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.
While digging remember to make a slope that runs away from house.
Dig a trench along the desired route of the drain pipe.
Dig a trench about 6 inches wider than the drain pipe you plan to bury and dig the hole deep enough so that the drainpipe sits 3 inches below grade.
Lay the downspout drain pipe in the trench.
Weisman recommends extending the trench at least 8 feet from the downspout if there s available space.
Make the trench the same width as the downspout pipe and about 12 inches deep.
The end of the trench next to the house will be 18 inches deep and the far end will be 30 inches deep.
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.
Step 1 dig a sloping trench from your downspout to a point 8 feet away.
Dig the trench 15 inches wide down the entire length.
Create a fall of 1 8 inch per foot of drain line.
I settled on about a foot of depth enough to keep it well buried but obviously it will still freeze in winter.
We found that the trench needs to be 10 12 inches deep with about a 2 inch slope.
We researched how long and deep the trench should be.
First thing first dig a trench.