Turf and Adjacent Rubber Flooring from the Same Subfloor

Two surfaces sharing one subfloor should also share one measuring datum: the plane both rest on. Measure the turf side as a full build-up and the adjacent rubber floor as a completed system, then compare. Neither the gym turf finished floor height nor the gym turf adjacent rubber flooring height means anything until both are referenced to that same plane, and a quoted gym artificial grass thickness cannot stand in for either.

Same-reference-subfloor comparison method step by step

1. Fix the reference. Treat the top of the common subfloor as zero for both sides and measure upward only.
2. Confirm what the turf figure contains. Establish whether the quote covers blades alone, the delivered roll, or the installed build-up, then use the total thickness as delivered.
3. Add only what is missing. Count a separate underlay once — and not at all if it is already inside the factory figure.
4. Read the adjacent floor as a system. Use its completed height, not a sum of parts inferred separately.
5. Subtract, never add. Turf-side height minus adjacent-side height gives the offset you need to transition.

Hypothetical example: 15 mm turf plus 5 mm separate layer vs. 20 mm adjacent floor

This is a calculation example, not a measured installation and not an endorsement of any particular underlay.

Conditions: one shared, level subfloor; turf total thickness 15 mm with factory padding included; a 5 mm separate layer added on site; adjacent floor finished height 20 mm; no other layers.