This trench would follow the natural contour of the ground.
Gutter drain pipe depth.
In many instances i would dig a trench only 16 inches deep.
If you have hard clay soil or rocky soil you can use an electric hand held demolition hammer tool to dig a trench.
Drain pipe slope maintaining a depth of 12 to 18 inches is best for drain pipes but the depth of the pipe may vary in order to maintain a downward slope which is critical for proper drain functioning.
Buried or underground roof drainage downspout defects clogging overflowing holes corrosion leaks that cause wet basements or crawl areas proper installation of buried downspout extensions proper installation of french drains seepage pits at flat sites gutter downspout defects cause wet basements crawl areas questions answers about installing maintaining repairing buried roof.
If you live in a cold climate trapped water may freeze and burst the pipe.
For the garage i used a downspout adapter without a leaf guard since there aren t trees close enough for that gutter to get clogged up.
This is a great demolition hammer tool to chip out rotten concrete.
I usually dig a trench about 12 to 14 inches deep for downspout drain lines.
The trench should be at least 6 inches wide and slope down slightly 1 to 2 inches per length of pipe so water drains away from the downspouts.
Since my in ground pipe ran right past the garage i had the garage downspout dump in as well.
Continue until you have completed the trench.
It is most effective to place a drainage pipe in the ditch at a depth of 12 to 18 inches and then fill the ditch with gravel.
The solid particles may eventually clog the pipe.