2% slope and levelling layout have me confused

noleaf

Garden lurker
Joined
Jan 29, 2025
Messages
1
Reaction score
0
Points
1
Hi everyone. I'm undertaking a flagstone paver project. I've already got the gravel and sand I ordered to put after digging out, but I'm confused as to what the best way to leveling is to get that 2% slope. Any advice would be much appreciated
 

Attachments

  • Screenshot_20250129-194124.png
    Screenshot_20250129-194124.png
    734.3 KB · Views: 15

Rhodie Ranch

Garden Master
Joined
Nov 19, 2009
Messages
3,618
Reaction score
6,096
Points
333
Location
Southern Washington State, 8b
2% slope is about 0.12" per foot. So that would be 1.2" decline in a 10' downhill distance.

When we want slope on any surface, we add more sand and gravel to the head (start) of the project and then gradually go out thinner as we move out from the start/head.

For drainage, you've got built in drainage simply due to the sand and gravel base. A slope will insure that there will not be pooling at the head of the pavers. Unless it absolutely pours, then that will take time to percolate.
 

flowerbug

Garden Master
Joined
Oct 15, 2017
Messages
17,300
Reaction score
27,634
Points
427
Location
mid-Michigan, USoA
2% is 2 in 100. so figure your distance and run your taught string. use a level to find out that it is indeed level and then adjust one end of the string down whatever distance you need to get the desired grade. once you have that done you can put down rails to drag a straight edge.

read up on what bases to use and how much compaction you'll need to make sure you don't get sagging in your project. you may need to compact and drag the straight edge a few times to get it right.

of course drainage and water flow are always issues to consider.
 

Latest posts

Top