Walkway between houses - drainage

david2006April 19, 2010

Putting a walkway between ours and the neighbour's house. Not sure on finish layer; maybe interlock. Excavating to 9" depth. There'll be 4" drain pipes running under the walkway, and downspouts will tie into these.

Existing grass has a slope of about 0.4" per foot from the back to the front yard. In order to mate backyard level to front driveway level, I'm planning to have the finished walkway slope about 0.25" per foot, from back to front. It will also slope by this much side to side, so there'll be about a 1-1/2" dip in the center (13 feet between the houses). From what I've read in most places, 0.25" per foot of slope away from a house is sufficient.

My main question is regarding basement windows on the houses. Without ths consideration, the finished surface of a consistently sloping walkway would have been right at the level of the bottom of this window. Given that backyard drainage is being piped under the walkway, and downspouts are also feeding into this piping, only rain hitting the surface of the walkway is of concern. What is a safe drop between the bottom of a basement window, and the walkway surface?

Thank you for reporting this comment. Undo
toronado3800 Zone 6 StLouis(6)

What's the lay of the land?

I get 4 - 5 inches of flowing water one the garage side of my house a couple times a year. Less on the other side.

Of course that's 3/4 way down a 800 foot hill.

    Bookmark   April 20, 2010 at 12:32AM
Sign Up to comment
More Discussions
Can a new wood fence be moved?
I recently purchased a house with a newly installed...
need help regrading
hi, currently the mulch surrounding my home foundation...
Privacy for Small Yard - Help!
Hi All! First time poster - LONG TIME reader! I'm in...
Need help with plant selection....
Any ideas of what plants I can plant between the dark...
Please need help 100% blank slate both front and back
Hi guys glad I found this forum been reading alot of...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™