retaining wall foundation

Old 08-23-18, 03:52 PM
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retaining wall foundation

I am going to make a little retaining wall under the roof that is attached to my garage. Most of the info I've seen recommends digging down and putting a layer of crushed stone for a foundation. You then have to carefully lay each block to get it level and even. Do you see a problem with, instead of crushed stone, laying a treated board down to lay the blocks on? That way they will all line up perfectly. I would make sure to make the substrate even so there will be a minimum of settling over time. My soil is very sandy so drainage is not an issue.
Old 08-23-18, 04:28 PM
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The board does not provide the proper foundation for the wall. You did not say how high or what material is being used but a foundation of compacted limestone is the best, depth depends on the unknown items above!
Old 08-23-18, 04:49 PM
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NO, wood is not a foundation material. There is a reason compacted crushed stone is called out in the instructions.

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