How to Calculate Roof Runoff and Size Your Underground Drainage System - French Drain Man

French Drain Man – Michigan’s Yard Water Drainage Experts. Masters in the art of constructing contained French drain systems & curtain drain systems that and fix your yard drainage problems for years to come. Over 30 years’ experience in solving yard water drainage problems in Oakland, Macomb, Lapeer and St. Clair Counties.

French Drain Man / Sherwood Landscape Construction, LLC
122 S Rawles St
Romeo, MI 48065
248-505-3065

[FRENCHDRAINMAN]

Best Pop Up Emitter FDM's V2.0 for Downspout Drainage

[linencannon]

This video was excellent and far better than the other one I tried to use, and the math even worked properly and wasn't overly complex!

[vaughnwesterby]

Thanks so much, keep em coming I’ve watched them all. I’m waiting for the video on what someone does with runoff who can’t tie in to a drain or catch basin. Thanks

[rotcod]

Yeah, so I've done the calculations, how does that help me size the drain pipe?

[eddylee]

Excellent! Thanks Robert! Going to be doing new gutters downspouts with French drain in the near future!

[piotrek]

I just calculated for Chicago area, with same size of a roof it would require 84.45 yard size "dry well" ;)) (our PF tabular number is 6.84 !!)
Thanks for the info and I wish you operate in Chicago area,

[Shrtpawz]

I have 14' of clay and can't get rid of it. Also have 7 1/2 acre field that drains to my 1 acre yard. My roof is 32' x 64' and I'm fighting the water with 3 sumps because my basement is to deep. Sand is only about 1-2' under my floor. I live in southwest michigan and can't wait for it to stop raining... My downs run into a 3' diameter concrete pipe 6ft deep. This is about 40' from my house. If you have any suggestions please let me know. Thanks!

[kolbypatrick]

It's not like we're getting a lot of rain here in Michigan this year!

[Whatsacivic]

The gallon raiting number is for gallons per hour? Gallons over 24 hour period? Per down spout? The info to get the number got me this far but not on selecting the right side pipe

[mark]

As a home owner is there a way I can do a perc test? look forward to the video on how to do a leaching field. Thanks for making this video.

[shlebmo]

When you do your area all you have to do is if it’s 40x100=4000
.0104x4000x5.1 for rainfall=212.16 gpm

[zaidabukhater]

How to calculate the number of Roof drain for 5 story building