 鲜花( 57)  鸡蛋( 42)
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Advantages& u' s# X, e. d m, `5 D- J
Very durable in cold weather9 w+ ^6 i: x/ C. m9 \, J" z
High percentage of recycled material and are 100% recyclable( i( K9 g- ?7 S( Q9 U0 K/ l
Disadvantages
. A; e {+ o, }! z8 k3 oRusting (require maintenance to prevent corrosion)
9 O& K9 c2 a* q8 G: XCopper and lead roofs can be targeted by metal thieves Z( R' U5 j2 \2 j
High heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure
) n; `/ n& Z4 D9 o, bCellular and radio reception may be negatively impacted |
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