LVP has largely replaced carpet and hardwood as the primary residential flooring specification in multifamily construction over the past decade. The reasons are practical: LVP is more durable than carpet, less expensive than hardwood, waterproof, and faster to install at scale. For a 200-unit multifamily project, those factors matter in the budget, the schedule, and the long-term maintenance picture for the owner.
But LVP is also a product with specific installation requirements that many flooring subs skip, particularly on the production end of multifamily. Understanding those requirements, and knowing what questions to ask before work starts, is the difference between a floor that passes inspection and a floor that fails flatness testing three months into installation.
What the specification actually controls
LVP is not a single product. The term covers a range of constructions with different performance characteristics, and the specification on your project should be controlling which product hits the job site. The variables that matter in a commercial and multifamily specification are wear layer thickness, total thickness, locking system type, and whether the product is floating or glue-down.
| Specification element | What to look for |
|---|---|
| Wear layer thickness | 20 mil minimum for multifamily residential. 28 mil for high-traffic common areas and commercial applications. Thinner wear layers delaminate under point-load traffic. |
| Total plank thickness | 6mm to 8mm for floating residential installation. Thicker products have better acoustic ratings but require tighter substrate flatness tolerances. |
| Installation method | Floating click-lock is standard for residential units. Glue-down is specified for high-moisture or high-traffic applications. Confirm with the spec, mixed methods on the same project create inspection problems. |
| Acoustic rating | IIC and STC ratings specified on multifamily projects. LVP alone does not meet IIC requirements, an approved underlayment must be confirmed against the spec before installation begins. |
| Manufacturer warranty | Commercial warranty required for all common areas. Residential warranty is not appropriate in corridors and amenity spaces regardless of product thickness. |
Substrate requirements before the first plank goes down
The most common cause of LVP installation failures in multifamily construction is substrate condition. LVP tolerates very little variation in subfloor flatness, and concrete subfloors on construction projects rarely meet installation tolerances without preparation work.
The industry standard for LVP installation is 3/16 inch over a 10-foot radius, per most manufacturer installation guidelines. That is the flatness requirement you should be holding your flooring sub to, and the flatness inspection should be documented before any material is installed.
A flooring sub who does not perform and document a substrate flatness inspection before installation starts is a schedule risk. If the floor fails flatness testing at inspection, the material comes up, the substrate gets corrected, and the floor goes back down, after your schedule has absorbed the hit. Require the inspection and require documentation.
Substrate moisture is the second issue. On concrete slabs, a calcium chloride test or relative humidity probe should be completed per the manufacturer’s requirements before installation. The acceptable moisture content varies by manufacturer and product, confirm against the submittal before installation begins.
Coordination requirements before mobilization
LVP flooring is a late-stage finish item. On a multifamily project, flooring goes in after cabinets are set, after paint is complete, and after all wet work is finished and cured. Mobilizing a flooring crew before cabinets are set produces damaged material and rework.
Transitions and height differentials. LVP sits at a specific finished floor height, and the transition to tile at bathroom thresholds and unit entries needs to be planned before either trade starts.
Cabinet leg height and base trim. On some projects the cabinet bases sit on top of the LVP; on others the LVP runs under the toe kick. The sequence matters for the finished height and for the base trim installation.
Expansion gaps at all perimeters. Floating LVP requires expansion gaps at all vertical surfaces. Those gaps get covered by base trim or reducer profiles. If base trim is installed before the flooring, the gap cannot be maintained.
What to require from your LVP flooring subcontractor
Before installation starts, require the sub to submit the product data sheet for the specified material and confirm it matches the approved submittal. Require a written substrate inspection report with flatness measurements and moisture readings. Require confirmation that the installer has reviewed the manufacturer’s installation guide for this specific product.
During installation, require that the sub identifies any substrate conditions that fall outside manufacturer tolerances before installing over them. A flooring sub who installs over a known problem and says nothing until inspection is a change order problem.
How Innergy approaches LVP installation on multifamily projects
At Innergy Interiors, LVP installation falls under our Division 9 scope. Before any material goes down on a multifamily project, we perform and document a substrate flatness inspection and a moisture test. If substrate conditions fall outside the manufacturer’s installation tolerance, we notify the superintendent in writing before we install anything.
We sequence our flooring installation against your cabinet and paint schedule. We do not mobilize a flooring crew to a floor that is not ready. Our goal is to deliver a floor that passes inspection the first time, because a second walkthrough is a schedule problem for everyone.
If you are bidding a multifamily project in Texas, Washington, Oregon, Colorado, Utah, or New Mexico, we are happy to include Division 9 flooring in a full interior finishes package or as a standalone scope. Send us the project details and we will come back within one business day.
Every LVP installation Innergy performs on a multifamily project begins with a documented substrate inspection. We do not install over unknown conditions. We document what we find, notify the superintendent before any material goes down, and build the inspection record into the project close-out package.