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Old 09-03-2013, 10:21 PM   #1
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Below grade windows and drainage


Hey Folks, installing a window well on one side of my house and had a couple of questions. I have installed a 4" perforated pipe that T's into my homes weeping tile.... I have read a couple articles online that recommended filling the pipe with crushed stone... is this a good or bad? Also I am planning on installing the window well so it sits about 4" above grade and filling the well with stone about 12" deep and to about 3" below the bottom of the window. I am having a hard time finding "best practices or what code is" for window wells... does my plan sound good or should I tweak it at all?

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Old 09-04-2013, 06:37 AM   #2
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Below grade windows and drainage


No clue where that idea of filling the pipe with stone came from. Someone else has brought that up before on here.
Makes 0 since to me and would defeat the whole system.
I can see stone around and below the pipe but for sure not inside of it.
http://www.homeconstructionimproveme...-window-wells/

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Old 09-04-2013, 07:28 AM   #3
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Below grade windows and drainage


Always put stone in the pipe IF it's perferated, or the soil surrounding it will soon plug it up..........

Your entire plan sounds good to me, it's similar to what we typically do........
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Old 09-05-2013, 12:36 PM   #4
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Below grade windows and drainage


Never-mind.....

Gary
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Last edited by Gary in WA; 09-05-2013 at 01:10 PM. Reason: Whoops!
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Old 09-06-2013, 03:36 PM   #5
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Below grade windows and drainage


I am not a drainage pro.... IMHO, if you add gravel to the vertical pipe, make sure none goes in the horizontal pipe to restrict water flow. Possibly wire mesh (aka- hardware cloth) or landscape fabric (life-span, strength, etc.) at the fitting to separate. Gravel is rated at 0.45 for the "Typical void ratio"; Table 1 chart. http://www.google.com/url?sa=t&rct=j...51773540,d.cGE

Adding gravel at the "T" will reduce the whole main-line piping (behind it) by 1/2; flow rate (.45 voids = .55 gravel material solids taking up otherwise empty space; "It is recognized that the seepage that passes through the foundation, filter, drain, and pipe is constant. That is, the system does not create or eliminate the total volume of water transported. The amount of seepage available is then dependent on the most constrained portion of the system." Bold is mine; quoted from source above.

Each system was sized for local conditions at install; capillarity of soil; perk test, possibly other things; springs showing at excavation, 2 story house wall on weather side, etc. Why risk restricting/damming the system with gravel by 50%; that is any footage on the higher/intake side, not the sump/daylight draining side. This seems logical to me, thoughts? Anyone....

Gary
PS. Sorry about earlier answer, found my link; misfiled in my library, lol.
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