Dig a trench 12 inches deep around perimeter of retaining wall.
Building a retaining wall out of landscape timbers.
Wood retaining wall instructions set up wooden stakes and nylon strings to represent the height and perimeter of the retaining wall.
Retaining walls can be constructed using a variety of materials from poured concrete and large timbers to natural stones even bricks.
For diy purposes opt for manufactured blocks that are.
If your retaining wall is going to be 40 feet 12 m long you need 14 posts 40 length of the wall divided by 3 space between each post for your wall.
Drive stakes into the ground at each end.
The base of the retaining wall should be half the wall s height.
How to use landscape timbers for a retaining wall 1.
Drill 1 2 inch wide holes through the ends of each timber with a hole drill bit and hammer an 18 inch long metal.
If it s going to be 5 feet 1 5 m tall make sure your posts are 5 feet 1 5 m tall with an additional 18 inches 46 cm on top.
If the distance is greater than 8 drive additional stakes so that the gaps do not exceed 8.
Tie a string to a stake at the wall s desired height and stretch across to opposite stake or stakes.
Stretch another level line near ground to represent the top of the first course of landscaping timbers.
Dig a foundation trench for the first row of timbers image 3.
Connect the stakes with a string and adjust until it is level images 1 and 2.
Make the trench about 8 inches deep.