Hardwood Flooring in Dixon

Dixon Conditions That Affect Solid Hardwood

Dixon sits at about 62 feet in Solano County. The regional Sacramento Valley record shows summer air cycling widely within each day rather than staying uniformly dry. In the National Weather Service publication "Climate of Sacramento, California" (revised August 2010), average relative humidity at Sacramento is 78 percent at 4 AM against 30 percent at 4 PM in July, a swing of roughly 48 points inside the same day. Those are Sacramento readings taken about 20 miles from Dixon, not local measurements.

Measured Humidity and Solid Wood Movement in Dixon

University Airport, Davis, 6 miles from Dixon and at about the same elevation, supplied the 62,832 hourly dewpoint readings, 2015 to 2025, behind these figures. Warm that winter air to 70°F without adding moisture and it settles at a median 37.4% relative humidity, with 24% of heating-season hours below the 30% floor NWFA sets for wood floors; the same air reaches 56% in summer. Solid hardwood follows those numbers: its equilibrium moisture content runs from about 7.3% in the heating season to 10.3% in summer, and on the Forest Products Laboratory's coefficients for American white oak that swing changes the width of a 5-inch plainsawn board by about 0.056 inch (about 1/18 inch) — against 0.029 inch for the same board quartersawn. That is inside the range solid wood is specified for, but without much margin, so in Dixon board width and cut get decided before species does.

Source: Hourly ASOS dewpoint observations 2015–2025, Iowa Environmental Mesonet (Iowa State University); equilibrium moisture content from USDA Wood Handbook FPL-GTR-190 Eq. 4-5; movement from FPL-GTR-282 Eq. 13-3 and Table 13-5

Subfloor and Foundation Work

Dixon sits on the most uniform and least seasonally active ground of any city in this service area, and that is measurable rather than impressionistic. USDA-NRCS SSURGO maps just six soil units inside the city limits — the fewest anywhere in this set — and a single one, Yolo silty clay loam, accounts for 69.0% of the incorporated area. Not one unit in Dixon reaches the threshold NRCS uses for high shrink-swell. The most expansive soil in the city, Capay silty clay loam at 11.3% of the area, has a linear extensibility of 5.8%, which is upper-moderate; the dominant Yolo unit is 3.7%. For a floor this cuts two ways. Seasonal subgrade movement is a smaller factor here than in the Coast Range foothill towns, so slab curl and seasonal cupping traceable to swelling clay are less likely to be the explanation for a problem floor. But it also removes an excuse: where a Dixon floor does move, the ground is unlikely to be why, and the subfloor, the moisture content at installation, or the interior humidity cycle should be looked at first.

On a slab, solid hardwood is the least forgiving floor there is: it cannot be nailed into concrete, and it responds to vapor drive from below more sharply than anything else we install. Where we're going over slab we test the concrete for moisture first — an in-situ relative humidity test per ASTM F2170 rather than a guess — and where the readings rule out solid wood, we say so and price engineered instead of hoping for the best.

Over a crawlspace, solid hardwood is in its element — plank or plywood subfloors take fasteners well — but only when the crawlspace itself is dry. We check the ground cover, look for standing water and rot at the joist ends, and read the moisture content of the subfloor from below. Cupping in a solid floor is almost always a crawlspace problem that surfaced upstairs.

Source: NAHB analysis of the Census Bureau Survey of Construction, foundation type by region (2024)

Dixon Homes We Work In

ACS 2020-2024 five-year estimates count 7,121 housing units, spread unusually evenly across four decades: 18.6% built 1970-1979, 17.5% built 1990-1999, 16.1% built 1980-1989, and 15.3% built 2000-2009. Pre-1940 units account for just 0.7% of the stock. Construction continues, with 6.0% of units built 2020 or later. Dixon's 1970s, 1980s, 1990s, and 2000s stock is directly relevant here, because homes of that period frequently have a board or plywood subfloor that will hold a nail-down installation, and sometimes original wood still under the carpet. We check for both before quoting a full replacement — refinishing what's already there is often the better answer.