 鲜花( 57)  鸡蛋( 42)
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Advantages7 Y# ~6 y0 K! p) L6 J
Very durable in cold weather, a2 U" X8 ]" B$ n" x/ |% z4 q. o0 z3 w
High percentage of recycled material and are 100% recyclable
: {, b3 l, _) q7 g* s5 {- A( dDisadvantages2 F" K) N9 G& W. S* K" r
Rusting (require maintenance to prevent corrosion)* L" T, |* O, L
Copper and lead roofs can be targeted by metal thieves
3 \& @, |* h& I/ ]( h! b3 \1 oHigh heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure
0 V8 B4 X, k* V5 VCellular and radio reception may be negatively impacted |
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