Loin Concrete Cement Air Brick Internal/Protected Application - Essential Ventilation Unit

Controlled Airflow for Wall and Chimney Voids

 

The Loin Concrete Cement Air Brick (INT) is a dedicated masonry unit designed to ensure controlled, passive ventilation in specific areas of a building's structure. While conventional air bricks focus on external exposure (like sub-floor voids), this internal variant is often used to vent areas such as:

• Chimney Breasts: Providing airflow to disused flues or chimney voids to prevent dampness and condensation.

• Cupboard Voids: Allowing air circulation behind fitted units or within dry-lined walls.

• Service Areas: Venting small, internal utility or service voids.

Manufactured by Loin Concrete from durable cementitious materials, this air brick offers reliable, continuous airflow, which is critical for preventing moisture-related issues, mildew, and rot within concealed sections of the building. Its use ensures compliance with building requirements for managing moisture and maintaining structural health in areas where an external vent is either unsuitable or unnecessary.

 

Key Features

 

• Brand: Loin Concrete

• Product Type: Cement Air Brick / Ventilator Block (INT classification)

• Function: Passive ventilation for internal or protected voids

• Material: Durable Cement/Aggregate Mix

• Dimensions: Standard brick size (designed to fit seamlessly into conventional brick courses)

• Design: Multiple openings or slots allowing controlled air movement.

• Application: Chimney ventilation, internal wall voids, and dry-lining protection.

 

Ideal For

 

• Chimney Stack Sealing: Vents required when capping a disused chimney to allow moisture to escape the flue.

• Internal Room Vents: Providing air exchange in pantries, cupboards, or small utility rooms.

• Renovation Projects: Introducing ventilation into sealed-off or dry-lined wall spaces to combat damp.

• Service Voids: Ensuring necessary airflow around pipes or electrical conduits within large walls.

 

Why You Will Love It

 

• Damp Control: Critically prevents moisture and condensation buildup in hidden voids, protecting structure and finishes.

• Structural Health: Essential for the longevity of brickwork and timber in protected areas like chimney breasts.

• Seamless Integration: Fits perfectly into masonry for a neat, plaster-ready finish.

• Durable: Cement construction ensures the vent will not degrade over time within the wall structure.

 

What's in the Box

 

• 1 x Loin Concrete Cement Air Brick (INT)

 

Top 3 Frequently Asked Questions (FAQs)

 

1. Is this internal air brick fitted with a mesh or gauze?

   • Due to its internal classification, it may not include an external mesh (as it's often not facing the environment). However, it's common practice to fit a fine nylon or metal mesh screen behind the vent during installation, especially when venting a disused chimney, to prevent debris or insects from entering the room.

2. How is this used when sealing a chimney?

   • When a chimney flue is closed off, building regulations require permanent ventilation at the top (capped) and the bottom (usually in the wall below the ceiling) to maintain air circulation. This air brick is typically used for the lower vent to prevent stagnant air and dampness.

3. Can I use this for my main sub-floor ventilation?

   • While functional, for main sub-floor vents that face direct weather exposure and require pest control, it is recommended to use a dedicated external air brick that is rated for weather resistance and often comes with an integrated mesh.