Maple Grove Wood Flooring has been sanding, finishing and installing wood flooring in Medina for more than twenty years, and the first question we ask here is almost never how old the floor is. It is whether the floor already down can be sanded at all. That is a measurement rather than an opinion, and it decides the whole shape of the quote.
Most of the houses we walk into in this city are young, which means the floor is usually an engineered plank still wearing its factory finish. Whether that plank has enough wood left above its core to take an abrasive is the difference between a refinish and a replacement, and the two are nowhere near each other in price.
So a visit starts with a wear layer measured, a moisture reading taken on the slab a lower level actually sits on, and a written price per square foot with the minimum project size stated before a crew is scheduled. Everything below is why those three things, in that order.
What Sanding Means on a Floor This Young
The housing stock answers the question before we do. Of 2,412 housing units in the city, 1,193 — 49.5 percent — were built in 2000 or later, the peak decade is 2010-2019 at 763 units, and zero units are reported built in 1939 or earlier.
A city with no old core
That is an unusual shape for a suburb. The city holds 25.551 square miles of land and only those 2,412 homes, much of it in the rural designations of the 2040 Comprehensive Plan the City Council adopted on October 2, 2018, where the Rural Residential district sets a minimum of 40 contiguous acres for development.
Ownership runs the same direction. 92.2 percent of occupied units are owner-occupied, and of the 2,152 owner households, 1,921 live in one-unit detached houses. The floor we are asked about is nearly always inside a detached house whose owner intends to keep living on it, and that changes what is worth spending money on.
Wear layer, not the word engineered
Engineered and refinishable are not the same purchase, and the conversation at closing rarely makes that clear. An engineered plank can only be sanded as far as its wear layer allows, and a 2mm wear layer will not survive a full grit sequence with a drum sander and an edger working behind it.
We measure that layer before quoting sanding on it, at a register cut, a stair nosing or a doorway transition where the edge of the plank is visible. When the measurement comes back under the sanding threshold we say replacement, because quoting a refinish on that floor sells a job that cannot actually be delivered. A sand-through on an engineered plank is not repairable in place; that board has to come out.
When a recoat is the right answer
A floor that cannot take a full sand will often take a screen and recoat. An abrasive screen scuffs the existing finish just enough for a new coat to bond, removes no meaningful wood, and buys years on a plank whose wear layer rules out anything more aggressive.
It only works while the finish itself is intact. Once traffic lanes have worn through to bare wood, a buff and coat will telegraph the damage instead of hiding it, and the options narrow back to replacement. Sheen matters more here than people expect, because a recoat has to meet the finish already on the floor rather than start the sheen over. That is the argument for looking at a young floor early rather than at the point it already looks tired.
Looking for wood-flooring closer to Anoka? See Wood-Flooring Services in Anoka.
The Lower Level Is Below Grade Whatever the Plan Called It
Houses of this era usually have a finished lower level, and it is often the largest continuous floor area in the building. It is also the level most often quoted wrong, because the word on the listing and the word in the installation standard do not agree.
The 3 inch soil rule, walk-out basements included
NWFA Chapter 1, Part I, item 10 states it without hedging: if the soil surrounding a structure is 3 inches or more above the floor of any level, consider that level below grade. The same item adds that this includes walk-out basements.
So we set grade from the soil line rather than from what the builder wrote on the plan, and a lookout is quoted as below grade exactly the way a walkout is. On a large, recently finished lower level, getting that call backward is expensive rather than merely pedantic.
What belongs down there and what does not
Engineered and floating floors are appropriate above grade, on grade and below grade. Solid is not appropriate below grade, and no adhesive, acclimation schedule or vapor retarder changes that.
In practice that one rule settles the material conversation for a lower level in about a minute. Engineered plank, glue-down or floating, with the assembly picked from what the concrete reads rather than from whatever went down on the main floor. Glue-down asks more of the slab surface, because anything out of flatness telegraphs through a thin plank, while a floating assembly forgives more but wants its perimeter clearance respected at every wall, cabinet run and door jamb.
