 鲜花( 57)  鸡蛋( 42)
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Advantages+ l, H' e& z {, i( V& }2 _
Very durable in cold weather* S, A3 D8 }: C
High percentage of recycled material and are 100% recyclable
% G8 P% L7 k! H2 f, [% yDisadvantages
* z* F' w, {* a, w FRusting (require maintenance to prevent corrosion)5 {# N6 H: @$ V% p9 p8 W5 M
Copper and lead roofs can be targeted by metal thieves
* ]$ g; o# T4 ]4 X% Y8 KHigh heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure6 \. X1 e% Z" ~& j' ] S3 h. Y$ U
Cellular and radio reception may be negatively impacted |
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