Spray Foam Insulation in Oklahoma City, OK

Spray foam insulation is a two-part liquid that expands as it is sprayed, sticks to the surface and cures into a solid layer. Because it fills every gap it touches, it insulates and air seals in one step, which batts and loose fill cannot do on their own. In Oklahoma City homes that matters most in places where air leaks are hard to reach with caulk and sealant: the underside of a roof deck, the joint where walls meet the top plate, the floor of a room over a garage, and the long seams of a metal building.

Open-cell foam

Open-cell foam is light and spongy, expanding many times its liquid volume. HomeGuide lists it at about R-3.5 to R-3.7 per inch and $1.50 to $3.50 per square foot installed. It stops air well and deadens sound, but some water vapor still passes through it. In central Oklahoma it is often used on the underside of the roof deck in new houses, which turns the attic into a sealed, semi-conditioned space so the air handler and ducts are no longer baking in a vented attic, and in interior walls and floors where sound matters.

Closed-cell foam

Closed-cell foam is dense and rigid, at roughly R-5 to R-7 per inch and $3.00 to $5.00 per square foot in HomeGuide's 2026 figures. At typical thickness it acts as a vapor retarder, does not hold water and stiffens the surface it is bonded to. We use it on steel buildings and barndominiums, on garage ceilings under bedrooms, on band areas between floors, and anywhere space is tight and each inch has to count.

Who it suits

Spray foam is a good fit when you are building or adding on and the framing is open, when you have a metal building that sweats or bakes, when your HVAC equipment lives in the attic and you want it inside the thermal envelope, or when a room over a garage or a bonus room with kneewalls never feels right. It is a weaker fit on a wide, open attic floor in an existing house, where air sealing plus blown-in fill usually costs less per unit of R-value. We will tell you which side of that line your house falls on.

Signs it is worth a look

Upstairs rooms that run several degrees warmer than the ground floor in summer. An AC that runs nearly nonstop on 100-degree days. A bonus room over the garage that is hot in July and cold in January. Dust streaks on carpet along baseboards, which often mark air leaks. A metal roof or wall that drips on cool mornings. Any of those is a reason to have someone look at where the air and heat are getting in.

Sealing an attic changes the house

When foam goes on the roof deck, the attic is no longer vented to the outdoors. That can make ducts and equipment much more efficient, but it also means attic vents get closed off, any gas appliance up there needs a proper air supply and venting, and the space should get a small amount of conditioning or air exchange. We explain those details before you choose, not after. Get a free estimate