Retaining Wall Base Gravel

Walls over 4 foot should use geo grid fabric different block designs limit allowable height use filter fabric over wet or dry soil then cover with gravel ensure good drainage with the use of backfill drain.
Retaining wall base gravel. Crucial for supporting the rest of the wall a good base is made of compacted soil and at least a six inch layer of compacted sand and gravel. A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it. 25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed. Using construction adhesive secure your block caps and create the top layer of your retaining wall.
A handheld tamping tool can really help in getting the gravel level but you re right one stray stone can throw off the entire operation. For lower walls 2 we put 1 minimum of gravel 6 of sand then reinforced concrete base or concrete block below grade. 150 mm plus an additional 1 in. Cover the gravel between your retaining wall and landscape with topsoil or sod so your garden will grow against your.
More information on retaining walls where the base trench steps up a slope. The base of a retaining wall should be set below ground level. Our trenches were more like 18 24 deep or more depending on the grade and about 18 wide. 600 mm wide the length of the wall the depth of the trench will be 6 in.
Retaining wall base trench. Brush off the previous course to clean off any debris. Dig a base trench 24 in. The wall gets its strength from a sturdy base consisting of gravel.