4-6 Foot Retaining Wall Options - Landscaping & Lawn Care - DIY Chatroom Home Improvement Forum
Advertisement


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree3Likes
Reply
 
Thread Tools
Display Modes
Old 04-07-2017, 08:58 PM   #1
Member
 
Join Date: Nov 2014
Location: Vestavia Hills, Alabama
Posts: 311
Rewards Points: 616
Default

4-6 foot retaining wall options


I was all set to pull the trigger on the Home Depot "Black Friday" sale for their Pavestone "Rockwall" blocks at 1.78 each.

http://www.homedepot.com/p/Pavestone...7550/204643744

However, reading the fine print, they are only good for max 2 foot high walls. So, I'm seeking suggestions for alternative options.

I need a 12 foot long wall that tapers from appx 5 foot tall at the house wall down to zero where it meets the existing grade out in front of the house wall. It creates a level yard left to right, along the house for bed plantings, but slopes down from back to front to meet the existing grade to form a surface runoff drain channel.

I will be burying the first course and they will be sitting on 3/4" drain gravel. There will be french drains along the house wall as well as the retaining wall with gravel backfill. The wall where the dirt meets the house will be fitted with rigid plastic dimpled waterproofing membrane.

I just need the most affordable retaining wall system that supports a retaining wall that is 5 foot above grade at its tallest point.

A picture below illustrates the before/after. The wall will be on the right side, holding the dirt, trees & landscaping bed added there.


Last edited by homeimproverjoe; 04-07-2017 at 09:05 PM.
homeimproverjoe is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-07-2017, 11:24 PM   #2
Member
 
Join Date: Nov 2014
Location: Vestavia Hills, Alabama
Posts: 311
Rewards Points: 616
Default

Re: 4-6 foot retaining wall options


I think I've convinced myself to just do a gently sloped grade rather than a retaining wall. Sorry for all the questions. Hopefully the Q&A helps someone in the future.
homeimproverjoe is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-09-2017, 11:54 PM   #3
Newbie
 
Join Date: Apr 2017
Posts: 14
Default


In my neck of the woods, anything above 36 inches requires an engineer. I guess the engineer has to create the plan.
Nik333 likes this.
Goodguyq is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-10-2017, 12:05 AM   #4
Member
 
Join Date: Feb 2015
Location: California
Posts: 10,664
Rewards Points: 4,312
Default

Re: 4-6 foot retaining wall options


It's an interesting thread. I'm not an expert on anything here. But, every time I read your posts I worry about Soil Creep/Mass Movement. Your photos don't show what is below the slope or above it & you haven't mentioned what kind of rock is below the soil. But, take me with a grain of salt, I am fr. earthquake-prone California.
http://galleryhip.com/soil-creep-diagram.html

https://en.wikipedia.org/wiki/Mass_wasting

Last edited by Nik333; 04-10-2017 at 12:12 AM.
Nik333 is online now   Reply With Quote
Old 04-10-2017, 09:37 AM   #5
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 12,149
Rewards Points: 4,068
Default

Re: 4-6 foot retaining wall options


If built correct a Dry Stacked Stone Wall can be any height needed to be used as a retaining wall.

Making the base of the wall wider allows it's height to be as high as needed.

This can also be incorporated into a gently sloping swale to build your planting beds on at the wall.

Many places are terraced this way.

Get 8 inch diameter roundish stones, lay a base of 6 feet or so wide X the length needed, then another layer on top of that, then another on top.

Going up in a stack similar to stacking cannonballs.

Then fill dirt between the stone stack, and building. Gravity holds it all together, and it looks good .

To go higher, just add another base stone, and subsequent layer up. Repeat as needed for more height.

