Interior finishes covers an unusually wide range of items for one trade section — ceilings, millwork, wallcoverings, toilet partitions, lockers, signage — and the risk isn't any single product on that list. It's that the supply-versus-install split changes item by item within the same section, sometimes within the same paragraph, and a section that reads as one continuous scope is actually a dozen separate assignment questions stacked on top of each other.
This is a working list of where those questions actually get answered, built from what shows up across real Canadian ICI tenders. Not a specialties catalogue — a list of the specific splits worth confirming before the number leaves the office.
What's reliably yours
- Suspended acoustical ceilings — grid and tile systems per the reflected ceiling plan and finish schedule, including trim, transitions, and seismic requirements where specified.
- Architectural millwork and casework installation — installation of shop-fabricated millwork, running trim and standing-and-running woodwork. Extract the supply-versus-install split per item, since it changes item by item within the same schedule rather than applying uniformly.
- Wall coverings and special wall surfacing — vinyl and textile wallcoverings, acoustic panels and specialty surfacing per the finish schedule.
- Interior specialties — toilet partitions and accessories, wall and corner protection, lockers and signage: the Division 10 items the tender assigns to this trade. That assignment isn't automatic, so confirm it rather than assume every Division 10 item lands here by default.
- Entrance mats and grilles — recessed entrance mats, frames and foot grilles. Extract the recess depth and who forms it, since the recess itself is concrete's work and pricing the frame without confirming who built the pocket it sits in is a classic miss.
- Interior protection — temporary protection of finished floors, walls and vertical transportation where the documents carry it as its own scope: materials, duration, and who maintains and removes it.
Where the fight actually happens
Demountable and operable partitions
These are often their own supplier-installed system entirely, priced and scheduled separately from the standard finishes install labour that covers the rest of the section. Extract the assignment explicitly rather than assuming it folds into the wallcovering or millwork line just because it appears in the same part of the spec — a supplier-direct system with its own commissioning requirements is a different bid altogether.
Ceiling clouds and specialty ceilings
Wood, metal, felt and baffle systems are premium products with genuinely long lead times, and they need to be priced and ordered as their own line items rather than folded into a standard acoustical ceiling allowance. Missing the lead time on one of these is a schedule problem long before it's a cost problem — confirm it early enough that the order can actually go in on time.
The other half: what isn't yours, even when it looks close
- Gypsum board assemblies and framing — drywall's own trade. This scope finishes surfaces that drywall has already built or that stand independent of it; it doesn't include building the wall itself, even where the two trades' work sits inches apart.
- Flooring and painting — separate trades with their own finish schedules and sequencing. Where this scope depends on when flooring or paint actually runs — and it usually does — that dependency needs to be confirmed rather than assumed from a typical sequence.
- Casework fabrication when supply is another's — when the documents split supply from install, shop fabrication and finishing belong to the fabricator. This trade's obligation starts at delivery and installation, not at the shop drawing stage.
Five things that hide outside the RCP and finish schedule
- Seismic and engineering requirements for ceilings. Seismic categories, perimeter bracing and compression posts carry real engineering cost, and that requirement is usually stated once in a general note rather than repeated on every ceiling detail where you'd expect to see it.
- Ceiling plenum congestion. Overlaying the reflected ceiling plan against the mechanical drawings — not just reading the RCP alone — is what reveals a tight plenum that will slow grid installation and force sequence changes a floor-plan read never suggests.
- Backing and blocking requirements. Accessories, partitions and wall protection all need backing, and the documents put that duty in an inconsistent place — it's usually drywall's wall, but when the backing is missing at rough-in, it becomes this trade's problem to solve on schedule.
- Attic stock and spare tiles. Percentage requirements per product are stated one line deep inside each individual section rather than gathered anywhere obvious, which is exactly why they're easy to price zero for by accident.
- Owner-supplied items. OFCI accessories and equipment this trade installs need their supply-versus-install language checked per item, not assumed from whichever item you happened to read first.
Who you're actually sharing the ceiling with
| Trade | What to reconcile before you price |
|---|---|
| Mechanical & electrical trades | Fixtures, diffusers and sprinklers in the grid — layout ownership, cutting, and who moves what when the RCP and services collide. |
| Drywall trade | Bulkhead and soffit interfaces with the grid, plus backing inside walls for this trade's mounted items. |
| Flooring trade | Sequence at millwork and partitions — what installs first decides scribe and base conditions. |
| General contractor | Conditioned space and dust control before ceilings and wallcoverings go in, plus attic stock handover at closeout. |
The pass that catches most of this
Read the finish schedule and the reflected ceiling plan together, then go back through each specialty item — demountable partitions, specialty ceilings, entrance mats — specifically for the supply-versus-install language rather than assuming the section's usual pattern applies. The finish schedule tells you what to install; the item-by-item split scattered across a wide section is what turns a correct product list into a bid that doesn't get disputed at closeout.