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 w$ P' H. V/ @& {3 I {% H% f
产品是可以用30年/40年/50年的。" o! Q( c: ~( s/ d6 s
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。9 k' K: u, w% p, {+ s- b1 ]
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。/ M" G* l7 A6 I W& T; N4 v+ u
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通常10-15年就要换屋顶。