What's Needed for Drain Tile / French Drain
I am getting conflicting information and I thought some experienced folks like yourself may be able to help.
We have a new home (2007) with a walk-out basement. The previous owners put in a landscaping berm with trees, shrubs, plants, etc. in the back corner of the property. The berm cuts off the natural flow of water to the main sewer drain which sits between my neighbor's and my backyard. The grass continually stays wet and swampy in this part of our yard. (Kids love all the frogs!)
We plan to put in a buried collection tub with drain tile leading from the tub to the main sewer drain. We may even bury one of our downspouts and drain tile that to the collection tub, then out to the main sewer drain.
Ground is clay. Metro area of Minneapolis. We have drain tile around our foundation with a sump pump does not run too often.
We had a few contractors out to give us quotes and we are going to be doing it ourselves. One said to dig a trench, toss in some pea gravel. The plastic tubes get clogged and don't work. The other said he would use drain tile pipe with the cloth but pea gravel would not be needed because the ground is clay.
1) Is pea gravel necessary with clay soil?
2) Can anyone offer suggestions on which method would be best? What are the steps and "layers" of liners, plastic, pipes, gravel, socks, top fill, etc.?
(Everywhere I read, there seems to be different methods.)
Thanks much for your help.