Case Study 29-2: The Chen-Williams Whole-House Flooring Project

Background

When Priya and Marcus Williams began their gut renovation of the 1963 ranch, flooring was one of the first decisions they locked in — not because they were certain what they wanted, but because the flooring choice affected everything else: door heights, transition planning, subfloor preparation scope, and the HVAC rough-in for the radiant heat system they were adding.

The scope was substantial: approximately 1,400 square feet on the main floor (open-plan living/dining, kitchen, three bedrooms, two bathrooms) and 800 square feet in the newly finished basement (family room, office, storage/mechanical excluded). Three bathrooms had tile already planned. The bedrooms were open to hardwood or LVP. The main living areas needed something durable enough for two large dogs and one future toddler.

The Options They Seriously Considered

Priya and Marcus spent two weekends visiting showrooms, reading reviews, and getting quotes. They built a decision matrix that they found useful enough to share:

Option A — Solid Red Oak Throughout (Main Floor Only; Tile in Bathrooms): Their initial instinct, driven by aesthetics and long-term value. They loved the look of the 4-inch wide plank oak in the showroom. Quote for 1,100 sq ft (main floor minus bathrooms): materials at $5.80/sq ft plus professional installation at $4.20/sq ft = $10/sq ft installed, or $11,000 total. Basement would still need a separate solution (below grade, solid wood not appropriate).

Concerns: The dogs had already destroyed a rental property's hardwood floors in a previous apartment. Water from the kitchen, bathroom doorways, and outside-tracked moisture would be ongoing risks. And the radiant heat system was incompatible with solid hardwood (thermal cycling causes excessive movement). The radiant heat contractor explicitly said he would not warrant his system under solid hardwood.

Option B — Engineered Hardwood (Main Floor) + LVP (Basement): Same visual aesthetic as Option A for the main floor, with an engineered product rated for radiant heat. Researched several products; landed on a 6mm-wear-layer European white oak, engineered, in a 7-inch wide plank format. Quote: $7.40/sq ft materials + $3.80/sq ft installation = $11.20/sq ft installed for 1,100 sq ft ($12,320). LVP for basement at $5.50/sq ft installed, 800 sq ft = $4,400. Total: $16,720.

Concerns: The 6mm wear layer allowed for multiple refinishing cycles — adequate for their expected tenure in the house. But the European white oak they liked cost more than anticipated, and the total was higher than Option C.

Option C — SPC Luxury Vinyl Plank Throughout (Main Floor + Basement): The option they'd initially dismissed as "not really wood." After spending time in showrooms, handling samples, and reading professional flooring forums, they revised this instinct. A 20-mil wear layer SPC product from a mid-tier brand (COREtec Plus, Shaw Floorte) at the $4.50/sq ft materials tier looked genuinely convincing — the embossed-in-register texture was high quality, the color was sophisticated, and the plank width (7 inches) matched the engineered product they liked visually.

Quote for 2,200 sq ft total: $4.50/sq ft materials + $3.80/sq ft installation = $8.30/sq ft, total $18,260. Wait — that was actually more expensive than Option B total. Back to pencil.

A second installer quoted $2.80/sq ft for the LVP installation (the floating floor is genuinely faster to install than nail-down hardwood). New total: $4.50 + $2.80 = $7.30/sq ft, $16,060 total. Comparable to Option B.

A third quote, directly from a flooring contractor who bought at commercial volume: $3.85/sq ft materials (same product, contractor pricing) + $2.80/sq ft installation = $6.65/sq ft, total $14,630.

Advantage: One consistent product and appearance throughout the house including the basement. Fully waterproof everywhere. Pet and child friendly. Radiant heat compatible (confirmed with manufacturer spec sheet — the specific COREtec product they chose was rated for radiant with surface temp under 85°F, and their hydronic radiant system was engineered to stay below that).

The Decision Process

What made the decision was not just cost. Three additional factors:

The dog reality test. Priya and Marcus had both experienced hardwood with large dogs. The smaller dog had torn up a corner of engineered hardwood in a rental by repeatedly scratching when asking to go out. With a 20-mil wear layer LVP, they did their own test: they used their keys and a spare sample tile to scratch vigorously. The 20-mil product survived. A 12-mil competitor did not — the scratch reached the print layer. The dogs' nails would exert less force than keys. This became a real selection criterion, not a hypothetical one.

The single installer advantage. One product, one installer, one installation sequence = one less contractor to coordinate, one less potential mismatch at a transition, and one warranty covering the whole house.

The basement logic was decisive. No reasonable hardwood option worked for the basement. Any plan that used hardwood on the main floor required a different product in the basement, which meant two products, two installers or two mobilizations, and a guaranteed height mismatch at the stairway transition. LVP throughout eliminated this.

