Insulate and Air Seal in One Easy Step

As the mercury drops in the winter and begins to rise and boil in the summer, it’s important to keep your home or building comfortable every season of the year. Installing both an insulator and an air barrier is the most effective way to maximize your structure’s energy efficiency. Spray foam insulation may be the ideal solution.

How Spray Foam Works

Spray foam is a dual-acting foam that insulates and air seals in one product. It’s sprayed on as a liquid and quickly expands to fill a space, creating an air barrier and insulator that keeps energy in and moisture, allergens and pollutants out.

Air leaks are inevitable and not always found in easy to reach spots. Because spray foam sticks to everything it’s applied to, it’s an ideal choice for attics, basements, and all those small or hard to reach spots around doors, windows, outlets, light fixtures, and more.

Spray-foamed stud wall and ceiling with several window spaces covered by white Tyvek from the exterior.

Types of Spray Foam

There are two types of spray foam to choose from. Both insulate and air seal in one step but also have some differences.

Open-cell Spray Foam

  • Softer and more flexible

  • Dampens sounds, is vapor permeable, and eliminates air infiltration

  • Expands to 100-120 times its size when applied

  • Has a lower R-value (insulating power) than closed-cell spray foam

  • Less dense than closed cell spray foam because the cells (bubbles) remain open during application

Closed-cell Spray Foam

  • Higher R-value

  • Expands up to 33 times its size when applied

  • Creates strong air, thermal, and vapor barriers

  • More dense than open-cell spray foam because the cells (bubbles) close when applied

  • More rigid and heavier than open-cell foam, providing structural reinforcement to your home or building during storms

Benefits of Spray Foam

Energy Savings

Spray foam keeps conditioned/heated air in, giving your HVAC unit a break by letting it run less often. You’ll enjoy lower heating and cooling costs as a result.

Improved Indoor Air Quality

Spray foam seals penetration points, preventing pollen and other allergens from leaking into your home or building.

High Insulating Power

Both types of spray foam pack a punch with their high R-values per inch for excellent thermal resistance.

Sound Control

Spray foam seals the penetrations that noise travels through, absorbing sounds and creating a more peaceful environment.

Durability

Spray foam does not shrink, sag, or settle and sticks to many different materials for the lifetime of your building.

Moisture Control

Closed-cell spray foam does not absorb moisture and helps prevent mold and water damage.

Spray Foam Insulation Project Gallery

Installer in protective gear spraying closed‑cell foam into a single bay of a post‑frame wall.
Close-up of stud wall packed with spray foam around blue conduit and yellow electrical cables, forming an airtight seal.
Worker finishing a long horizontal strip of spray foam on a post‑frame wall with white wrap backing.
Closed-cell spray foam covers an interior ceiling between red sprinkler lines, lit by a single construction light
Vaulted room with spray-foam base in walls and pink batts in ceiling and gable, windows framed in black.
Expansive vaulted living space with spray foam on walls and ceiling, pink batts in some roof bays, stair opening in floor.
Long interior garage wall insulated with spray foam under open truss ceiling, tools and lumber on slab floor.
White spray-foam covering entire flat ceiling plane between parallel truss chords.
Spray-foam packed wall around a single window opening, with exposed header cavities above.
Partially filled spray-foam wall under vaulted ceiling with visible studs and rough-in wiring.
Large framed room with spray-foam on walls and sloped ceiling trusses, light streaming through plastic-covered window.”
Roof framing with spray foam sealing the left side truss heel while right side remains bare OSB sheathing.
Slanted ceiling fully coated in cream spray foam
Spray-foamed stud wall and ceiling with several window spaces covered by white Tyvek from the exterior.
Vertical view of a high wall section packed with spray foam between studs and a narrow window at top.
Large workshop with car lift, walls and vaulted roof uniformly insulated with spray foam.
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Count on Cullen for Expert Spray Foam Installation

When local homeowners, builders, and contractors need quality insulation solutions, they turn to Cullen Insulation. We’ve been an active part of our community for over three decades and have made a name for ourselves as a company that is committed to excellence in all we do. Our expert team understands our area’s climate and the unique insulating needs of our community thanks to years of hands-on experience and quality training. We have the knowledge and experience required to recommend and install the right products for your residential or commercial project. Our installation team trusts in the durable and dependable products from BASF Spray Polyurethane Foam and Johns Manville for our spray foam projects.  Contact us today to learn more about spray foam insulation for your insulation project and receive your free estimate.