 鲜花( 57)  鸡蛋( 42)
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Advantages- t: c! I7 x' x( V5 {; n6 d
Very durable in cold weather, l9 ?, W }9 [/ ?/ Q
High percentage of recycled material and are 100% recyclable% `4 m; E* {- ^- {
Disadvantages7 X3 v0 c: z4 _, [0 E o
Rusting (require maintenance to prevent corrosion)
+ H7 g) [) N; V1 o l5 {3 LCopper and lead roofs can be targeted by metal thieves! p0 V& O, [$ m; Z) x; p, g
High heat conductivity of metals (particularly copper and aluminum) requires careful incorporation of insulation into the roof structure
0 Z. _* @1 ~* ]/ n! N; ACellular and radio reception may be negatively impacted |
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