I live in minnesota and the frost depth last year was 7 way deeper than i could ever dig my trench.
How deep to bury gutters.
As a consequence the pipe trench will be quite shallow at the beginning and much deeper at the end.
We researched how long and deep the trench should be.
Make the trench the same width as the downspout pipe and about 12 inches deep.
Weisman recommends extending the trench at least 8 feet from the downspout if there s available space.
And the length is how long you want it but far enough away from the building we decided we did not want less than 5 feet.
Dig the trench 15 inches wide down the entire length.
If your yard is flat or doesn t naturally have the desired slope dig the trench deeper as it extends away from the house to create the slope.
First thing first dig a trench.
While digging remember to make a slope that runs away from house.
Create a fall of 1 8 inch per foot of drain line.
The deeper the trench you can dig the better.
Lay the downspout drain pipe in the trench.
Step 1 dig a sloping trench from your downspout to a point 8 feet away.
Dig a trench along the desired route of the drain pipe.
The end of the trench next to the house will be 18 inches deep and the far end will be 30 inches deep.
We found that the trench needs to be 10 12 inches deep with about a 2 inch slope.