Trench back fill tbf 3.
Best backfill material for retaining wall.
Screenings otherwise known as fa5 or limestone screenings are a great choice for backfill because it compacts well.
Backfill refers to the dirt behind the wall.
Second a retaining wall must have properly compacted backfill.
For diy purposes opt for manufactured blocks that are.
It should be coarse well draining material to help keep the basement dry.
5 best stones for backfill.
For proper drainage the first 12 inches of space behind a retaining wall should be filled with crushed stone or gravel.
In order to provide proper drainage at least 12 inches of granular backfill gravel or a similar aggregate should be installed directly behind the wall.
Compacted native soil can be used to backfill the rest of the space behind the wall.
Site soils are fine if the natural soil in the area is mainly sandy or gravelly but don t use the existing soil from the.
This is so that when water gets into the space it does not become bogged down in soil but instead can flow down the wall to the drains or weep holes.