Help Constructing Drainage Swale - 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 Tree2Likes
  • 1 Post By Bondo
  • 1 Post By Drachenfire
Reply
 
Thread Tools
Display Modes
Old 02-23-2018, 10:18 AM   #1
Member
 
Join Date: Dec 2006
Posts: 201
Rewards Points: 207
Default

Help constructing drainage swale


I have attached a picture of the area I need help with.

Backstory:

I built an addition off the back of my house (towards the drainage slope that goes the other way). The ground was already pretty close to the siding and now they require 8" from siding to earth. The normal slope of the ground would bring into the foundation at about 3".

I need to dig down 5" around the foundation and somehow build a swale that will direct the water around the back of the house to the side and out the front. The picture shows a top view and side view of the area.

If I missed anything pertinent let me know. I'm in CA and under permit and not sure what materials would be needed to accomplish this. Can this be drain tile or is it just a ditch carved in the ground? I also want to install a deck over this area.
Attached Thumbnails
Help constructing drainage swale-img_2107.jpg  
wease is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-23-2018, 10:58 AM   #2
Remodel and New Build GC
 
MTN REMODEL LLC's Avatar
 
Join Date: Sep 2010
Location: Colorado @ 7651'
Posts: 7,970
Rewards Points: 2,244
Default

Re: Help constructing drainage swale


Basically a swale is just going to be a regrading.... landscapers can certainly help with a little bob or back-hoe in there.... I can't tell how much dirt you have to move.

Your BO can advise if a concrete pad way along your home can be employed such that you only need 2" below slab grade, rather than 8....(I thought it was 6)
__________________
Never stop learning (xcep fer speling en typeing)
MTN REMODEL LLC is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-23-2018, 02:52 PM   #3
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 8,632
Rewards Points: 1,342
Default

Re: Help constructing drainage swale


Ayuh,.... A Swale is a barely noticeable trench dug into the ground that continuously falls away from it's high point,....

Could be done with a shovel, pickax, rake, 'n wheelbarrow, or a bulldozer,....
Or anything in between,...
mark sr likes this.
Bondo is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-23-2018, 03:10 PM   #4
Usually Confused
 
lenaitch's Avatar
 
Join Date: Feb 2014
Location: Central Ontario, Canada
Posts: 4,976
Rewards Points: 2,182
Default

Re: Help constructing drainage swale


As the other lads have said, a swale is just a wide, shallow, gradual depression that slopes to a centre then slopes to where you want the water to go. It should be wide and shallow enough that you could run a lawn mower over/through it. Ideally, you should want it about 6' away from your foundation - and the grade sloped from the foundation to the swale - and keep any changes of direction nice and gradual, just like in your diagram.
__________________
_________________________________________
Who Dares Wins
lenaitch is offline   Reply With Quote
Old 02-23-2018, 03:11 PM   #5
retired painter
 
Join Date: Jun 2017
Location: east tenn
Posts: 6,886
Rewards Points: 1,776
Default

Re: Help constructing drainage swale


Think of it as a ditch but without steep sides, blended smoothly into the rest of the terrain so you can easily mow it.
mark sr is offline   Reply With Quote
Old 02-23-2018, 06:35 PM   #6
Member
 
Join Date: Dec 2006
Posts: 201
Rewards Points: 207
Default

Re: Help constructing drainage swale


Ok. I just don't think I can move that much dirt. Hoping I could do something closer to the foundation. Like within 2 feet. Digging any more than that would require a LOT of dirt removal and machines. Is there another way to do this? Thanks for the help so far.

EDIT: Also, I want to build a deck over this area.

Last edited by wease; 02-23-2018 at 06:38 PM.
wease is offline   Reply With Quote
Old 02-24-2018, 06:10 AM   #7
retired painter
 
Join Date: Jun 2017
Location: east tenn
Posts: 6,886
Rewards Points: 1,776
Default

Re: Help constructing drainage swale


A narrow ditch will likely work but it won't look as nice and could be a trip hazard. I suppose you could fill the ditch with big rock.
mark sr is offline   Reply With Quote
Old 02-24-2018, 07:02 AM   #8
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 12,130
Rewards Points: 4,030
Default

Re: Help constructing drainage swale


A French drain might be better, buried underground, and then a deck over it.

ED
de-nagorg is online now   Reply With Quote
Old 02-24-2018, 08:13 AM   #9
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 8,597
Rewards Points: 2,800
Default

Re: Help constructing drainage swale


It is better if the primary water flow is away from the foundation.

The more water runs by your foundation, the more water will soak in before getting all the way past, and this will aggravate basement flooding problems and/or increase the load on your basement sump pump.

A disadvantage of an underground French drain compared with a swale is that you need more downgrade to work with to get the water that entered the French drain back out to the surface to run down your existing drainage slope at the edge of your property (top of your diagram) beyond your addition.
__________________
Stick to your lawn watering schedule until it really starts to pour. After the storm you have only the same number of rest days you always had and then you need to start watering again.

Last edited by AllanJ; 02-24-2018 at 08:21 AM.
AllanJ is offline   Reply With Quote
Old 02-24-2018, 09:28 AM   #10
Member
 
Join Date: Dec 2006
Posts: 201
Rewards Points: 207
Default

Re: Help constructing drainage swale


I don't have a basement. Just very low crawl space.
wease is offline   Reply With Quote
Old 02-24-2018, 10:02 AM   #11
Big Dog
 
Drachenfire's Avatar
 
Join Date: Jun 2017
Location: Northern Virginia
Posts: 1,982
Rewards Points: 3,994
Default

Re: Help constructing drainage swale


I had an issues with water at the back of my house flooding my lower floor due to a slight slope of the property.

I installed a french drain system to move water from the back of my house and around to the front.

Looking at from the back it works this way. The property slopes from right to left and back to front.

There are downspouts on both ends of the house.

The drain is connected to the downspout it then moves to the left and goes into a two a grated top 12"x12" catch basin. There is then about 6 feet of drain pipe and another grated top 12"x12" catch basin. These basins are what collect the water flow from the yard. The pipe then continues to the left corner where that down spouts ties into the system. From there it runs diagonally across the yard to the low point where it is connected to a pop-up diverter. The connection to the downspouts serve two purposes it keeps the water from the yard and it helps flush the french drain pipe.





I have had that system in for about 5 years now and it continues to work perfectly.
de-nagorg likes this.
__________________
My Deck Rebuild Progress

Fate whispers to the warrior, "You cannot withstand the storm," and the warrior whispers back, "I am the storm."
Drachenfire is offline   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
Washing machine drainage issue Centex2011 Plumbing 6 10-08-2014 03:45 PM
get rid of swale? kree Landscaping & Lawn Care 6 04-22-2012 08:15 AM
Ideas for Preventing Swale Erosion? (Photos) JustADoc Building & Construction 4 08-17-2011 06:49 AM
Drainage Tile and Retaining Wall nabz Landscaping & Lawn Care 3 05-25-2009 01:22 PM
The Bioswale, french drain, deck, drainage dilemma (long) seabright_sc Building & Construction 2 01-05-2008 03:37 PM




Top of Page | View New Posts