How to stop rain water from washing out your manufactured home foundation

I had water running down hill under my manufactured home that was starting to wash out the foundation system. We installed a French Drain on the high side of the house.

A French Drain is nothing more than a trench that goes across the end of the home where the water is coming from. Its depth will depend on the amount of water you want it to handle. At my place we trenched down about 5 feet.. put about a foot of drain field rock on the bottom... above that layer of rock we put perforated pipe with the holes
pointing up. We extended the trench and pipe around to the low side of the house and let it break out of the ground at a steady drop. We covered the pipe with six inches of rock, then a layer of septic field sand filter paper, and then
rock to the top.

PLAN CUT VIEW OF FRENCH DRAIN


This creates a drain that will carry the water around the house and drop it off the low side... The ground water drains from the surface into the gravel, this water flows through the gravel slowly into the perforated pipe which acts like a
"highway" removing water from the trench

We are fortunate as the low side of our property drops into a lake. You may run into a problem is there is another home or other fixture on the low side that your drain water would damage. . French drains can lead to dry wells or environmentally-friendly rain gardens where the extra water is held and absorbed by plants, when city water
systems, or other waste water areas can not be used.

VIEW OF FRENCH DRAIN FROM THE TOP

FRENCH DRAIN WITH BASE ROCK AND PIPE

For more details see:

BUILDING A FRENCH DRAIN TO STOP MOISTURE UNDER A HOME

How To Install French Drains for Yard Drainage
Wikipedia on French Drain
French Drains cure Saturated lawns & basement flooding