
1/4 to 3/4 inch crushed rock is the best choice for leveling. |
Preparing the Surface
The EZ Pad modules can be placed on grass, dirt, or gravel, or any flat, level well supported surface. For best results, remove sod and prepare a level base. Panels can be drilled through for electrical conduit placement. You may use any size crushed rock up to 3/4 inch or pea gravel for leveling.
Levelness
The rule of thumb for levelness is 1" or less over 8'. An easy way to determine this is to purchase a straight 8' 2x4 (you can pick one out by looking down the length from the end, which will exaggerate any curvature), and if you don't have one, a bubble level. both can be had from your local home store for about $14.
Place the 2x4 on the location, and put the bubble level on the 2x4. If the bubble is not centered, raise the lower end until it is. If the end of the 2x4 is 1" or less from the surface, you are fine.
If not, it is possible to make a frame of pressure treated 2x4s and fill partially with crushed rock. If you choose to do this, please be sure that the EZ Pad fits inside, and not on top of the boards.
Levelness is primarily an aesthetic issue, because if the water line is not parallel to the edge of the hot tub, it looks wrong. The only time is presents a hazard to the hot tub is if either the jets are exposed which will mean water will be squirted out of the tub, or if the water intake is exposed, which will allow air to be pulled into the pump, which can damage it. However, it has to be really out of level for either of these things to happen.
Flatness
Flatness is more important, since EZ Pads are not absolutely rigid, and will conform to the underlying surface. The same solution of a frame of pressure treated lumber will resolve this issue as well. Again, if you choose to do this, be sure that the EZ Pad fits inside the frame, and not on top of it. |