All Trampoline Country’s trampolines can be lowered into the ground. The following are important aspects to consider with respect to in-ground trampolines.
The shape of the trampoline is of utmost importance. While a hole can be dug for any shaped trampoline, the simplest hole to excavate would be for the rectangular trampoline.
Once your hole has been dug, it is important that the walls do not collapse, thus a retaining wall would need to be constructed. There are a number of options available for this. If a more permanent retaining wall is required, concrete may be considered, either poured or in the form of concrete blocks. If a less permanent wall is required than pressure treated wood could be an option.
Soil type, water table and drainage
It is important to ensure that there is sufficient drainage under the trampoline, thus soil type is critical. If the water table is not too high and the soil is sandy there may be sufficient drainage; otherwise a drainage system may be required.
Trampolines need to be level and have a solid base, thus the legs should be placed on concrete pads or a wooden base. If they are placed on a wooden base they should be clamped firmly to the wood. If they are placed on concrete or patio stones than a ¼” layer of rubber should be placed under the legs to prevent them from moving and being damaged on the concrete.
We recommend that the trampoline be elevated above the ground level by approx 3” - 5”. If the trampoline is level with the ground surface, the performance may be hampered since there is no “escape route” for the air being pressed down. For example, air is being pressed down as the bouncer lands on the surface of the trampoline. If there is no gap for air to escape it will return to the underside of the trampoline mat, thus reducing the bounce.
The following are some examples of in-ground trampolines.