A reading taken on the slab itself
Before we quote a lower level, someone puts a meter on that slab. We do not infer it from the floor above, because a subfloor moisture content measured on wood joists in conditioned air describes a different material under a different exposure. Concrete in a house finished within the last few years can also still be giving up water from the pour itself.
Slab relative humidity is the number that picks the assembly: glue-down, or a floating floor over an underlayment, and whether a vapor retarder belongs in the stack at all. Adhesion failure and delamination trace back to a reading nobody took, and both surface long after the invoice.
Wide Plank and a Heating Season the Statute Names
Recent houses here are large and open, and the plank specified for them is usually wide. Wide plank is the most seasonally honest floor there is: each board is a wider piece of wood, so each board moves further across its face, and it does so on a schedule anyone can read in advance.
The season has a start date and an end date
Minn. Stat. 504B.161 subd. 1(a)(5) makes it a non-waivable covenant of every residential lease that the premises be held at a minimum of 68 degrees Fahrenheit from October 1 through April 30. With only 183 renter households in the whole city, that statute is useful here as a description of the heated season rather than as a market fact.
We name that seven-month stretch before the work is booked instead of after the gaps show up. Interior relative humidity falls through it, equilibrium moisture content follows it down, and a floor laid at one end of that swing behaves differently from the same floor laid at the other.
Gapping, cupping and what is actually a defect
Seasonal gapping across a wide plank floor in February is wood doing what wood does. Dry cupping, crowning after a bad sanding, and compression set in a floor installed wet and then squeezed are not, and telling them apart is a question of when they appeared and how far across the room they run.
We would rather have that conversation in the quote than in a callback in March. A floor that opened on schedule and will close again in July is a different problem from one that buckled, and the two do not share a fix.
Acclimation and the expansion gap
Acclimation is to the conditions this house will actually hold, in the season the floor will live through, not to a number printed on a carton. We record subfloor moisture content and room relative humidity before delivery, and set the perimeter expansion gap for the movement a wide board genuinely has.
In an open plan that runs unbroken through several rooms, those gaps and any transitions are a layout decision made early. Across a run that long, an expansion gap sized for narrow strip is how buckling starts at a doorway nobody was thinking about.
New Construction Changes What Sits Under the Floor
The newest assemblies in this city are also the most common ones, and they were built to current rules rather than to whatever was normal decades ago. That is mostly good news, and it changes both what we read and how the estimate is written.
What is under a slab built to the radon rules
Minnesota Rules 1303.2400 applies radon control requirements to new residential structures — one- and two-family dwellings, townhouses, apartment buildings and condominiums among them — where the structure has basement slabs, crawl spaces, slab-on-grade construction, an attached garage or another configuration allowing radon entry.
Under 1303.2402, the prepared subgrade below every floor system takes a gas-permeable material first. A soil-gas membrane then goes over that material before a floor is placed on or above the soil, and where two sections of membrane meet they are lapped at least 12 inches. That sealed assembly is one reason a young slab can read wetter than its age suggests.
Permits, and the line the exemption draws
The city’s building department is direct about it: permits are required to ensure construction and repair work are completed correctly and comply with the Minnesota State Building Code, and permits are required whether a contractor or the homeowner performs the work.
Minnesota Rules 1300.0120, subpart 4, item A exempts painting, papering, tiling, carpeting, cabinets, countertops and similar finish work from a building permit, while the same subpart states that an exemption does not authorize work in violation of the code. Structural subfloor work therefore gets its own line on our estimate, apart from finish work, because the exemption falls between the two. Sanding and finishing an existing floor usually sits on the finish side of that line, but once a joist, a subfloor panel or a stair stringer is in play the answer stops being obvious.
What is written down before the crew arrives
The quote carries a price per square foot and the minimum project size, rather than a free estimate with no number attached. Finish chemistry and coat count are on it, and the cure schedule lists the dates furniture, rugs and pets come back, written as dates.
Waterborne polyurethane and oil-modified polyurethane cure on different clocks and read differently at the same sheen, so which one is going down is settled on paper before anyone starts sanding. Containment is described by the equipment on the truck and where it exhausts, rather than by the word dustless.
- 20+ Years Experience
- Written Price Per Square Foot
- Moisture Tested Before Quoting
