For diy purposes opt for manufactured blocks that are.
Best backfill material for retaining wall.
For proper drainage the first 12 inches of space behind a retaining wall should be filled with crushed stone or gravel.
Retaining walls can be constructed using a variety of materials from poured concrete and large timbers to natural stones even bricks.
When you have built your retaining wall then you will need to add some backfill to the hole in order to shore up the wall and prevent any type of collapse of the underlying structure when you are ready to add your backfill to the hole you should make sure that you have enough suitable material to install in the hole and also take care that you avoid problems such as collapse of the.
Compacted native soil can be used to backfill the rest of the space behind the wall.
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.
Screenings otherwise known as fa5 or limestone screenings are a great choice for backfill because it compacts well.
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.
It should be coarse well draining material to help keep the basement dry.
5 best stones for backfill.
Trench back fill tbf 3.
Second a retaining wall must have properly compacted backfill.