Backfill soil on the garage roof does not need to be sent for inspection. According to the relevant information, the backfill of garage roof generally does not need to be compacted. A good way is to pile the soil to a height 100~200 higher than the normal elevation, and then let it stand for a period of time, preferably by raining or watering. If the design has the requirement of compaction coefficient, it must be submitted for inspection. If not, there is no need to send it for inspection. If it meets the planting requirements, don't compact it too tightly. Compacted soil is easy to harden, which is not conducive to the growth of lawn trees. However, sedimentation coefficient should be considered.