Hi All, I’m in the process of replacing a small retaining wall in my garden. I’m using h4 treated pine throughout the project and the height will be 400mm.
Do I need to add draining given the size of the wall? I’m reluctant to do it because I don’t want to have to cut the lawn back any smaller. If I do need to do it? How important is it to run it off into storm water drains?
Any general advice around this appreciated
Nick
by xnickGT
1 Comment
This should help!
https://www.finehomebuilding.com/1999/07/01/building-a-timber-retaining-wall
I just built a wall and left a minimum 3-4” of space behind the wall for crushed drain rock separated from the soil by geo-fabric. If you water your lawn, I assume a gap for drainage will be even more important.
I wasn’t going to put in a drain pipe behind the wall – we have very porous sandy soil – but ended up going with the pipe because I am cautious.