ED
de-nagorg is online now   Reply With Quote
Old 04-17-2017, 09:36 PM   #6
Member
 
Join Date: Nov 2014
Location: Vestavia Hills, Alabama
Posts: 311
Rewards Points: 616
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by Nik333 View Post
It's an interesting thread. I'm not an expert on anything here. But, every time I read your posts I worry about Soil Creep/Mass Movement. Your photos don't show what is below the slope or above it & you haven't mentioned what kind of rock is below the soil. But, take me with a grain of salt, I am fr. earthquake-prone California.
http://galleryhip.com/soil-creep-diagram.html

https://en.wikipedia.org/wiki/Mass_wasting
Hard clay and sandstone mostly. The right side will be sloped at about 35 degrees max. There will be monkey grass planted on the slope to help retain the soil.

Last edited by homeimproverjoe; 04-17-2017 at 09:39 PM.
homeimproverjoe is offline   Reply With Quote
Old 04-18-2017, 12:59 AM   #7
Member
 
Join Date: Feb 2015
Location: California
Posts: 10,664
Rewards Points: 4,312
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by homeimproverjoe View Post
Hard clay and sandstone mostly. The right side will be sloped at about 35 degrees max. There will be monkey grass planted on the slope to help retain the soil.
There is a saying that if you cut the end of a hill out, add water & shake, you get jello. You might want to consult an expert to make sure that the lower depth sand will not shift. It's visible in the photo you put up when the tree was removed. It's actually a heavy weight & I believe it's the slope of the rock underneath that matters.

I thought the concept of the trees bending toward the shift was interesting. I don't know what's below you at the end of your sloped yard. Good luck.
homeimproverjoe likes this.

Last edited by Nik333; 04-18-2017 at 01:24 AM.
Nik333 is online now   Reply With Quote
Old 04-18-2017, 09:16 AM   #8
Member
 
Join Date: Nov 2014
Location: Vestavia Hills, Alabama
Posts: 311
Rewards Points: 616
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by Nik333 View Post
You might want to consult an expert to make sure that the lower depth sand will not shift. It's visible in the photo you put up when the tree was removed.
Thanks for the helpful advice. I'm not sure which photo though. Can you link to it? There is some sand that we brought in for the patio job a few years back that appears in the pond excavation photos, but I've seen no sand present otherwise. Lots of hard clay mostly. Some pics below...

Hole dug out for garden pond:


Dirt that came out of hole that consists mostly of large chunks of hardened clay (some concrete pieces mixed in from first saw cut):


Note: The currogated black pipe in the shot above will be cut and replaced with 30 feet of 4 inch sched 40. That pipe is not part of the french drain system (seen here too) but rather is connected to a surface drain box to the left of the courtyard and a single downspout at the courtyard.

Quote:
Originally Posted by Nik333 View Post
I don't know what's below you at the end of your sloped yard. Good luck.
Natural slope that goes down to a dry stormwater drainage creekbed in the back of the house. All surface water will be directed into this area.




Last edited by homeimproverjoe; 04-18-2017 at 09:22 AM.
homeimproverjoe is offline   Reply With Quote
Old 04-18-2017, 09:22 AM   #9
Member
 
jlhaslip's Avatar
 
Join Date: Dec 2009
Location: Edmonton, Alberta
Posts: 5,975
Rewards Points: 708
Default

Re: 4-6 foot retaining wall options


I hope you are putting a compacted gravel base down under the blocks.
__________________
Quote:
Short of cutting off a body part, the worst that can happen in woodworking is manufacturing really nice looking kindling. --- Quoted from lenaitch
jlhaslip is offline   Reply With Quote
Old 04-18-2017, 10:32 AM   #10
Member
 
Join Date: Feb 2015
Location: California
Posts: 10,664
Rewards Points: 4,312
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by jlhaslip View Post
I hope you are putting a compacted gravel base down under the blocks.
jlhaslip, this is what I've been responding to:
Quote:
Originally Posted by homeimproverjoe View Post
I think I've convinced myself to just do a gently sloped grade rather than a retaining wall. Sorry for all the questions. Hopefully the Q&A helps someone in the future.
I'll find the tree later in the day.
Nik333 is online now   Reply With Quote
Old 04-18-2017, 01:58 PM   #11
Member
 
