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. 4 n1 W% \3 s* Q4 e3 [' i. ^Asphalt shingle roof last 15 to 20 years. Usually place on roof with slope. You can nail shingles to roof youself or with friends.