I realized that the sunken trampoline I referred to in the trampoline buyers guide is a strange animal to many people. I was going to write an article about it, but just now happened to stumble upon an blog post over at little green fingers that covers everything you need to know rather nicely.
They have pictures of a trampoline sunken right down to the ground level, which clearly illustrates the safety benefits of this approach.
A good point they make is that, particularly if you have a larger trampoline, there is quite a lot of digging to be done, and when you get down to the subsoil it can become hard work rather quickly. So you may want to consider hiring a guy with a small digger for the job.
A few other cool tips include:
- Get a model suitable for digging it down (ask your seller/merchant)
- Take drainage into account
- Use top soil to form a doughnut around the trampoline that will disguise it, when viewed from a distance
- Turf the area
Following the rules offered in the article should set you up with a solid foundation for a sunken trampoline.