What Size Gravel For Retaining Wall Base

600 mm wide the length of the wall the depth of the trench will be 6 in.

What size gravel for retaining wall base.

Kevin to keep the blocks on your retaining wall level and structurally sound you need a base layer of several inches of well compacted sharp gravel. For heavy duty walls up to 30 ft. 150 mm plus an additional 1 in. This prevents water from building up behind the wall.

Crushed stone 1 sizes are from 2 to 4. A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it. The leading cause of wall failure. Similar to gravel paver base is a form of construction aggregate that contains crushed rocks such as limestone.

Typically this gravel ranges in diameter from 2 5 inches 6 35 centimeters to 4 inches 10 16 centimeters. Gravel known as size 1 is relatively large. Dig a base trench 24 in. High and weigh 50 to 75 lbs.

It can be difficult to work with as it generally cannot be shoveled and instead must be moved individually stone by stone. They re 16 to 18 in. Retaining wall base trench. The wall gets its strength from a sturdy base consisting of gravel.

This is standard for all types of landscape walls. Crushed stone 67 sizes from 3 4 down to fine particles. A level base on which the wall sits. Due to soil erosion your retaining wall should be built on a solid foundation made from paver base.

You ll typically find them at landscape supply yards. Choose a paver base with landscape rocks between 1 2 inch and 3 4 inch in size. The largest of the crushed stone grades. Fill the trench with a 2 to 3 inch layer of paver base.

The various sized crushed gravel with the fines helps ensures for appropriate compaction. Tall go with full size blocks. Round rocks such as pea gravel rolls and dislodge under pressure resulting in failure of the retaining wall. Placed behind the retaining wall to promote drainage of water away from the wall.

The base material should only consist of angular sharp edged particles such as minus gravel. More information on retaining walls where the base trench steps up a slope. Long x 6 to 8 in.