How to Install an In Ground Trampoline – with or without margaritas

6 Sep

Everything you never wanted to know about correcting an incorrectly installed in ground trampoline. Boing!

We inherited an in-ground trampoline when we bought our house earlier this year and its been a great activity for our kids.  And the grown-ups too.  And that brings us to our project today.  This grown-up caused about 4 springs to rip off into the air at about mach 5.   NORAD now tracks them in orbit. 

Needless to say we ordered a new trampoline mat and springs to replace the ruined ones from www.funspot.com.  Highly recommended if you need replacement parts and I think the least expensive place on the web.  Something you will find out about this SAH dad is that I am frugal, or as my wife translates “cheap”. 

After receiving the new mat and springs we went to install them only to realize the frame had torqued and was 4″ too wide in one direction across than the other.  The reason?  The original homeowners did not install a retaining wall in the trampoline pit and therefore over 4.5 years the sides slowly collapsed in on the frame bending it out of shape.  Lucky us, we had a surprise Home Depot project.  Yea!

Because I am so “frugal”, we decided on the following method for a retaining wall.  Its cheaper and less permanent if you ever want to lose the tramp and fill the hole in or convert it to a hot tub.  Here is how we did this thing:

First we dug the hole out wider and took the old frame out.  Once out, it pretty much self-adjusted back into shape.

 IMG_2566

We fit the frame back in the hole to make sure it was round and everything was going to fit up.  Note the white spray paint where we marked the location for the 4×4 posts.  The hole had to be widened by 4″ all the way around to accommodate the posts that were going in.

Next we rented an auger from Home Depot with an 8″ bit and dug 12 holes for 12 48″ pressure treated 4×4′s to be cemented in to hold back the retaining wall.  This wall would be built of 36″ high welded wire fence wrapped on the outside with 36″ silt fence wrapped outside of that.  See below. 

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my sweet wife pulling a string to make sure the posts across from each other are level

 
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The 4x4's laying on an angle are just for support till the concrete cures.

 After the 4×4′s cured, I cut two 2×4 horizontal supports to fit between each post.  Use a radial miter saw to cut the angles as it saves a lot of time.

 IMG_2582

Next I bent the remaining top 4 or so inches of welded wire fence over the top and tacked both sides at the top with fence staples.  I then wrapped the loose silt fence over that and stapled it in place.

IMG_2581  IMG_2585

Last, back fill the trench between the wall and the dirt.  Stomp it down and you’ll notice the wire bulge out some.  Acceptable give in my opinion.

IMG_2586

We smoothed out the bottom and lined it with the remaining silt fence sans attached sticks.

IMG_2587

Colorado is a very dry climate - the evaporation rate is higher than the precipitation rate so I didn't worry too much about drainage other than grading the top away from the hole.

 Next drop that frame in the hole, assemble, add springs, mat and voila!

 IMG_2588

Lets see how cheap I really am! 

Silt fence                       $30

Welded wire fence    $35

12 PT 2x4x8′s              $36

6 PT 4x4x8′s                 $48

box of screws               $5

box if fence staples     $3

auger rental                    $46

6 bags quickcrete          $27

Total Project Cost         $230.00

I am happy to respond if you have any questions.  Have fun!

Chuck Norris installs in-ground trampolines with a roundhouse kick to the kit to assemble it then he stares it down..literally, he stares at it till is sinks into the ground with fear.  It usually only takes about 3 seconds.

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16 Responses to “How to Install an In Ground Trampoline – with or without margaritas”

  1. Brian Towers September 17, 2009 at 6:59 pm #

    I bought mine for $300.00, had it together in about 1 hour, and it came with a safety net around the top. when are we going to the movies?

    • nocodad September 17, 2009 at 10:17 pm #

      Yes, but mine is in the ground and therefore cooler.

      What movie?

  2. Trampoliner September 21, 2009 at 7:06 pm #

    Nice post!

  3. Armand November 7, 2009 at 9:06 pm #

    How big was the trampoline you installed?

  4. LORI SHAW April 28, 2010 at 9:51 pm #

    LOVE YOUR WEBSITE YOU EXPLAINED IT PERFECT AND I LVED THE PICS SOME PEOPLE ARE SO NARROW MINDED I’VE SEEN MANY TRAPOLINES GONE IN STORMS AND TO ME THIS IS MUCH SAFER THAN THE NET AND ITS AWESOME TO HAVE IN YOUR OWN YARD!THANK YOU SO MUCH FROM HERE IN TEXAS!

    • tcgile August 28, 2010 at 6:11 am #

      Lori Shaw…I am in the Dallas, TX area. Are you near or in Dallas? Would you happen to know someone who I could hire to set up an in-ground trampoline for me???

  5. Green Trampoline Plea May 2, 2010 at 12:39 pm #

    Slightly off topic perhaps, but a request for people to think about the ethics of purchasing cheap trampolines. Do try and consider, for example, the things your product is made from, the conditions of the factories where they’re manufactured and the green credentials of the retailer. Oh, and try to repair your trampoline rather than throwing away. Thanks!!!!

  6. Julia Cregor May 29, 2010 at 5:38 pm #

    How well is your trampoline holding up after installing it in September?

  7. Tom Honka June 6, 2010 at 5:03 am #

    How did you attach the 2×4′s to the 4×4′s? How much time did it take to complete the project.

    • nocodad June 6, 2010 at 10:11 pm #

      I used decking screws. One on top and one on bottom toe nailed in on each side. I think it took 2-3 weekends to complete the project.

  8. tcgile July 24, 2010 at 3:05 am #

    Is there anyone in the Flower Mound area, NW of Dallas that could install an in-ground tramp for me? My son wants a large circular type…The in-ground are so much better looking. We have a large, open space in our backyard. If anyone replies to this, could you give an approximate labor charge?? thanks, tcgile

  9. Norika Wyatt Blanton October 7, 2011 at 2:36 pm #

    Since you were lucky enough to already have the hole dug…how much do you think that would cost?

    • nocodad January 10, 2012 at 3:05 pm #

      A couple hundred perhaps? You can rent a small bobcat from a rental supply place that would make it easy or hire a couple high school kids to dig it out. Thats what the previous owners did.

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