Different quality results in different lifespan. Some warranty 25 years while the excellent ones have a lifespan of 50 years. Of course, there are others in between and last from 30 to 40 years. They are all priced differently.
我应该是这个领域的权威了。我曾经在IKO工作过。3 }2 x, t1 z j( s
产品是可以用30年/40年/50年的。 6 ~4 @( b1 ]( j8 d) C但是记住,安装水平是整个屋顶的关键,这就是有的安装公司要价1万但是另家可能只要6千的原因。 0 p( `5 ~1 x: m质保是取决于怎样安装。还有房顶的角度和结构,屋顶的底料。 ' F" A: c' Q, Y: A y ! f, u% r. u2 I' F( G1 `7 s通常10-15年就要换屋顶。