FIRE RATINGS

The fire-resistant rating is measured in 30-minute increments, meaning each level of protection extends the material’s ability to withstand fire before failing and allowing flames to spread. 30-minute intervals are accepted as a practical compromise between test accuracy and real-world construction requirements. Ratings typically start at 30 minutes and increase to 60, 90, 120, and up to 240 minutes.

The most commonly used fire boards are those classified for 30, 60, and 240 minutes, as they align with Building Regulations:

• 30-minute boards: Serve as the basic standard, ensuring materials meet the minimum fire resistance requirement.

• 60-minute boards: Frequently required for ceilings, staircases, and commercial spaces, offering extended protection.

• 240-minute boards: The highest-rated category, mandatory for high-occupancy buildings such as theaters, government offices, and public spaces, where strict fire safety regulations apply.

A1 FIRE BOARDS

A1-classified materials represent the highest standard of fire resistance, as they are non-combustible and do not contribute to fire spread, smoke production, or toxic emissions. These materials are widely used in construction and industrial applications where fire safety is a priority. A1-classified materials are used in high-rise buildings, public buildings, industrial facilities, transport infrastructure or fire-resistant doors.

COMMON A1 FIRE RESISTANT MATERIALS:

• Stone or Glass Wool – Excellent insulation and fire protection properties.

• Calcium Silicate Boards – High-strength, non-flammable boards used in fire-rated partitions.

• Cement-Based Boards – Used in fireproof cladding and structural protection.

• Gypsum Boards (with A1 Classification) – Special formulations provide enhanced fire resistance.

• Aerated Concrete (AAC Blocks) – Lightweight, non-combustible construction material.

 FIRE SLABS

Fire Slabs are well-known to architects as high-performance fire-resistant materials. Thanks to their natural fire resistance, they are one of the most commonly chosen products in construction. Fire Slabs come in various densities and are easy to install using the friction fitting method. Their rigidity ensures that they do not sag over time, preventing gaps that could allow fire to spread.

TYPES OF FIRE SLABS AND THEIT APPLICATIONS:

• Black tissue faced – Commonly used in underground garages and parking lots for fire protection.

• White tissue faced – Preferred in areas where aesthetic appearance is important.

• Aluminium Foil faced – Used in locations where heat reflection is a priority.

• Black foil faced – Designed for heat absorption and applications where a black finish is required.

It is important to regularly check the current regulations and contact the manufacturers of  fire-resistant materials for the most up-to-date information. a1firerated.co.uk is not responsible for any inaccuracies or outdated information provided here.