Engineered Hardwood in Dixon

Dixon Conditions That Affect Engineered 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.

What Dixon's Humidity Asks of Engineered Hardwood

In Dixon the case for engineered hardwood rests more on plank width and slab than on climate, and the measurements show why. Hourly dewpoint readings from University Airport, Davis, 6 miles away, put that air at a median 37.4% relative humidity once it is heated to 70°F over winter — 24% of those hours under NWFA's 30% minimum — rising to 56% in summer. A solid 5-inch white oak board living through that, at roughly 7.3% to 10.3% equilibrium moisture content, changes width by about 0.056 inch between seasons. A cross-laminated core exists to restrain that movement; how much it restrains depends on the product's construction, so we go by the manufacturer's stated humidity range for the specific floor rather than a general rule.

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.

A slab is the single biggest reason engineered hardwood gets specified at all. A dimensionally stable core can go over concrete where solid wood cannot — floated, or glued down with a moisture-control membrane. That is not a free pass: we still test the slab per ASTM F2170, still grind or fill it flat to the manufacturer's tolerance, and still match the adhesive system to the reading we get. Skipping the test is how a glue-down floor comes loose.

Over a crawlspace, engineered goes down by nail, staple, glue, or float, so the method follows the subfloor rather than the other way round. We flatten the subfloor first — engineered plank is stiff, and it bridges dips instead of following them, which is what produces hollow spots underfoot.

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. In Dixon's 1970s, 1980s, 1990s, and 2000s housing, engineered often wins on height as much as on moisture: a thinner assembly clears existing door jambs, appliance toe-kicks, and the transitions to rooms that aren't being redone, which matters when only part of the house is getting new floor.