roofs are lightweight--less than 1/3 the weight of asphalt and one twentieth the weight of concrete.
• A metal roof won't rot, crack, crumble, split, break or burn.
• Metal roofs are made from recycled steel and aluminum material and are 100 % recyclable.
• Metal roofs have coatings that prevent 75 to 80 percent of the sun's energy from being absorbed into the roof.
• A metal roof can reduce roof surface temperatures by 60 to 70 degrees.
• Metal roofs are available in a wide variety of styles and custom colors.
• Metal Roofing is durable and maintenance free.
• A Metal Roof increases a building's value.
• Metal Roofing is an ideal platform for integrating solar electric and solar thermal renewable energy solutions.
• A Metal Roof can earn up to 25 U.S. Green Building Council LEED credits

所有跟帖： 

• 價錢比傳統的其它Roof都貴，貴多少我沒調查過。一般是 -如山- ♂ (53 bytes) () 12/24/2012 postreply 20:26:53