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 U7 S6 {1 g, q) S3 J4 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.