Inground trampolines DIY Installation Guide
Step 1. Dig the hole
Mark out a hole that is a few inches wider in diameter than your trampoline. This is to give you a little extra room when you place the trampoline in the hole.
Dig out 25cm of soil evenly across the entire hole. Then dig an inner hole in the middle that is 2ft or 60cm less in diameter than the trampoline size in a bowl shape to a depth of 90cm (about 3ft) for 12ft and 14ft trampolines and 75cm (about 2ft 6 inches) for 8ft and 10ft trampolines. This will leave a ledge onto which the trampoline frame will sit.
It’s hard to be precise with the hole measurement – the extra few inches will make it easier for you. This extra space will be back-filled at the end. Keep some of your excavated top soil close by the hole for back filling.
Step 2. Assemble the frame
Assemble the top and bottom sections of the trampoline frame, attach mat and springs and fix the retaining wall to the outside of the frame.
Attach springs at 12 o’clock position, then 6 o’clock followed by 3 o’clock and 9 o’clock first – this will give even tension and make it easier to fit the rest.
Step 3. Site the trampoline into the hole
Lift the trampoline into the hole and place on the ledge ensuring the frame is at the correct height. Then back-fill in the gap on the outside of the frame, compact the soil and re-turf.
Use the handle of your spade to compact the soil down as tight as possible when back-filling.
Step 4. Attach the vented pads
Finally attach the TDU vented pads to the frame & you’re ready to enjoy your in-ground trampoline!
Use a long screwdriver to help push the elasticated toggles down between the trampoline frame and the retaining wall in order to secure the pads to the trampoline.
Please check out the installation video for assembly. https://youtu.be/jkmbQXiwHHI