However, due to the extreme closeness of my neighbor's house (only 10-12 feet away), combined with the fact that the shared turf in between our homes is basically at the same grade as the tops of our foundations, I cannot easily create any kind of slope.
Here's a drawing of the current situation, as well as the problems I just mentioned. It shows why I cannot simply create a slope and call it a day.
https://I.imgur.com/830jLZl.jpg
It seems like the only option is to go all-out and install a French Drain starting about 2 feet deep (and getting deeper as the pipe slopes downward), at around 3 feet away from the side of my house.
Is there a better and/or easier option? [To reiterate, the key limitations are: A) I need to re-grade the first ~3 ft. of soil next to my house to create a slope, and B) I can't change the height/level of the turf in between my neighbor's house and my own.]
If not, then please take a look at the following drawings, and critique my plan. I did a lot of research and spent a lot of time planning, but I truly value anyone's opinions, as I am a complete amateur in this.
Front view (overall view and close-up view): https://I.imgur.com/fDSKsh8.jpg
Side view: https://I.imgur.com/ZQ2h3ec.jpg
Some random points (reference the pictures for easier understanding):
- I will be using perforated PVC pipe, not corrugated plastic tubing.
- I don't plan on using any sort of glue to adhere the sections of PVC together; I don't think that will be a problem, will it?
- For the time being, I will be using cheap black plastic edging along the rock bed. However, I believe that the way I've designed the layout will make it very easy to switch it out for stone edgers at a future date, as the edging will already be sitting on rocks, so I will just have to sweep some of the larger River Rock out of the way to reveal the Pea Gravel, and then set the stone edgers on top of that.
- I will use varying sizes of gravel around the PVC pipes in order to create a natural "filter". I will do this instead of using a "pipe sock", as some people do......
- ....But! I'll also be lining the trench itself with high-quality, extra-permeable, extra-durable landscape fabric. I debated whether or not to do this for a long time, but ultimately decided to, because A) it will be an additional layer of filter to keep soil from reaching the pipe, and B) the fabric I'm using is extremely permeable (according to the label), so it shouldn't impede water flow at all.
- I am considering also covering the top of the trench with a layer of the landscape fabric, above the top layer of pea gravel, and under the decorative river rock, to help prevent debris from finding its way down into the trench. I am undecided on this, however.
- I spent a lot of time debating whether to use solid plastic sheeting on the sloped section in place of the permeable landscape fabric. I currently am leaning toward the landscape fabric, as it is much healthier for the soil underneath, and also because the soil is very highly clay-based, meaning rain water should still run down the slope quite well and not be soaked directly into the soil. However, the plastic would obviously be absolutely best in terms of repelling water and sending it down into the trench, so I'm still struggling with this decision.