Spray Foam Insulation in Omaha, NE

Spray foam insulation starts as two liquids that meet at the gun, expand on contact and set into a solid layer bonded to the framing. Because it grows into every crack and seam it touches, it insulates and air seals at the same time. That double duty matters in Omaha, where the Eppley Airfield record runs from -32F to 114F and a house spends months heating and months cooling. Batts and loose fill slow heat, but air slides right past them; foam closes the path.

Closed cell vs open cell

The two foams behave very differently, and most homes we quote use both.

Closed-cell foam is dense and hard once it cures. HomeGuide lists it at R-5 to R-7 per inch. At normal thickness it slows water vapor, stiffens what it is sprayed on and shrugs off occasional wetting. It is our default for rim joists, poured basement walls, crawl space walls, steel buildings and any surface that can sweat.

Open-cell foam is light and spongy, listed by HomeGuide at R-3.5 to R-3.7 per inch. It swells far more as it is sprayed, filling irregular rafter bays and wall cavities completely, and it costs less per square foot. It is common on the underside of roof decks and in interior walls where sound control matters. Because it lets vapor through, it is kept away from spots that can get wet.

Which foam has the highest R-value?

Per inch, closed cell wins comfortably, which is why it goes where space is tight: a 2x6 rim joist pocket or a basement wall that will be framed out. Open cell needs more thickness to match, but it is cheaper per inch and works where depth is not a problem.

Where it pays in this market

Nebraska's statewide code, the 2018 IECC in force since July 1, 2020, asks new homes in Climate Zone 5 for R-49 ceilings, R-20 walls (or R-13 plus R-5 continuous) and R-15 continuous or R-19 cavity on basement walls, and it caps air leakage at 3 air changes per hour on a blower door test. Iowa homes across the river in Council Bluffs fall under the 2012 IECC, which sets a 4 ACH limit in Zone 5. Older houses were never built to those numbers. Foam is the quickest way to bring the leakiest parts of an existing house, the rim joist, the bonus room and the cathedral ceiling, close to modern performance.

When foam is not the answer

For a wide-open attic floor, sealing the top plates and penetrations and then blowing loose fill to depth usually gives the same comfort for less money. We will tell you when that is the case. Foam also should not go over active roof leaks, wet framing or old knob-and-tube wiring; those get fixed or flagged first.

Get a free estimate or call (531) 217-5896 and we will come measure.