Fire protection is a critical part of building safety. Whether you’re working on a loft conversion, newbuild home, or commercial fit-out, using the right fire-rated wallboards is essential for compliance and peace of mind.
At CB Building Products, we supply a wide range of fire-resistant plasterboard for use across domestic and commercial settings. In this guide, we explain how to choose the right board, where it should be installed, and what UK regulations apply.
What Are Fire-Rated Wallboards?
Fire-rated wallboards, also known as fire-resistant plasterboards, are designed to slow the spread of fire. They contain additives like glass fibres, vermiculite, or other fire-retardant components that increase fire resistance.
Most come in standard sizes (e.g. 2400 x 1200mm) and thicknesses (typically 12.5mm or 15mm), and have a pink paper facing for easy identification.
Where Are Fire-Rated Boards Required?
Residential Applications
- Loft conversions: especially between habitable rooms and the roof space.
- Integral garages: where attached to the main house.
- Party walls: in terraced or semi-detached homes.
- Understairs storage: where flammable materials are kept.
Commercial Applications
- Stairwells and escape routes.
- Service risers and ducts.
- Partition walls in offices.
- Ceilings in multi-storey buildings.
Pro tip: Always check your fire strategy or speak with your building inspector. Fire protection for partitions is often part of regulatory approval.
Understanding UK Wallboard Fire Ratings
Wallboards are typically tested to BS 476-22 or EN 1364-1 fire resistance standards. The rating (e.g. 30 minutes or 60 minutes) reflects how long the board can withstand fire when installed correctly.
Common Fire Ratings:
- 30-minute protection – Suitable for garages, ground floor partitions, and ceilings.
- 60-minute protection – Required for stair enclosures or between floors in flats.
- 90+ minutes – Specialist applications like service risers or structural firewalls.
Note: The rating applies to the complete system – board, fixings, framing, and insulation. Simply using fire-rated plasterboard isn’t enough if it’s poorly installed.
Relevant UK Building Regulations
When selecting fire-rated wallboards for UK building regulations, the following parts are most relevant:
- Part B (Fire Safety) – Defines minimum fire resistance for elements like walls, ceilings, and doors.
- Part M – For accessibility, which may overlap with wall/fire protection strategies.
- Approved Document B – Specific guidance on materials, structures, and safety features.
How to Install Fire-Rated Plasterboard Correctly
Key Steps:
- Use correct thickness (12.5mm minimum for 30 minutes).
- Stagger joints to prevent weak points.
- Use fire-rated screws and fixings.
- Seal all joints with fire-rated jointing compound.
- Follow manufacturer recommendations exactly.
Improper installation may invalidate the fire rating. Always refer to British Gypsum, Knauf, or manufacturer data sheets for guidance.
Popular Products to Consider
At CB Building Products, we stock leading brands including:
- British Gypsum FireLine.
- Knauf Fire Panel.
- Siniat GTEC Fire Board.
These boards meet common fire resistance requirements and come in multiple sizes. Some also offer moisture or acoustic benefits, ideal for multipurpose spaces.
Need help calculating quantities?
Our team can assist with take-offs for fire-rated wallboard installations.
Domestic vs Commercial: What’s Different?
| Feature | Domestic Projects | Commercial Projects |
|---|---|---|
| Common Applications | Garages, lofts, party walls | Escape routes, ceilings, duct enclosures |
| Fire Rating Requirements | 30 to 60 minutes | 60 to 90+ minutes |
| Oversight Required | Building Control | Often requires Fire Engineer sign-off |
CB Building Products: Fire-Rated Solutions You Can Trust
Fire safety should never be compromised. As trusted drylining suppliers, we provide dependable advice and access to compliant products for homes and businesses alike.
Whether you need 10 boards or 100, we’ll help you find what meets your specification, budget, and deadlines.
FAQs
1. Are fire-rated boards required by law in homes?
Yes, in certain areas like garages, lofts, or multi-storey conversions, regulations often mandate their use.
2. Can I use fire-rated boards on ceilings?
Absolutely. They are ideal for ceilings in garages or between floors in flats.
3. Do I need special fixings for fire-rated plasterboard?
Yes. Use fire-rated screws, compounds, and ensure joints are sealed for full compliance.
4. What is the fire rating of 12.5mm fireboard?
When installed correctly, it typically offers 30-minute fire resistance, though this depends on the system.
Ready to Order or Need Advice?
Need help choosing the right wallboard?
We supply a wide range of fire-rated wallboards for UK building regulations.
Speak to our team for product recommendations, pricing, or delivery options.
Email: info@cbbuildingproducts.co.uk
Call: 01527 359 047