 鲜花( 57)  鸡蛋( 42)
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Advantages5 [# C6 n6 o3 w* @" q$ u+ _
Very durable in cold weather. J; D6 c. G! Q0 N. I2 o% S
High percentage of recycled material and are 100% recyclable: D# F' E. m l, M# n# X7 T
Disadvantages
; \( z* Z, O, z5 v7 X% gRusting (require maintenance to prevent corrosion)6 r5 D, z8 y9 \9 O$ Q' J
Copper and lead roofs can be targeted by metal thieves
3 O8 c4 W k" m5 a, o, ZHigh heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure, a. c' l# L5 f4 f! Z
Cellular and radio reception may be negatively impacted |
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