The previous article on interior finishes master schedule integration covered the conceptual framework for scheduling finishes into the multifamily construction sequence. This article provides the specific duration tables, predecessor logic, and critical path analysis that scheduler-level detail requires. These figures are based on Innergy’s production experience across multifamily projects from 24 to 400 units in the western US markets and represent achievable durations with a qualified finishes sub running two crews per floor in standard residential unit configurations.
Duration table by scope item
The following durations apply to a standard 30-unit residential floor with two installation crews per scope item. Adjust proportionally for floors with significantly more or fewer units, and add ten to fifteen percent buffer for floors with more than four distinct unit types.
Division 6 cabinet installation. Four to six calendar days from delivery confirmation to installation complete on a 30-unit floor. Day one and two cover delivery and staging. Days three through five cover installation of all unit types, assuming a standard layout with eight to twelve cabinet boxes per unit. Day six is available as buffer for complex unit types or configurations requiring non-standard installation.
Division 12 countertop sequence. Template measurement: one calendar day for a 30-unit floor after cabinet installation is confirmed complete. Fabrication: ten to fourteen calendar days, non-compressible. Delivery and installation: one calendar day after fabrication complete. Total elapsed time from template to installed countertops: eleven to fifteen calendar days.
Division 9 LVP flooring installation. Three to five calendar days for a 30-unit floor with two flooring crews. Day one covers substrate inspection and documentation, with any self-leveling underlayment application if required. Days two and three cover LVP installation. Days four and five cover trim installation, transitions, and base installation. Tile in wet areas adds one to two days depending on tile complexity.
Division 10 accessories installation. Two to three calendar days for a 30-unit floor after paint and flooring are confirmed complete. Day one covers toilet accessories and mirrors. Day two covers wire shelving. Day three covers any signage, mailboxes, or fire protection accessories on the floor.
Division 11 window treatments. Measurement: one calendar day for a 30-unit floor. Lead time for standard products: one to two weeks. Installation: two to three calendar days after delivery.
Division 8 shower doors and mirrors. Measurement after tile complete: one calendar day for a 30-unit floor. Fabrication lead time: two to three weeks for frameless, one to two weeks for semi-frameless. Installation: two calendar days after delivery.
Division 22 plumbing fixture delivery. Coordinated with plumbing sub’s trim-out schedule, not an independent scope duration.
Predecessor logic for the Primavera or MS Project model
The following predecessor relationships should be modeled in the master schedule. All relationships are finish-to-start unless noted.
Cabinet installation predecessors: drywall complete (FS), prime coat paint applied (FS). Cabinet installation drives: countertop template (FS, same-day trigger, zero lag).
Countertop template drives: countertop fabrication (FS, zero lag). Countertop fabrication drives: countertop delivery and installation (FS, zero lag). Countertop installation drives: plumbing trim-out start (FS, zero lag).
LVP flooring predecessors: cabinet installation complete on the floor (FS), substrate inspection documented (FS). LVP flooring drives: accessories installation (FS), window treatment installation (FS, add lead time for window treatment delivery).
Accessories installation predecessors: paint complete all coats (FS), flooring complete (FS). Window treatment installation predecessors: paint complete all coats (FS), flooring complete (FS).
Shower door measurement prerequisites: tile complete and grouted (FS). Shower door measurement drives: shower door fabrication (FS). Shower door fabrication drives: shower door installation (FS).
Critical path analysis
The critical path through interior finishes on a standard multifamily floor runs: prime coat paint complete, cabinet installation, countertop template (same day), countertop fabrication (10-14 days), countertop delivery and installation, plumbing trim-out, floor completion milestone.
The countertop fabrication period is the longest non-compressible duration in the interior finishes critical path. Any delay to cabinet installation directly extends the floor completion date by the same number of days, because the countertop template cannot happen until cabinets are complete and fabrication cannot start until template is taken.
The critical path does not run through flooring, accessories, or window treatments on a standard production floor, because those activities can run in parallel with the countertop fabrication period and complete before countertops are delivered. If flooring or accessories are delayed beyond the countertop fabrication period, however, they join the critical path and extend the floor completion date.
Float and compression opportunities
Non-critical activities have float that can absorb minor delays without affecting the floor completion date. The amount of float on window treatments, for example, is the difference between the window treatment delivery lead time and the countertop fabrication period. If window treatments have a two-week lead time and countertop fabrication has a twelve-day lead time, window treatments have two days of float on a specific floor.
Schedule compression on the interior finishes critical path requires either reducing the countertop fabrication lead time, which requires a fabrication shop with shorter lead times or pre-templating before cabinet installation, or starting cabinet installation earlier by accelerating the predecessor activities of drywall and prime coat.
How Innergy provides scheduling input
At pre-construction, Innergy provides the GC’s scheduler with our specific duration assumptions for the project’s unit type and floor count, the predecessor conditions we require before each scope item mobilizes, our countertop template-to-delivery lead time for the specified product, and our window treatment lead time for the specified product. This input allows the scheduler to build an accurate interior finishes model in the master schedule before the project starts. For finishes scheduling input in TX, WA, OR, CO, UT, NM, or AZ , contact us and we respond within one business day.
Innergy covers Division 6-Finish Carpentry & Cabinets, Division 9-Flooring, and Division 12-Countertops for multifamily construction under a single subcontract.
These duration figures should be treated as starting points that the finishes sub confirms or adjusts based on the specific project’s unit types, floor count, and crew deployment plan. A floor with six distinct unit types takes longer than a floor with two unit types at the same total unit count, because crew movement and material staging for six configurations is less efficient than for two. Request project-specific duration confirmations from the finishes sub at pre-construction rather than applying generic industry averages without adjustment.