Air Leaks Are Costing You More Than You Think
When a commercial building shows high energy bills, uneven temperatures, or condensation forming inside wall assemblies, the problem often traces back to one thing: uncontrolled air movement through the building envelope. Air finds every gap, seam, and penetration in a wall, carrying moisture and heat along with it. A fluid-applied membrane air barrier stops that movement at the source, sealing the envelope as one continuous layer.
At Ecofoam Insulation and Coatings, we install fluid-applied membrane air barriers that protect the structure, improve comfort, and lower operating costs. Known as “The Spray Foam Insulation Experts,” we bring the same attention to detail to air barrier work that we apply to every spray foam and coating project. This page explains how these systems work, where they perform best, and what you can expect when we handle the installation.
What a Fluid-Applied Air Barrier Does
A fluid-applied membrane air barrier is a coating that we spray or roll directly onto exterior sheathing, concrete masonry units, or other substrates. Once cured, it forms a seamless, monolithic film that blocks air and bulk water while allowing water vapor to pass through in many product formulations. This combination is what makes the system so effective: it keeps liquid moisture out but lets the wall assembly dry, reducing the risk of trapped moisture and mold.
Unlike sheet-applied membranes that rely on overlapping seams and mechanical fasteners, a fluid-applied product bonds fully to the substrate. There are no gaps at laps to fail over time. This full adhesion is what gives the building envelope air barrier its durability, and it is why architects and builders increasingly specify these systems for demanding projects across the Southeast.
The Installation Process We Follow
A membrane only performs as well as the crew that installs it. Our process is built around surface preparation, correct application thickness, and detailing at transitions, because these are the areas where most air barrier systems fail. We treat every project as a sealed system rather than a single coating.
Here is how a typical fluid-applied membrane air barrier installation moves through our workflow:
- Substrate inspection: We check the sheathing or masonry for cracks, gaps, and moisture before any material goes down.
- Surface cleaning and priming: Dust, debris, and contaminants are removed so the membrane can achieve full adhesion, with primer applied when the substrate requires it.
- Detailing of joints and penetrations: Sheathing joints, rough openings, pipe penetrations, and transitions receive detail coating or reinforcing fabric first.
- Field application of the membrane: We spray or roll the coating to the manufacturer-specified wet film and dry film thickness across all field areas.
- Cure and quality verification: We confirm coverage, thickness, and continuity before any cladding or insulation goes over the barrier.
Technical Specifications That Matter
Fluid-applied membrane air barriers are measured by several performance criteria, and understanding them helps you know your envelope is doing its job. Air permeance is the primary metric, and code-compliant assemblies must meet strict limits on how much air passes through the barrier at a given pressure. A properly applied membrane easily meets or exceeds these thresholds when installed at the correct thickness.
Vapor permeability is the second consideration. A vapor permeable membrane lets the wall breathe, which is ideal for many wall designs in humid coastal climates. Other projects call for a vapor-closed weather-resistive barrier. We help you match the product to the wall assembly so moisture control works with your design rather than against it. Elongation, tensile strength, and UV exposure ratings also factor into product selection, especially when the membrane may sit exposed for extended construction schedules.
Where These Systems Deliver Results
Commercial air barrier work covers a wide range of structures. We apply fluid-applied membranes on retail centers, warehouses, schools, medical facilities, and multi-family buildings. Each of these benefits from a continuous moisture barrier that reduces energy loss and protects interior finishes from water intrusion. On concrete masonry walls, the fluid-applied approach fills surface irregularities that sheet products struggle to seal.
These systems also pair naturally with our spray foam and insulation services. When an air barrier and continuous insulation work together, the building envelope performs as a coordinated system, cutting heating and cooling loads throughout the year. As an insulation contractor and spray foam installer serving the region, we can design and install both layers with one accountable crew rather than coordinating multiple trades.
Why Work With Ecofoam Insulation and Coatings
With over a decade of experience, we serve residential and commercial clients across Hardeeville, Charleston, Columbia, Greenville, Hilton Head, SC, as well as Savannah, GA, and Jacksonville, FL. We are licensed, insured, bonded, and certified, which means your project meets code and stands up to inspection. Our mission centers on energy efficiency and sustainable building science, and a well-installed air barrier is a foundation of that goal.
As an air barrier contractor focused on building envelope solutions, Ecofoam Insulation and Coatings brings craftsmanship, timely completion, and competitive pricing to every job. If you are planning new construction or a renovation and need a fluid-applied membrane air barrier that performs for the life of the building, reach out to discuss your project. We are ready to help you build a tighter, drier, more efficient structure.
