Spray Foam Insulation in McKinney, TX

McKinney is the Collin County seat, and its buildings span more than a century. Around the old courthouse square, the city’s 2023 historic resources survey counted more than 3,300 buildings and structures old enough to count as historic, in styles from Queen Anne and Folk Victorian to Craftsman and ranch. Then the city grew from about 21,000 people in 1990 to more than 195,000 in 2020, much of it in master-planned communities like Stonebridge Ranch and Craig Ranch. Past the edge of town there’s still acreage, some of it with barns and shops. Each of those needs a different plan.

Homes in McKinney

Many of the houses near the square date to the late 1800s and early 1900s. Houses that old were usually built up off the ground on pier and beam, and many around the square still are. If yours is, only the floorboards separate your rooms from the open crawl space, so the floor stays cold all winter and drafts come up around every pipe. Spraying closed cell foam from below, on the subfloor and rim joists, puts an air seal and insulation right where the cold comes in, and it holds up to the damp air under a house. Our crawl space insulation page has the details.

The newer side of town looks very different. About two-thirds of McKinney’s homes were built between 2000 and 2019. Stonebridge Ranch alone has more than 9,400 homes on over 5,000 acres, and Craig Ranch covers about 2,200 acres north of SH 121. Like most Texas houses of their era, they sit on slabs with the air handler and ductwork in the attic, and that attic can pass 130°F in July. Open cell foam on the underside of the roof deck, about 5.5 inches for roughly R-20, brings the attic and the ducts inside the conditioned space. For most newer McKinney homes that’s the place to start, and our attic spray foam page explains why.

Shops, barns and acreage around McKinney

Outside the city limits, including north of town, there are still homes on acreage with McKinney addresses, some with barns, workshops and horse stalls. Those outbuildings are where closed cell foam pays off.

An uninsulated metal shop sweats. When humid air reaches steel panels that cooled overnight, water condenses and drips onto tools, trucks and feed. Closed cell foam sprayed directly on the metal keeps that air off the steel, and at about 2 inches it adds roughly R-13 and stiffens thin wall panels. Three inches under the roof gets you about R-20. Our shop and garage page covers workshops, and metal building insulation goes deeper on condensation.

Post-frame barns get the same closed cell treatment on the inside of the metal skin, sprayed between and around the posts and girts, so the walls and roof end up with one continuous layer instead of batts stuffed between framing. Our pole barn insulation page has more on post-frame buildings.

Neighborhoods and ZIP codes we cover

We cover all of McKinney, including the historic neighborhoods around the downtown square (75069), Craig Ranch (75070), Tucker Hill and Trinity Falls (75071), and Stonebridge Ranch, which is mostly in 75072. We also work on acreage with McKinney addresses outside the city limits, including the area north of town.

McKinney spray foam questions

Our house near the square is more than 100 years old. What can you insulate?

Usually the attic and, if the house sits on pier and beam, the floor from below. Open cell foam under the roof deck handles the attic, and closed cell on the underside of the subfloor handles the crawl space. Plaster or drywall walls that are already finished are a separate question, since spray foam goes into open framing. We’ll look at the whole house during the free measure and tell you what makes sense for it.

We’re building a barndominium on land outside McKinney. When do you spray?

Once the steel shell is up, the door and window openings are framed, and any wiring or plumbing in the exterior walls is roughed in, but before interior walls and finishes. Closed cell goes on the walls and the underside of the roof, usually 2 to 3 inches, for roughly R-13 to R-20 and no condensation on the steel. Our barndominium insulation page has more detail.

Do you work on properties outside the McKinney city limits?

Yes. Some acreage north of town has a McKinney address without being inside the city, and it’s part of our area like the rest of Collin County. We’ll need a clear path to the building for the spray rig, which is a truck or trailer with hoses that run inside. If the shop or barn sits far from the driveway, let us know when you book the measure.