Judge vinyl plank by its wear layer, not its overall thickness: buy at least 20 mil for a Kirkland family home, 12 mil for low-traffic bedrooms, and 28 mil or more for big dogs, mudrooms and rentals. Total plank thickness of 5 to 6.5 mm is plenty; more than that buys comfort, not durability. A 5 mm SPC plank with a 20 mil wear layer will outlast an 8 mm plank with a 12 mil wear layer every time. Wills Flooring installs any thickness for $2.50 per sq ft in labor, 500 sq ft minimum.
Vinyl plank specs are written to confuse. The box shows a big number in millimeters, the wear layer is buried in mils, and the two units are not even related. A common Reddit thread asks whether an 8 mm plank is "better" than a 5 mm plank, and the answer is usually no. We hear the same confusion from Kirkland buyers in Juanita, Rose Hill and Totem Lake who have been told thicker is always better. Here is what each number actually controls and where the money belongs.
Mils and millimeters are not the same thing
1 mil = 1/1000 in
Wear layer: measured in mils
The wear layer is the clear, tough film on top of the printed design. It is what your chair legs, dog claws and grit actually touch. Twenty mils is half a millimeter. It sounds thin because it is; that is why the difference between 6 mil and 20 mil is the difference between a floor that looks worn in three years and one that looks new in ten.
Usually 4 to 8 mm
Total thickness: measured in millimeters
This is the whole sandwich: wear layer, print film, rigid core and any attached pad. It controls how solid the plank feels, how well it bridges small subfloor dips and how it handles sound. It does almost nothing for scratch or wear resistance. A thick plank with a thin wear layer is a soft floor with a short life.
The coating on top of the wear layer
Better planks add a urethane or ceramic-bead finish over the wear layer. This is what resists micro-scratches and scuffing from grit tracked in off Lake Washington beaches and Bridle Trails horse paddocks. Two planks with the same 20 mil rating can perform quite differently depending on this coating, so ask about it.
Attached pad is not thickness that counts
A 1.5 mm foam or cork pad glued to the back inflates the total thickness number. It helps sound and comfort, which matters in Kirkland's Houghton and Juanita condos with neighbors below. It adds nothing to durability, so subtract it before you compare two planks by thickness.
Which wear layer goes where
| Wear layer | Grade | Where it belongs | Expected look-new life |
|---|---|---|---|
| 6–8 mil | Builder / big-box entry | Closets, guest rooms nobody uses. We do not recommend it anywhere else. | 3–5 years in traffic |
| 12 mil | Residential light | Bedrooms, home offices, adult households without pets | 7–10 years |
| 20 mil | Residential heavy / light commercial | Kitchens, family rooms, halls, entries, homes with kids and a medium dog | 12–20 years |
| 28–30 mil | Commercial | Big dogs, mudrooms, rentals, home gyms, short-term rentals | 20+ years; often carries a commercial warranty |
| 40 mil+ | Heavy commercial | Retail and offices; overkill for most homes but fine if the price is close | Effectively the life of the floor |
Warranty length tracks wear layer closely. A plank with a lifetime residential warranty at 12 mil is a marketing claim; read the exclusions for pets and furniture.
Price your Kirkland vinyl plank install right now
Vinyl Plank Installation Calculator
Installation pricing from our published rate card. Material is quoted separately based on the plank you choose.
Total thickness: when it matters and when it does not
Go thicker (6.5–8 mm)
Worth paying for when
- The subfloor has minor waves you would rather not fully level
- You want a softer, warmer, quieter floor in bedrooms
- The plank is a WPC and you want the foam core's comfort
- You are floating over an old vinyl or tile surface with texture
Stay standard (4.5–6 mm)
Save the money when
- The subfloor is flat plywood or a leveled slab
- You are choosing SPC, which is stiff at any thickness
- Door clearances and appliance heights are tight
- You would rather put the difference into a 20 or 28 mil wear layer
Room by room in a Kirkland home
- Finn Hill family home · 1,150 sq ft main floorTwo kids, one 70 lb dog, open kitchen and living. 20 mil SPC at 5.5 mm with attached pad. One continuous run, no transitions.1,150 × $2.50 = $2,875 labor
- Totem Lake rental · 640 sq ft + 13 stairsTenants change every two years and nobody babies a rental. 28 mil commercial-grade plank, 5 mm, matte finish that hides scuffs.640 × $2.50 + 13 × $100 = $2,900 labor
- Houghton condo · 500 sq ft bedroomsAdults only, HOA sound rule. 12 mil WPC at 7 mm with a cork pad, chosen for quiet rather than toughness.500 × $2.50 = $1,250 labor, right at the minimum
A Kirkland resale note: Eastside buyers and their inspectors have learned to spot thin builder-grade vinyl by the scuffed traffic lanes. A 20 mil plank in a clean matte finish photographs and shows like a far more expensive floor, and it costs a modest premium over 12 mil on the material line. If you plan to sell within five years, this is the upgrade that pays back.
How to read a vinyl plank spec sheet in 60 seconds
- Find the wear layer first. It should be stated in mils. If the box only shows a total millimeter thickness, assume the wear layer is thin and ask.
- Check the coating. Look for ceramic bead, enhanced urethane or a named scratch-resistant finish. This is the difference between two 20 mil planks.
- Identify the core. SPC is denser and dent-proof; WPC is softer and quieter. Neither changes the wear layer decision.
- Read the warranty exclusions. Pet claws, rolling chairs and moisture from below are the usual carve-outs. A commercial warranty on a 28 mil plank is a good sign.
- See it in your light. We bring 12, 20 and 28 mil samples to your Kirkland home so you can compare the finish under your windows. Details on our vinyl plank installation page.
Vinyl plank thickness questions from Kirkland buyers
From Juanita to Bridle Trails, and from the spec-sheet arguments on Reddit.
Is 12 mil wear layer good enough for a house?
Is 20 mil or 22 mil wear layer necessary for dogs?
Does thicker vinyl plank feel better?
What is the difference between 5 mm and 8 mm vinyl plank?
Does the wear layer thickness change the installation price?
Should I buy the thickest vinyl plank I can afford?
Compare 12, 20 and 28 mil in your own house
We bring the samples to your Kirkland home, check the subfloor and hand you a firm written quote with plank and labor on separate lines.
Wills Flooring serves Kirkland, Everett, Seattle, Sammamish, Lynnwood, Edmonds, Snohomish and the rest of Snohomish and King County from our Lynnwood showroom. See our vinyl plank flooring service, published price list, SPC vs WPC cores, does vinyl plank scratch and cheap vs premium vinyl plank.
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