Air Brick Vented 215 x 50mm Buff

The Air Brick Vented 215 x 50mm Buff by Principal Building Products Ltd is a durable, fired clay ventilation brick engineered to deliver reliable passive airflow to subfloor voids and cavity walls. Designed for both trade professionals and DIY builders, this buff clay air brick integrates cleanly into standard UK brickwork coursing, helping to prevent moisture build-up, timber decay, and condensation in line with UK Building Regulations (Approved Document F and Approved Document C).

Key Features and Specifications

• Dimensions: 215 mm (length) × 50 mm (height) × 50 mm (depth) — a slim, single-course-height format
• Material: High-quality fired clay — frost-resistant, weatherproof, and maintenance-free
• Perforation type: Square-hole grid for consistent, unrestricted passive airflow
• Colour: Buff — natural warm tone to complement buff, yellow, and light-coloured brickwork
• Face size: 215 × 50 mm — fits standard UK brick coursing without cutting
• Supplier: Principal Building Products Ltd
• Compliance: Suitable for use in applications governed by Approved Document F (ventilation) and Approved Document C (moisture resistance)
• Finish: Smooth clay face for a neat, inconspicuous installation

Applications

• Suspended timber floor ventilation — prevents damp air accumulation beneath floor joists, protecting structural timbers from rot and fungal decay
• Cavity wall ventilation — promotes continuous airflow within wall cavities to reduce condensation risk
• Subfloor void ventilation in new builds, extensions, and renovation projects
• Outbuildings and garages — provides passive ventilation where mechanical systems are impractical
• Heritage and restoration work — buff clay finish matches traditional masonry on period properties
• Replacement air brick installations — slim 50 mm depth suits narrower wall sections and rendered panels

Why Choose This Product

Fired clay construction ensures long-term durability, colour stability, and frost resistance — outperforming plastic alternatives in exposed external positions. The buff finish blends harmoniously with the majority of light-coloured UK brickwork, making it the preferred choice for aesthetically sensitive projects. The standard 215 mm length slots directly into existing brickwork without modification, reducing installation time on site. Trade quantities are welcome, making this an efficient choice for builders, groundworkers, and contractors managing multiple plots.

Delivery in and Around London

We deliver the Air Brick Vented 215 x 50mm Buff to inner London boroughs including Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas such as Enfield, Bexley, Redbridge, and Barnet. We also serve the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Trade quantities are welcome — contact us for volume pricing and scheduled site deliveries.