The system recognises a worktop by the material type, not by the thickness of the board. Thickness used to be the criterion, and while worktops were 28 and 38 mm it matched. With thin worktops of 16, 18 and 20 mm the match ended: such a board was treated as ordinary chipboard.
Three different questions, three different lists
Belonging to the worktop group answers not one question but three, and the answers do not coincide:
- Is it nested as a worktop — its own trimming and one-sided nesting. This covers every worktop, thin ones included, and also inset handles and wall panels.
- Does it have postforming — the bent edge underneath. Inset handles and wall panels are excluded here: they have no postforming, yet it used to be drawn on the drawing and in 3D where none exists in reality.
- Which sawing tariff applies. Handles and panels are excluded here too: their sawing is charged by thickness, as before.
The lists are kept apart on purpose. Two of them currently match item for item, but they answer different questions: as soon as a worktop without postforming appears, or a panel that someone decides to charge at the worktop tariff, they diverge.
What it means in practice
- Thin worktops of 16, 18 and 20 mm are handled like thick ones: the same trimming, edging and services.
- Inset handles and wall panels are nested by worktop rules but without postforming and without the worktop sawing tariff.
- Sawing and edging services are charged unambiguously: a material falls into one group, not into two at once.
If a material behaves differently from what you expect, look at its type in the catalogue rather than at its thickness.