Advantages - s' ?+ {3 h8 O. a( |; y8 W/ C4 S! dVery durable in cold weather 3 v4 d Z4 b" X. ]6 d! NHigh percentage of recycled material and are 100% recyclable& a4 W" G2 N! M
Disadvantages " u7 {1 }( ^4 \9 F' E1 sRusting (require maintenance to prevent corrosion)/ D' p7 F- x2 s
Copper and lead roofs can be targeted by metal thieves' A3 z7 d. L! T9 s3 p$ u$ u2 P
High heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure' c* O/ Q7 j+ z# c
Cellular and radio reception may be negatively impacted
Metal roof ?? ' |8 }2 f$ W0 b& G; r1 l4 I$ vwhat's going to happen in a hail storm, will it be very loud ??? * \6 d h. K; H6 C3 A) y4 U8 cSummer raining season, if it rains in night, people can sleep well ???
icing 发表于 2014-6-7 21:36 . S& t7 u2 B/ N0 w$ E9 B) H$ ^
Metal roof ??4 T6 k. p, N: a1 P
what's going to happen in a hail storm, will it be very loud ???% q: t* {6 s; P, I+ n, f
Summer raining seas ...