Are Backyard Trampolines Safe? Safer With Four Rules

Most injuries come from two things: more than one jumper, and attempted somersaults. Nets and pads help, but the rules do more than the equipment.

By Zakaria October 8, 2026 3 min read Save to Pinterest

A round garden trampoline with a full safety net enclosure standing on grass — Photo: Hans, Pixabay Content License, via Pixabay

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The equipment is not where most of the risk is. Two behaviours account for the majority of serious injuries: more than one jumper at a time, and attempted somersaults. Fix those and you have done more than any net.

Where the risk actually is

This table answers the question on its own

Cause	Addressed by	Effectiveness
Multiple jumpers	A rule, not equipment	Highest impact
Somersaults and flips	A rule	High
Falling off the edge	Safety net	Good, for that one category
Landing on springs or frame	Frame padding	Good, if maintained
Falling onto hard ground	Siting, sunken install	Good
Equipment failure	Seasonal checks	Good

Why two jumpers is so much worse than one

A lighter jumper landing while a heavier one is pushing the mat down receives far more energy than they put in — the mat returns someone else’s force through their legs. That transfer is how a large share of trampoline fractures happen, and no net prevents it.

What a net does and does not do

It prevents falls off the edge onto the ground, which is a real and serious category. Worth having, and worth maintaining when the zip or the poles degrade.

It does not prevent collisions between jumpers, bad landings on the mat, or failed somersaults.

The false-security problem

A net is most dangerous when it makes people relax the rules. It is one layer, not the solution.

Size

12 ft — suits most family gardens, plenty for one child
14 ft — more margin from the edge, suits older or taller users

Bigger is safer per jumper because there is more distance to the frame. But it also tempts more than one person on at once, which works directly against the main rule. Allow clear space all round and overhead, well beyond the frame diameter.

Siting and installation

Level ground, clear of branches, washing lines and cables
Soft ground — grass or bark rather than paving or decking
Anchor it. Wind lifts and moves an unanchored trampoline a surprising distance
Sunken installation cuts fall height considerably, but needs drainage and airflow beneath

Seasonal checks

At the start of each season and after storms:

Springs — stretched or detached
Mat stitching, especially at the edges
Frame padding — UV degrades it until the metal is exposed, and exposed springs and frame are where many injuries actually occur
Anchors — ground pegs loosen in soft soil over a wet winter

Age

Guidance commonly advises against use under about six, when bones and coordination are still developing and the risk from jumping with others is highest.

Past that, it is less about age than supervision — and mixing significantly different sizes of child on one mat is the specific situation to avoid at any age.

Common questions

Are backyard trampolines safe?

They carry real risk, and most of it concentrates in two behaviours rather than in the equipment. Multiple jumpers at once is the largest single factor, because a lighter jumper landing while a heavier one is pushing the mat down receives far more energy than they put in — which is how most fractures happen. Attempted somersaults and flips are the other, because a failed one lands on the head or neck. Enforcing one jumper at a time and no flips removes most of the risk a net cannot.

Do trampoline safety nets actually work?

They prevent falls off the edge and onto the ground, which is a genuine category of injury, so they are worth having and worth maintaining. What they cannot prevent is the larger category — collisions between jumpers and bad landings on the mat itself. A net can give a false sense of safety if it leads people to relax the rules, which is the opposite of what reduces injuries. Treat it as one layer, not as the solution.

What size trampoline do you need?

A 12 foot trampoline suits most family gardens and gives one child plenty of room, while 14 foot gives noticeably more margin from the edge and suits older or taller users. Bigger is generally safer per jumper because there is more distance to the frame, but it also tempts more than one person on at a time, which works against the main safety rule. Allow clear space all around and overhead well beyond the frame diameter.

Where should you put a trampoline in the garden?

On level ground, with clear space all around and nothing overhead — branches, washing lines, cables. Soft ground such as grass or bark is better than paving or decking in case of a fall, and anchoring is essential because an unanchored trampoline can be lifted and moved a surprising distance by wind. Sinking it into the ground reduces fall height considerably, though it needs drainage and airflow beneath to work properly.

At what age is a trampoline safe for children?

Guidance commonly advises against trampoline use for children under about six, because their bones and coordination are still developing and they are most at risk when jumping with others. Beyond that, the risk is less about age than about supervision and the one-jumper rule. Mixing significantly different sizes of child on a mat at the same time is the specific situation to avoid at any age.

What maintenance does a trampoline need?

Check the springs, the mat and the frame padding at the start of each season and after storms. Springs stretch and detach, mat stitching fails at the edges, and UV degrades frame pads until they no longer cover the metal — exposed springs and frame are where a lot of injuries actually happen. Check the anchors too, especially after a wet winter when ground pegs loosen in soft soil.

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