The new wall is going to block the natural drainage down the slope so level 50 mm wide gaps between the sleepers along the bottom course and put a length of perforated drainage pipe behind the sleepers and cover it with gravel to stop it blocking up with soil and roots.
Sleeper retaining wall drainage details.
Backfill behind the wall with gravel for drainage.
How to build a sleeper retaining wall.
Landscaping screws are great for joining sleepers together.
These walls are the tie back and crib generally used when the wall has to be higher than 0 9m 3ft although not limited to.
However retaining walls are built with a certain capacity in mind.
Why proper drainage is important for retaining wall performance.
The sleepers will need to be pinned through the height to keep them stable lots of different ways to do that.
Logs or sleepers both fixed in by posts while on the other hand the open face walls have gaps in the face basically for drainage.
Use an aggi pipe with a 100mm gravel surround maximum stone size of 10mm.
The sleepers themselves should be built up with staggered joints.
This is to relieve water pressure on the face of the wall.
Brian ashworth june 10 2013.
They are screwed in without needing pre drilling and hold sleepers very firmly.
The design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning.
Install a drain behind the wall.
A retaining wall is built to hold back a certain amount of soil.
Remember to make the sleeper wall with an arm at each end going back into the high bit.