The Air Brick 215x140mm Square Hole is a robust, high-capacity ventilation component designed to provide essential sub-floor and wall cavity airflow in standard masonry construction. Manufactured from tough, weather-resistant material, this air brick is engineered to withstand heavy environmental wear, UV exposure, and rigorous weather conditions while maintaining reliable structural integrity over time.
 
Featuring a clean square-hole grid pattern, the vent delivers a generous free-air cross-sectional area to promote continuous, unobstructed air circulation while effectively restricting larger debris and pests from entering the building envelope. Its standard double-course dimensions of 215mm x 140mm allow it to fit seamlessly into conventional brickwork layouts, replacing standard brick coordinates without the need for complex cutting or structural modifications.
 
Essential for preventing dampness, condensation, and timber decay, this square-hole air brick ensures healthy ventilation beneath suspended floors and within large wall voids. Whether you are managing a new residential build, carrying out commercial masonry repairs, or upgrading sub-floor airflow to meet building regulations, this component delivers professional-grade performance and dependable durability.
 
Features & benefits
 
Resistant to frost
Resistant to colour fading
Allows air movement to reduce condensation build up
Holes sized to prevent vermin entry
Weathers well with surrounding brickwork