As buildings become more airtight and energy efficient, controlling air leakage and moisture movement is no longer optional. ARBOShield Pro Class A Air & Vapour Control Layer is designed to address these challenges while aligning with modern fire safety expectations.
Installed on the warm side of the wall, the membrane acts as a continuous barrier that limits uncontrolled air movement from the internal environment into the wall structure. This helps prevent heat loss, reduces the risk of condensation, and supports stable internal conditions. In real terms, it contributes to lower energy demand and improved long-term performance of insulation and structural components.
One of the defining features of this AVCL is its Class A2-s1, d0 fire rating. In applications such as high-rise residential buildings or public sector projects, internal membranes are increasingly scrutinised as part of overall façade fire strategies. ARBOShield Pro Class A AVCL offers reassurance that airtightness performance does not come at the expense of fire safety.
The membrane also provides an additional thermal benefit. Its reflective surface can enhance thermal resistance when installed adjacent to a still air cavity, helping improve the overall U-value of the wall build-up. While not a substitute for insulation, this contribution can support compliance with increasingly demanding energy efficiency targets.
From an installation perspective, the product is supplied in wide rolls to allow rapid coverage and reduced jointing. The system approach is a key advantage: when used alongside compatible ARBO sealing tapes, mastics, and membranes, installers can achieve consistent detailing across window reveals, corners, and service penetrations. This reduces risk on site and simplifies quality control.
The AVCL is particularly well suited to light steel frame and SFS constructions, where airtightness detailing can be challenging due to interfaces between materials. Its high tensile strength and tear resistance help it withstand installation stresses without compromising integrity.
For contractors and specifiers, ARBOShield Pro Class A Air & Vapour Control Layer offers a balanced solution that supports airtightness targets, moisture control, thermal efficiency, and fire compliance within a single, integrated membrane.
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