Prev Previous Post   Next Post Next
Old 10-10-2011, 05:32 PM
mdvaden's Avatar
mdvaden mdvaden is offline
LawnSite Bronze Member
Join Date: Mar 2003
Location: Westside Oregon
Posts: 1,910
How to Botch Drainage in 365 days

Just had a chance to revamp a drainage problem this month. This one was unique, in that the prior "French drain" was installed about 1 year earlier.

Important things to keep in mind:

1. Never cover a French drain with sod or clay-like soil. That caps-off the drain line right away.

2. Routing perforated drain pipe or pipe with holes in front of trees, without using a barrier, invites roots to clog the system prematurely.

3. If the greatest source of excess water is the concrete patio, don't skip a drain line next to it.

We get about 37 inches of rain per year. So if the lawn was already getting 37 inches or rain, a patio means 74 inches of rain that the lawn has to (or can't) deal with. To omit that one drain line, means half a swimming pool's worth of rain allowed to cause problems.

The photo attached shows how the tree roots, in roughly a year, passed from the soil, through fabric in the trench, through the rock, through the pipe wall, and across the air space in the pipe: branching into a small wad of roots that would have continued to expand.

This scenerio is related to why 90% of the time, I do not do free drainage estimates, but schedule paid one-hour consultations to take a close look at the property and whether next door properties are part of the equation.
Attached Images
Photographer & Arborist

Coast Redwoods Info . . . Portland Landscape Pruning Consultation . . . M. D. Vaden Photography
Reply With Quote

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

Forum Jump

Layout Style:

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Grand View Media
All times are GMT -4. The time now is 02:05 PM.

Page generated in 0.11752 seconds with 10 queries