They chose Option C. COREtec Plus Enhanced HD, Highlands Pine appearance (a light, cool-toned wide plank), 7mm SPC core with 20-mil wear layer and attached underlayment.

Subfloor Preparation

The gut renovation included new framing for several walls, which meant some sections of subfloor were existing 3/4-inch OSB (original construction) and some were newly installed 3/4-inch plywood (where walls had been moved). The seam between old and new subfloor required attention.

Their flooring contractor walked the full subfloor before quoting installation and provided a written punch list: - 3 areas requiring self-leveling compound (old OSB at bathroom doorway transitions had slight edge swell from historical moisture) - 1 area of OSB panel with delamination at a corner (required replacement of one 4x8 sheet) - 47 additional screws needed in the existing subfloor (loose fasteners at various points) - All panel seams to be filled with floor-leveling compound to prevent telegraphing through LVP

Subfloor prep cost: $640 (contractor's time plus materials). Priya had budgeted $400 and was initially surprised. The contractor showed her the delaminated OSB corner and the edge-swelled seams. She agreed the prep was necessary. The alternative — telegraphing through the finished floor — would have been visible and irreversible.

The Tile Bathrooms

The three bathrooms received 12x24-inch large-format porcelain tile in a warm grey, coordinated with the LVP appearance. The tile contractor specified DITRA uncoupling membrane over the existing subfloor in all three bathrooms — the 1963 construction had original subfloor at L/240 stiffness (adequate for the era, inadequate for modern large-format tile without intervention). DITRA provided the necessary decoupling without adding the height of cement board, which mattered at doorway transitions.

The bathroom tile sat 5/8 inch above the subfloor (DITRA + thinset + 3/8-inch tile = approximately 5/8 inch total). The LVP in the hallway outside each bathroom sat 7mm (approximately 9/32 inch) above the subfloor with its attached underlayment. Height difference at each bathroom doorway: approximately 3/8 inch — ideal for a reducer transition strip. Priya sourced chrome aluminum reducers for $18 each.

The Radiant Heat Integration

The flooring contractor worked with the radiant heat contractor to sequence the installation. The radiant tubing was embedded in a 1.5-inch gypcrete topping slab that replaced the original concrete in the main floor areas with radiant. This gypcrete slab was the subfloor surface — flat, smooth, and at higher moisture content than the LVP manufacturer's preference when first poured.

They waited 28 days after the gypcrete pour, then ran the radiant system at low temperature (under 70°F surface temp) for two weeks before flooring installation. The flooring contractor tested moisture at 12 random points: average 4.1%, maximum 5.8%. Both below the COREtec specification limit of 8%. Installation proceeded.

The flooring contractor installed the LVP beginning at the primary entry (the front door, establishing the main traffic axis) and worked room by room. Staggering the end joints was meticulously done — the contractor's practice was minimum 8-inch offset between end joints in adjacent rows, and visually distributed the plank lengths across the floor. The result had no obvious pattern repetition.

The Transition Detail That Got Them

One transition caused grief: the basement stair landing. The LVP flooring extended to the top of the stair. The stair nose — a bullnose transition piece that covers the exposed LVP edge at the step — was the COREtec matching stair nose, which Priya had ordered. What she hadn't accounted for was that the stair nose added 1/4 inch of height at the top of the stair, which meant the first riser was 1/4 inch shorter than all subsequent risers.

Building code allows no more than 3/8-inch variation between stair risers; the 1/4-inch variation was within code but just noticeable to the foot. The flooring installer noted it as something to be aware of, not something requiring correction at that stage. For a future stair renovation, Priya noted, the riser height should be calculated from the finished floor surface before the stair nose is specified.

Outcomes

Two years after installation, Priya and Marcus's assessment:

What worked perfectly: The visual quality of the LVP, the performance against pet and child abuse (they had a toddler by year two), the consistency of appearance throughout the house, and the waterproof performance at the kitchen and bathroom connections.

What they'd do differently: Priya wished she'd upgraded to the next product tier for the main living area — a product with an embossed-in-register texture that would have felt slightly more realistic underfoot. The product they chose was excellent; the next tier up would have been slightly better, at approximately $1.20/sq ft more — roughly $1,700 additional for the main floor. She described it as the one value-over-quality trade she'd make differently.

The dogs: Unambiguously satisfied. Two large dogs, several puddles, tracked-in mud multiple times, and the floor looked the same as installation day after cleaning.

Total project flooring cost: $14,630 for 2,200 sq ft installed, plus $640 subfloor preparation, plus $1,200 for tile work in bathrooms (tile + DITRA + installation, already quoted separately) = approximately $16,470. Total per square foot all-in: $7.49 for finished floors throughout the house.