wood retaining wall, drainage


Old 02-02-09, 02:48 PM
Thread Starter
Join Date: Feb 2009
Posts: 5
Received 0 Votes on 0 Posts
wood retaining wall, drainage

I am building a series of terraces in my downsloping back garden and am looking for some drainage advice.

I am building 4 walls, each 3ft high and 20 ft long using pressure treated 4x4's and 2x12's running horizontal to the ground. I was wondering how much drain rock backfill I need to use behind the wall for drainage. Is 4 inch deep starting approx 4in below the bottom 2x12 board, up to approx 6in below the top of the 2x12's sufficient or too much?

Do I need to use a preforated drain pipe at the bottom of the gravel backfill to slope the water away.

Should I surround the drain rock on 3 sides with landscape fabric (ie on the soil side, the board side and the bottom)

Are 4x4's sufficient?

Sponsored Links
Old 02-20-09, 01:15 PM
Join Date: Feb 2009
Posts: 11
Received 0 Votes on 0 Posts
hey u may want to check out my thread i just put up.. its about problems i'm having with my wood retaining wall, could save you some time in the future!


Last edited by Newt; 02-20-09 at 01:40 PM. Reason: Add link to other thread.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes
Ask a Question
Question Title:
Your question will be posted in: