Multifamily countertop installation is a Division 12 scope that lives or dies on sequencing, not on the countertop itself. The work is straightforward: measure the set cabinets, fabricate the tops, install and seal them. The failure mode is a fabrication schedule that cannot keep pace with cabinet installation running on several floors at once, and a general contractor who finds out too late. This guide covers the scope, the materials, the templating and fabrication steps, the install sequence, seam and support details, and the specific commitments to require from the subcontractor before you award the work.
Countertops carry a long pole in the schedule that trim work does not. Once the template is taken, the clock runs for ten to fourteen days on stone before a top can be set, and the plumbing sub cannot trim out the kitchen sink until the top is in. Every floor that templates late pushes plumbing trim, which pushes final inspection, which pushes the unit turn. On a 200-unit project that lag compounds across the building.
What Division 12 countertop scope covers
Countertops fall under CSI MasterFormat Division 12, Furnishings, specifically section 12 36 00, Countertops. The scope on a multifamily interior finishes package covers kitchen countertops, bathroom vanity tops, and any island, peninsula, or bar surfaces called out in the unit plans. It includes field measurement (templating), shop fabrication, delivery, setting, seaming, sealing where the material requires it, and cutouts for sinks, cooktops, and faucet holes.
The scope sits between two other trades in the schedule. Division 6 finish carpentry sets the cabinets that the countertops rest on, and Division 22 plumbing fixture supply defines the sink that drives the cutout. Countertop scope cannot start until cabinets are set, and it cannot finish clean without the sink data. Draw those boundaries in the subcontract so no one assumes another trade owns the cutout template or the backsplash.
Backsplash treatment varies by specification. Some projects call for a 4-inch stone splash fabricated from the same slab as the top, which the countertop sub supplies. Others call for a full-height tile splash under Division 9, which a different trade installs. Confirm which model the drawings use before you scope the work, because a 4-inch stone splash changes the slab yield and the fabrication count.
Choosing the material: quartz, granite, solid surface, laminate
Material selection drives cost, lead time, and the fabrication and support requirements. Four materials cover almost all multifamily work.
| Material | Typical use | Standard | Notes for the GC |
|---|---|---|---|
| Quartz (engineered stone) | Class A and market-rate kitchens and baths | ANSI/ISFA 2-01, Quartz Surfacing Material | Consistent color, no field sealing, UV-stable pigments matter for sun-exposed units |
| Granite (natural stone) | Class A and value kitchens | Natural Stone Institute Dimension Stone Design Manual | Slab variation is real; approve the actual slabs, requires periodic sealing |
| Solid surface | Value baths, healthcare, workforce | ANSI/ISFA 3-01, Solid Surface Material | Thermoformable, repairable, integral sinks possible, no visible seam line |
| High-pressure laminate | Workforce and affordable housing | NEMA LD 3 | Fast fabrication, short lead time, post-form or square edge |
Quartz is the default for the Class A and market-rate multifamily market because the color runs consistent across a large unit count and it needs no field sealing. When you specify quartz for units with large south or west-facing glass, confirm the product uses UV-stable pigments. Some engineered surfaces discolor under sustained high-altitude UV.
Granite is a natural material, so two slabs of the same name are not identical. If the specification calls for granite on a visible run, review and approve the actual slabs, or a delivered top that reads darker or busier than the sample becomes a change order. Solid surface earns its place where a repairable, thermoformable surface or an integral sink matters, and it hides seams better than stone. Laminate belongs on workforce and affordable specifications where lead time and cost govern. Confirm any laminate is an intended specification and not a quiet substitution for a specified stone.
Templating starts the fabrication clock
Templating is the field measurement that turns set cabinets into a fabrication drawing, and it cannot begin until cabinets are fully set and level. A template taken over incomplete cabinet runs produces dimensions that move when the remaining cabinets adjust the wall and floor positions of adjacent runs. The rule is simple: wait for cabinet completion on the floor, then template that day or the next morning.
The order matters because the template starts the fabrication clock. Notify the countertop sub the day cabinet installation finishes on each floor so the template lands immediately and fabrication begins right after. A sub who cannot describe a specific process for same-week templating across several floors has not run a large production job.
On a project running cabinet installation on four floors at once, four floors template within the same week. That is the moment supplier capacity gets tested, which is why the fabrication step deserves its own scrutiny.
Fabrication: lead times and shop capacity
Fabrication lead time for quartz and granite runs about ten to fourteen days across most western US markets, measured from template to delivered top. That figure holds only if the fabrication shop has open capacity. On a large multifamily job, the real question is not the single-top lead time but whether the shop can run templates from several floors through fabrication at once without the lead time stretching past two weeks.
Ask the countertop sub two things before you award. First, who is the fabrication shop, and what is its capacity for simultaneous floor production. A shop that handles one or two floors at a time becomes the bottleneck on a 200-unit building. Second, what is the lead time for the exact product and color specified. Popular quartz colors from major manufacturers run longer in high-activity markets, so a general estimate is not good enough. The article on how to evaluate a countertop fabrication shop walks through the capacity and quality questions in detail, and the guide on what to ask before you award the work covers the prequalification side.
Get the lead time in writing at the time of template and have the sub communicate it to the superintendent. That single handoff lets the plumbing sub plan trim-out around a real delivery date instead of showing up to a floor with no tops set and burning a mobilization.
Install sequence and where it sits in the schedule
Countertop installation sits at a fixed point in the finishes sequence. Cabinets go in first under Division 6. Countertops template and set next. Plumbing trims the sink and faucet after the top is in under Division 22. Any backsplash tile follows. Getting that order wrong on even one floor cascades into the unit turn.
The setting crew levels the top on the cabinet boxes, shims where the cabinet run is out of level, and secures the top per the material’s method. Stone tops sit on a bed of adhesive at the cabinet rails and get mechanical support where spans or overhangs require it. The crew cuts the sink and faucet openings in the shop from the approved template, so setting is a placement and seaming operation, not a cutting one. Field cutting a stone top is a last resort that risks a crack, and on a production job it is a sign the cutout data was wrong.
Seams, support, and overhang
Seams and support are the two details that separate a clean install from a callback. Large island and peninsula runs almost always need a seam because a slab has a finite size. Seam placement is a permanent, visible decision, so require a seam placement plan for each kitchen configuration before fabrication. The plan should show the seam location relative to the layout, the edge, and any adjacent appliance or fixture. A seam dropped in the middle of a high-visibility island is a defect the developer and the resident see every day.
Support governs where the top can cantilever without cracking. The Natural Stone Institute and the engineered-stone manufacturers publish unsupported overhang limits, and a typical guideline allows an unsupported stone overhang of roughly 10 to 12 inches before the design needs corbels, brackets, or a support panel. Bar tops and island seating overhangs frequently exceed that, so confirm the support detail is drawn and supplied. A 15-inch seating overhang with no bracket is a warranty claim waiting to happen.
Sink support matters too. Undermount sinks in stone hang from the underside of the top and need a clip or rail system rated for the sink’s loaded weight. Confirm the sink attachment method is part of the sub’s scope so a full sink of water does not pull an undermount loose.
What to require from the countertop sub
Put these commitments in the subcontract or the prequalification, not in a hallway conversation:
- The fabrication shop by name and its capacity for simultaneous floor production.
- The lead time for the exact product and color specified, in writing.
- A seam placement plan submitted for approval before fabrication on every run that needs a seam.
- Confirmed sink cutout dimensions from the Division 22 fixture supplier before fabrication starts.
- The support detail for every overhang beyond the material’s unsupported limit.
- Proactive communication of the delivery date to the superintendent and the plumbing sub at the time of template.
- Current general liability insurance and prequalification documentation.
Sink cutout coordination is the one that quietly breaks schedules. The fixture supplier owns the sink model and the manufacturer’s cutout template, and the fabricator cuts to it. When Division 12 and Division 22 sit under separate subcontracts, confirm the sink data transferred and was received before you authorize fabrication. A top cut to the wrong sink needs a field modification that risks cracking stone, or a refabrication that adds two weeks. Where both scopes sit under one subcontract, the countertop and plumbing fixture supply coordination is internal and the handoff risk goes away.
Regional notes for the western states
The sequencing discipline is the same across every western market, but material and logistics vary. In the high-activity Texas metros, popular quartz colors run longer lead times, so supplier capacity is the first question. Colorado, Utah, and high-elevation markets see strong UV exposure, which makes UV-stable quartz pigments worth confirming on sun-facing units. New Mexico projects, especially in Santa Fe, sometimes specify regional materials like honed travertine or warm-toned quartz to match Pueblo and adobe design character, and historic design review can constrain the selection, so confirm with the architect before procurement. Pacific Northwest projects in Oregon and Washington follow the same quartz-default pattern as the rest of the region. Across all of them the fabrication clock and the cabinet-then-countertop-then-plumbing order do not change.
Common questions
When does countertop templating happen on a multifamily project? Templating happens the day cabinet installation is complete and level on a floor, not before. A template taken over unfinished cabinet runs produces dimensions that shift when the remaining cabinets are set, which forces a refabrication.
How long does countertop fabrication take on a multifamily project? Quartz and granite fabrication runs about ten to fourteen days across most western US markets, measured from template to delivery. Solid surface is often faster. Laminate is faster still. Confirm the lead time for the exact product and color specified, not a general average.
What should a general contractor require from a countertop subcontractor? Require the fabrication source and its simultaneous-floor capacity, the lead time for the specified product, a seam placement plan for approval before fabrication, confirmed sink cutout dimensions from the fixture supplier, and current insurance and prequalification documentation.
Who provides the sink cutout dimensions for countertop fabrication? The Division 22 plumbing fixture supplier provides the sink model number and the manufacturer’s cutout template. The countertop fabricator cuts to that template. On projects where the two scopes sit under separate subcontracts, the general contractor has to confirm the information transferred before fabrication starts.
Talk to Innergy about your Division 12 scope
Innergy Interiors covers countertop fabrication and installation under Division 12 for multifamily construction across the western states, coordinated with cabinet installation and plumbing fixture supply under one subcontract. If you want Division 12 countertops as a standalone scope or as part of a full interior finishes package, contact us and we respond within one business day.
Related: Countertop Edge Profiles · How to Evaluate a Countertop Fabrication Shop · Evaluating Countertop Fabricators · Division 12 Countertops · Multifamily Interior Finishes