 鲜花( 57)  鸡蛋( 42)
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Advantages Z. U0 Y' j& p; F. ]" w, M
Very durable in cold weather
" S: q" W. H2 Z$ a- @ JHigh percentage of recycled material and are 100% recyclable0 a: Z6 ]7 w; g! a: a) }! A
Disadvantages% {5 G, ]* u( R2 y
Rusting (require maintenance to prevent corrosion)+ Y) d; t+ J% m+ a+ `# \* }8 S
Copper and lead roofs can be targeted by metal thieves
2 O0 `# R, N$ |High heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure6 Y; p" y, T; J0 D, r1 c) n& @
Cellular and radio reception may be negatively impacted |
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