请问tar & gravel roof and asphalt shingle roof 有什没不同

SNOW.W

请问tar & gravel roof  and  asphalt shingle roof 有什没不同，哪个好？谢谢！

kingsnake

Gravel roof is gravel on the tar, usually for flat roof. Cost a little more but can be repair partially. It need equipment e.g. pump molten tar to roof top.
& i# B1 [1 d. V7 I* Z9 MAsphalt shingle roof last 15 to 20 years. Usually place on roof with slope. You can nail shingles to roof youself or with friends.