Brown Air Brick
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Product Details
A Brown Air Brick, also known as a Ventilation Brick, is a specialized building material used to improve airflow and ventilation in homes. It is typically made from clay or plastic and features perforations that allow air to pass through while keeping debris out. This material is commonly used in cavity walls, under floors, and in fireplaces to enhance ventilation and prevent moisture buildup. The 9x3 size is a standard dimension for many air bricks, making them easy to integrate into existing brickwork. Air bricks like these are essential for maintaining healthy airflow and preventing damp issues in homes, especially when installed above the damp-proof course.
As of August 2026, PriceNailer data confirms that the cheapest price for Brown Air Brick is £1.44 from Selco across 6 suppliers. Prices have remained stable over the last 12 months.
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Frequently Asked Questions
What standard sizes do brown air bricks come in?
Brown air bricks are commonly available in 9x3 inch (215x68mm) and 9x6 inch (215x140mm) sizes. The 9x3 size is the most popular for standard cavity wall ventilation and matches typical brick coursing heights.
Where should brown air bricks be installed in a wall?
Brown air bricks should be installed at least 150mm above ground level and above the damp-proof course. They're typically placed in cavity walls, under suspended timber floors, and in areas requiring ventilation like utility rooms or garages.
What's the difference between clay and plastic brown air bricks?
Clay air bricks offer better durability and weather resistance but are more expensive. Plastic air bricks are lighter, easier to install, and more cost-effective, but may not match the exact colour of clay bricks over time.
How many air bricks do I need for adequate ventilation?
Building regulations typically require one air brick per 1.5 metres of wall length for underfloor ventilation. For cavity walls, you'll need sufficient air bricks to provide the required free air area, usually calculated by a building professional.
Can I install brown air bricks in existing brickwork?
Yes, brown air bricks can be retrofitted into existing walls by carefully removing a standard brick and mortar, then fitting the air brick with appropriate mortar. Professional installation is recommended to maintain structural integrity.