Stop Losing Conditioned Air

Every building has small gaps and penetration points around the envelope that leak valuable air. These natural points come from the construction process and are most often found in areas like attics, basements, and exterior walls, and around objects such as windows, doors, electrical outlets, light fixtures, and pipes. Over time the continual leakage of conditioned/heated air can affect energy bills and indoor air quality.

Leaving these air leaks untouched is like leaving your windows open on a hot summer day while the AC is running. It’s not a good idea. That’s why air sealing is the ideal solution.

Clear plastic vapor‑barrier sheeting stapled to interior wall framing, with a small bead of spray foam sealing an electrical wire penetration through the stud.
Close-up of pink fiberglass insulation with spray foam air sealing around electrical wire penetration in a wood-framed wall.

What is Air Sealing?

Air sealing takes care of the gaps and cracks throughout the building envelope by preventing the flow of air between the interior and exterior of your home or building. Unwanted outside air is no longer allowed to slip in while valuable heated or conditioned air slips out. Gaps are sealed by foam or caulk for the most effective and durable solution.

Air sealing is most often done before the installation of insulation in a home or building. Together these two products work in tandem to maximize a structure’s energy efficiency by creating both an air barrier and a thermal barrier.

Types of Air Sealing

The most common types of air sealing include:

Worker applying sealant with a caulking gun to a vertical brick‑wall joint for air‑ and weather‑barrier continuity.

Caulking

This synthetic and flexible material is used to seal tiny gaps, usually less than a quarter inch wide. It’s often paired with fiberglass insulation for maximum effectiveness.

Residential interior showing newly installed spray foam insulation between wall studs and exposed mechanical ductwork overhead.

Spray Foam Insulation

This highly effective option works as an insulator and air sealant in one step, eliminating the need for a separate insulation material. It’s a perfect way to add additional R-value to your home or building while sealing air leaks.

Our highly trained crew will evaluate your new or existing home or building to determine which type of air sealing is best for your project.

Benefits of Air Sealing

Enjoy these benefits that an air sealed building brings: 

Increased Energy Efficiency

Sealing gaps and cracks creates an airtight building envelope that prevents wasted air while increasing energy efficiency.

Say Goodbye to Drafts

Annoying drafts become a thing of the past with proper air sealing.

Better Indoor Air Quality

Air sealing eliminates the openings that allow pollen and other allergens to leak into your home or building, keeping the air inside cleaner.

Increased Comfort

By sealing air leaks, your HVAC unit won’t have to work as hard to maintain a stable indoor temperature, providing you and future visitors with a more comfortable environment.

Lower Energy Bills

Less stress on your HVAC unit means less wasted energy and lower utility bills.

Your Partner in Energy Efficiency

Air sealing combined with insulation is a vital part of creating an energy-efficient home or building. Whether you are updating your current home or commercial building or starting from the ground up, Cullen Insulation is here to deliver the highest quality products and services to our Fargo community and beyond. Local homeowners, builders, and contractors count on our highly trained team to evaluate their home or business and provide the best air sealing products for their projects. You can too. We’re a company built on quality and driven by people. Our team takes the time to make sure every job is done right, and every customer is satisfied with the final product. Contact us today to learn more about air sealing your new or existing residential or commercial building.