A fluid-applied air and weather barrier is a liquid membrane installed over exterior wall substrates to create a continuous protective layer. Once cured, the system helps control uncontrolled air leakage and water intrusion behind exterior cladding, including EIFS, stucco, brick veneer, and metal panels.

Fluid-applied air barriers are typically installed over compatible exterior wall sheathing or masonry substrates before cladding is installed. Common applications include commercial buildings with EIFS, stucco, brick veneer, metal panels, and other exterior wall assemblies.

Yes. Fluid-applied air and weather barrier systems can be installed during commercial building restoration when the exterior wall assembly is accessible and properly prepared. Existing cladding may need to be removed to inspect and repair damaged substrates before the new barrier system is installed.

An air barrier controls unintended airflow through a building envelope, while a weather-resistant barrier helps prevent liquid water from reaching vulnerable wall materials. Many fluid-applied systems are designed to perform both functions when installed as part of a properly detailed exterior wall assembly.

The service life of a fluid-applied air and weather barrier depends on the product, substrate preparation, installation quality, and overall wall assembly design. Properly installed systems are intended to provide long-term protection behind exterior cladding, but performance depends on maintaining compatible flashing, joints, and transitions.

Yes. Properly installed fluid-applied air and weather barriers help limit water intrusion and uncontrolled air movement behind exterior cladding. This can reduce the risk of concealed moisture damage to wall sheathing, framing, and other building envelope components.