 鲜花( 57)  鸡蛋( 42)
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Advantages
% ~8 H. A9 R! n1 T' o& XVery durable in cold weather* h- c) a& n- r6 }% x4 ~
High percentage of recycled material and are 100% recyclable
# n$ @0 c. E5 x, HDisadvantages
) ^" f% Y' z( j8 l) q, ~Rusting (require maintenance to prevent corrosion)
& |6 [/ y3 [. S( v, HCopper and lead roofs can be targeted by metal thieves
; q5 H/ W {, Z' c6 G) ^High heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure
; J, m* v) ~3 RCellular and radio reception may be negatively impacted |
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