DIY Instructions for 15 foot Inground Trampoline!
We just got started landscaping our yard and the trampoline was one of the first things we wanted to get done. It’s super windy here in the springtime and we really didn’t want our trampoline to blow away in the wind, like so many of our neighbors warned might happen. Luckily for us, my hubby helped his brother and sister-in-law, from All Things Thrifty, install their trampoline about 5 years ago.
You can find their tutorial here. We followed most of their instructions, but we did make a few changes since our trampoline is a little bit different than theirs. It’s definitely more cost-effective to do this yourself. You can buy kits, but they are pricey, and we did this for a fraction of the cost, and it only took 3 hours!
Here’s what you’ll need…
5 – 12’ x 2’ Corrugated steel roof panels 15 – 2” x 4” x 10’
100 self-tapping screws
30-40 wood screws
Level Drill Miter Saw Hammer
1- Have your landscaper, or DIY, dig a hole 3 feet deep and 1 foot wider than your trampoline. So for our trampoline, the hole was 16’ across the diameter. Our landscaper charged $75 an hour, and the hole was finished in an hour. Prices will vary though, depending on the area you live in.
2- Make sure the bottom of the hole is level so your trampoline will be too. The ground was rock solid, so we didn’t feel like we needed anything under the legs of our trampoline, and our landscaper agreed.
55 1/2” long each. Make sure you measure yours first since your trampoline might be different from ours.
4- Use your self-tapping screws to attach your pre-cut 2×4 boards to the legs of the trampoline. Your top board should be at least 4” down from the top bar of the trampoline, to allow the air to escape while jumping.
We alternated from 1 to 2 boards per section. See the picture for visual aid. We skipped the bottom board where the trampoline leg was raised and just tapped the screws into the legs in those areas, instead of attaching aboard.
5- Take the corrugated sheet metal and, starting an inch from the top of the top 2×4, begin screwing the metal into the frame you just built with the 2×4’s. Secure on the top and bottom of the sheet metal.
6- Continue wrapping the sheet metal, overlapping by 2 feet on each section to strengthen the walls.
7- To give the top a finished look, and to prevent small toes from being caught on the sheet metal, use the remaining 2×4’s to trim the top of the sheet metal. Cut each 2×4 at an 18-degree angle. Your boards will have a trapezoid shape with an 18-degree angle where the boards meet.
8- Use the wood screws to attach the flat boards to the boards on the frame.
9- Put the trampoline back into the hole, and backfill the hole so the outer walls of the trampoline are covered.
10- In the center backfill up against the sheet metal halfway up and sloping down to the center.
11- Put your trampoline back together and enjoy! The final cost of this project was about $255. The materials were about $180 from Home Depot, and we paid the landscaper roughly $75 to dig the hole and backfill.. It’s definitely worth your time to DIY! You might like these other DIY projects. Click on the picture for the links!