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. 5 q0 B: s7 _7 i/ C0 M/ U$ JAsphalt shingle roof last 15 to 20 years. Usually place on roof with slope. You can nail shingles to roof youself or with friends.