OSE Shop 2011 Filling low areas under floor

Filling and compacting low areas under floor foundation

Compact underpinnings are essential for a sturdy, long-lasting, weight-bearing floor. Dump loads of fill dirt into the area and spread it fairly evenly until you have 6-8” of depth (or ‘lift’) in the fill that is in the depression. Work over the filled area with a rolling or impact compactor. Expect the resulting fill to be only 4-5” deep. Repeat these steps until the depressed area is raised to the site level needed. Compact the soil to at least 3’ outside the edge of the workshop floor.