Question 1

1. How do I know if I need air bricks for my project?

Accepted Answer

Determining whether you require air bricks depends on the type of construction and the specific ventilation needs of your property. Typically, the necessity for air bricks will be outlined in the building’s construction drawings or architectural plans, which specify their placement, quantity, and purpose to ensure proper airflow and moisture control. In residential and commercial projects, air bricks are essential in areas prone to moisture build-up, such as underneath flooring, in cavity walls, or near external wall openings. Consulting with a structural engineer or builder can help identify critical locations for ventilation and ensure compliance with building regulations, ultimately safeguarding your property against dampness, mould, and structural deterioration.

Question 2

2. Where can I find the UK building regulations for air bricks?

Accepted Answer

The relevant air brick regulations for underfloor ventilation depends where you’re building: 

If your project is in England, you can find details in Building Regulations, Approved Document C.
There’s a different version of this document for projects in Wales: Building Regulations, Approved Document C (Wales).
For projects in Scotland, consult the Building regulations handbooks linked here. Note: there are new technical handbook documents from January 2025.
You can also consult the NHBC standards.

Question 3

3. Are plastic air bricks as effective as clay ones?

Accepted Answer

Yes, modern plastic air bricks are highly effective at providing reliable ventilation, comparable to traditional clay variants. They are engineered to resist corrosion, weathering, and UV exposure, making them ideal for contemporary buildings where durability and low-maintenance are essential. Plastic air bricks are also lightweight and easy to install, offering flexible solutions for various applications including external walls, cavity walls, and ventilation in damp-prone areas. With advances in design and material quality, plastic air bricks now meet industry standards, ensuring excellent airflow and moisture control for both residential and commercial properties.

Air bricks and brickwork ventilation

Plastic Air Brick Buff 215 x 69 x 60mm (9x3)

Hepworth Clay Airbrick Square Hole Buff 215 x 140mm

Redbank Clay Airbrick Square Hole Red 215 x 140mm

Hepworth Clay Airbrick Square Hole Red 215 x 140mm

Redbank Clay Airbrick Square Hole Buff 215 x 65mm

Timloc Plastic Airbrick 215 X 60 X 69mm (9x3) Terracotta Red

Plastic Air Brick Black 229 x 76mm (9x3)

Redbank Clay Airbrick Square Hole Buff 215 x 140mm

Redbank Clay Airbrick Square Hole Red 215 x 215mm

Hepworth Clay Airbrick Square Hole Buff 215 x 65mm

Redbank Clay Air Brick Square Hole Buff 215mm x 215mm

Plastic Air Brick Terracotta Red 215 x 69 x 60mm (9x3)

Hepworth Clay Airbrick Square Hole Red 215 x 215mm

Clay Airbrick Square Hole Buff 215 x 215mm

Timloc Plastic Airbrick White 215 x 69 x 60mm