What defines a treatment zone?
Zones may be informed by observed response, levels, foundation or slab geometry, loading, ground profile, investigation findings, water pathways, access and the relationship with adjacent elements.
Why can the treatment area differ from the visible damage?
Surface symptoms may not align exactly with the subsurface mechanism. Investigation may show that support loss extends beyond a crack, or that visible distress includes areas requiring a different response.
Can quantities be fixed before work?
Some inputs can be estimated from geometry and investigation. Actual delivery may also depend on variable voids, ground response, material pathways, obstructions and the agreed stopping or acceptance criteria. The commercial basis should explain how uncertainty is managed.
What controls quantity during delivery?
- Defined treatment grid, depths and sequence.
- Installation parameters and observed response.
- Survey or other agreed monitoring.
- Maximum movement, pressure or consumption limits where applicable.
- Hold points for unexpected conditions.
- Recorded approval for scope changes.
Does more material mean a better result?
No. Quantity is a production record, not a stand-alone measure of engineering success. Verification must relate to the stated objective and acceptance criteria.
How should variations be handled?
The proposal should define assumptions, inclusions, provisional quantities, unit or change mechanisms, notification thresholds and who can authorize a revised zone or quantity.
What should the completion record show?
It should map the installed work, quantities, observations, deviations and verification results to the same site reference used for the baseline and approved scope.