Timber Retaining Wall (step by step)
Things you will need.
- 100x200mm treated pine timber (for posts)
- 75x200mm treated pine timber (for boards)
- 2x Rapid Set for each post hole
- Enough Light Weight Scoria to back fill
- Long screws
- Black plastic for backing
Lets Get Started!
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Decide where you want your wood retaining wall to be. Places where water tends to ooze up or stand are not good choices as the water will rot your wall and ruin it rather quickly.
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Clear the area where you want to build your wall of any brush or debris and rake it smooth.
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Cut your 100x200mm posts to the length you want your wall to be plus 400mm and set the posts aside.
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Dig a shallow trench for water drainage between the place where your posts will be and fill the trench with gravel.
- If you are building your retaining wall out of timber or ties, set and level each timber or tie into place, building up the rows.
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Dig 450mm holes for your posts on each side of the area where your retaining wall will be.
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Place each post in its hole and pour RAPID SET into each hole so that the posts will stand up straight when the cement has dried.
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Smooth out the concrete so that it is level with the top of each hole, brace the posts with 2 by 4 inch(5 by 10 centimeter) boards and allow the cement to cure overnight.
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Once the cement is cured, cut your 75x200mm boards to the length between your posts. If your boards are shorter than the length between your posts, cut them so that they sit in the middle of each post.
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Attach your cut boards on the outside of your posts with carriage bolts.
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