Tenant Improvements Fail When the As-Builts Are Treated as Truth

Tenant improvement projects are often reviewed on compressed schedules because the space needs to reopen quickly. That urgency creates a dangerous habit: teams treat old as-builts as if they are measured survey data. They are not. They are a record of what someone believed was installed at the end of a past project.

The best TI reviews mark every critical dependency as either verified, likely, or unknown. Helonic supports that workflow by surfacing cross-discipline assumptions that deserve field confirmation before demolition or rough-in.

Common TI Assumptions That Break

The most painful TI conflicts are not always visible in the finish plan. They show up above ceilings, inside shafts, at electrical panels, and around plumbing stacks. A minor-looking layout change can fail when existing capacity, route, or access is not there.

For a deeper look at occupied-building issues, see the renovation vs new construction guide and the tenant improvement coordination breakdown.

• Panel capacity is assumed from old schedules that were never updated.
• Existing duct routes are shown but not checked against field obstructions.
• Plumbing risers appear available but are offset above or below the space.
• Rated partitions were modified by previous tenants.
• Ceiling heights ignore existing beams, devices, or abandoned systems.

Review the Gap, Not Just the New Work

A strong TI drawing review compares the proposed work to the existing condition record and then identifies the unknowns. The output should be a preconstruction verification list, not only an RFI log.

Helonic helps by giving teams a structured way to find and document those gaps early, while there is still time to survey, redesign, or price the impact.

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