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。$ E- |0 ~' O; t6 y) o+ A
产品是可以用30年/40年/50年的。7 T' b# X |- g/ H1 k& X" N w* G
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。* Y& Z' Y, a6 a) S) t3 ]
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。 $ A' ^! s b1 k9 a# x. U- |1 P* X& n, S7 X9 K7 ~4 J2 w7 @" z
通常10-15年就要换屋顶。