 鲜花( 57)  鸡蛋( 42)
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Advantages7 \9 t% a, w: j1 N7 S. f% a2 p
Very durable in cold weather4 [4 C$ e: @7 k4 b: P+ h
High percentage of recycled material and are 100% recyclable
5 A3 S5 ?- J% F6 \! g, @& ODisadvantages# w9 a/ x1 D9 b, W, r8 f( g4 a
Rusting (require maintenance to prevent corrosion)
@2 Z1 o& |4 e& e/ {* kCopper and lead roofs can be targeted by metal thieves# a5 L, }! K6 B4 f: ?4 d
High heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure' k6 X/ g# `: q3 Y% f, t% N8 ]
Cellular and radio reception may be negatively impacted |
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