Need Help With Wood Retaining Wall - Landscaping & Lawn Care - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Landscaping & Lawn Care


Thread Tools Display Modes
Old 08-11-2010, 03:42 PM   #1
Join Date: Aug 2010
Posts: 1
Rewards Points: 10

Need help with wood retaining wall

I want to extend an existing wood retaining wall about 8 feet. Design is pretty straightforward. I plan on placing 4x6" vertical timbers on each end, with one in the middle at the 4' mark. Will use three 12" planks for the wall (one buried, two above ground), which is the same as the existing wall.

One question I have is how to join the new part of the wall with the old part. Should I place a new vertical post up against the old post? Or should I try to have the new wall sections attach to the existing post? The existing wall planks are flush with the outermost vertical post, so I'm not sure how I could attach the new wall planks to the old post. If I bury a new post up against the existing post, won't the concrete from the existing post get in the way?

Photos below are of existing wall and the area where the new wall will begin.


idesign2 is offline   Reply With Quote
Old 08-12-2010, 02:53 PM   #2
Join Date: Mar 2010
Posts: 183
Rewards Points: 150

I can't see the "whole picture" so to speak, but my advice is to forget about the buried wood wall idea and consider a terrace type wrap around wall built of rocks if you have access to them that is. You can lay them dry . Anything wood in the ground will rot sooner or later. ........sorry, just my opinion.


bernieb is offline   Reply With Quote
Old 08-12-2010, 04:29 PM   #3
Civil Engineer
Join Date: Mar 2009
Location: Boston
Posts: 5,637
Rewards Points: 4,854

I'm with Bernie. Even pressure treated wood will not last more than 10 years in direct contact with earth, most wood will only last a few years. Segmental concrete block wall is relatively inexpensive, easy to put in, and looks good, that would be my suggestion. Or you can go with natural rock if you are a drywall fan.

If you absolutely must have a wood wall, make sure you use either a naturally durable wood like locust (maybe you get ten years out of it), or PT that is listed for direct earth contact.
Daniel Holzman is offline   Reply With Quote

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wall - LOAD BEARING: How to Move? user49172 Building & Construction 6 05-19-2017 04:53 PM
Drain tile questions for retaining wall installation. Tmaxx1 Landscaping & Lawn Care 11 06-10-2011 11:17 AM
Retaining Wall Weeping Tile Problem cg3459 Landscaping & Lawn Care 3 06-16-2010 06:22 PM
Attaching fence post to side of retaining wall? Drew328i Landscaping & Lawn Care 5 06-01-2010 07:53 AM
Retaining wall and fireplace? stf Building & Construction 9 08-28-2008 07:37 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1