From the equipment's free height of fall.

Each item publishes that figure.

Surfacing must attenuate an impact from that height.

Certification states a tested fall height.

Match the two figures, not the product names.

The tallest item sets the requirement.

It frequently costs more than the equipment.

Deck height drives the specification depth.

A small height increase can change the whole band.

Extent of the surfaced area moves with it.

Sites that price it late cut play value instead.

Test alternative deck heights during design.

It does not stay where it is needed.

Migration is worst under swings and slide exits.

Those are the highest risk positions.

Performance depends entirely on depth.

A topping-up regime has to be owned.

Depth checks belong in routine inspection.

Where performance must hold without intervention.

Wet-pour and rubber tiles do not migrate.

They are accessible from the day they are laid.

Initial cost is considerably higher.

Inclusive schemes need it as a matter of course.

A route a wheelchair sinks into is not a route.

When properly installed and compacted, yes.

It is the accessible option among loose fills.

Compaction and depth both have to be maintained.

Displaced fibre stops being accessible immediately.

Unitary surfacing removes that dependency.

Confirm the claim against the product's testing.

On low-fall equipment over turf.

They reinforce grass while letting it grow through.

Appearance stays natural once established.

Attenuation is limited compared with rubber.

Check the tested fall height before assuming.

Swings and climbers usually need more.

Depth, coverage and condition.

Loose fill depth is checked at wear points.

Wet-pour is checked for shrinkage and tearing.

Tile edges lift and become trip hazards.

Compaction under heavy use reduces performance.

It belongs in the same regime as the equipment.