Join Date: Nov 2014
Location: Vestavia Hills, Alabama
Posts: 311
Rewards Points: 616
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by jlhaslip View Post
I hope you are putting a compacted gravel base down under the blocks.
No longer considering a retaining wall. We are opting for a 30 degree slope from fill to grade in both horizontal and vertical directions.
homeimproverjoe is offline   Reply With Quote
Old 04-18-2017, 07:29 PM   #12
Member
 
Join Date: Feb 2015
Location: California
Posts: 10,664
Rewards Points: 4,312
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by homeimproverjoe View Post
I'm not sure which photo though. Can you link to it? There is some sand that we brought in for the patio job a few years back that appears in the pond excavation photos, but I've seen no sand present otherwise. Lots of hard clay mostly. Some pics below...
http://www.diychatroom.com/f16/stump...m-jack-491585/ Post #6, photo seems to show sand.
Nik333 is online now   Reply With Quote
Old 04-18-2017, 08:14 PM   #13
Member
 
Join Date: Nov 2014
Location: Vestavia Hills, Alabama
Posts: 311
Rewards Points: 616
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by Nik333 View Post
I think this is the photo you are asking about...



That crepe myrtle is actually on the opposite end of the yard that will be getting fill. Its on the left side of the house. Still, I don't recall any sand there. It was mostly rich black dirt. Very rich dirt. So much so that I considered piling it separate to use for topsoil.

However, the dirt on the right side of the house that is getting the fill dirt is rich red clay that required a spade bit jackhammer to dig out.

This pic is very representative of it:


Last edited by homeimproverjoe; 04-18-2017 at 08:20 PM.
homeimproverjoe is offline   Reply With Quote
Old 04-18-2017, 10:13 PM   #14
Member
 
Join Date: Feb 2015
Location: California
Posts: 10,664
Rewards Points: 4,312
Default

Re: 4-6 foot retaining wall options


Quote:
Originally Posted by homeimproverjoe View Post
I think this is the photo you are asking about...



That crepe myrtle is actually on the opposite end of the yard that will be getting fill. Its on the left side of the house. Still, I don't recall any sand there. It was mostly rich black dirt. Very rich dirt. So much so that I considered piling it separate to use for topsoil.

However, the dirt on the right side of the house that is getting the fill dirt is rich red clay that required a spade bit jackhammer to dig out.

This pic is very representative of it:

It could be several layers or strata, created over time. I told you I'm no expert, it's more of a hobby. But, the soil to the left of the photo definitely looks like sand. I'm trying to get you to look deeper than fill, although fill can slide, too.

This is interesting:

http://trekbirmingham.com/topics/geology/

Last edited by Nik333; 04-18-2017 at 10:17 PM.
Nik333 is online now   Reply With Quote
Old 04-19-2017, 04:37 PM   #15
Member
 
Join Date: Feb 2015
Location: California
Posts: 10,664
Rewards Points: 4,312
Default

Re: 4-6 foot retaining wall options


Maybe that very rich black dirt has oil!
Nik333 is online now   Reply With Quote
Sponsored Links
Advertisement
 
Reply


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
Retaining wall against brick+cement block foundation. Waterproofing options? homeimproverjoe Landscaping & Lawn Care 3 03-20-2017 02:47 PM
Replacing two existing 2' retaining wall, options for digging? BT5150 Concrete, Stone & Masonry 10 11-06-2014 05:58 PM
Patio with small retaining wall details.. freeclimbmtb Concrete, Stone & Masonry 0 08-08-2014 11:49 AM
French Drain Behind Retaining Wall Tom5151 Landscaping & Lawn Care 0 08-05-2011 01:01 PM
Help deciding on type of retaining wall bignateyk Landscaping & Lawn Care 2 05-04-2009 10:17 AM




Top of Page | View New Posts