Thursday 9th April 2026
Disclaimer: This guide is for general information only. It does not constitute professional fire safety advice. Always consult a qualified fire safety professional and follow the latest UK regulations, including the Regulatory Reform (Fire Safety) Order 2005, when assessing fire risks or selecting fire safety equipment.
A class A fire is a fire involving solid combustible materials, such as wood, paper, textiles, cardboard or plastics. These are the most common types of fire in both domestic and commercial settings. The right extinguisher, used promptly and correctly, can bring a class A fire under control before it spreads. Browse suitable options in our foam fire extinguishers category.
Estimated reading time: 5 minutes
Key takeaways:
- A class A fire involves solid combustible materials such as wood, paper, textiles and cardboard
- Class A fires are the most common fire type in homes and workplaces
- Water, water-mist, foam and dry powder extinguishers are all rated for use on class A fires
- CO2 extinguishers are not suitable for class A fires
- Class A fires can start and spread quickly if combustible materials are left near ignition sources
- Reducing combustible material in a space is one of the most effective ways to lower class A fire risk
What materials are involved in a class A fire?
A class A fire involves solid combustible materials. Common examples include wood, paper, cardboard, textiles, rubber and some plastics. These materials turn up in virtually every environment, which is why class A fires are the most frequently occurring fire type in the UK. They’re common in homes, offices, schools, warehouses and retail premises. Any environment with a significant amount of combustible solid material carries a class A fire risk.
How does a class A fire differ from other fire classifications?
The UK uses the European fire classification system to categorise fires by the type of fuel involved. Class A covers solid combustible materials. Class B covers flammable liquids, class C covers flammable gases, class D covers combustible metals and class F covers cooking oils and fats. There is also a separate category for electrical fires. Class A is the broadest category and covers the widest range of everyday materials, which is why it accounts for the majority of fires attended by UK fire and rescue services.
Which fire extinguisher is best for a class A fire?
Water or water mist extinguishers are the most common choice for class A fires. They cool the burning material below its ignition temperature, which stops combustion and reduces the risk of re-ignition. Foam extinguishers also work well on class A fires by cooling the fuel and forming a barrier against oxygen. Dry powder extinguishers carry a class A rating too, but they leave residue and reduce visibility, so water or foam are usually the better option indoors. Always check the extinguisher’s label to confirm it carries a class A rating before use.
Can you use a CO2 extinguisher on a class A fire?
No. CO2 extinguishers are not suitable for class A fires. CO2 works by displacing oxygen, which can suppress a flame temporarily, but it doesn’t cool the burning material. Solid combustibles retain heat and can re-ignite once the CO2 disperses. For class A fires, you need an extinguisher that cools the fuel directly. Water is the most effective option for that.
Where do class A fires most commonly occur?
Class A fires can occur in almost any setting. They’re particularly common in homes, where soft furnishings, bedding, curtains and paper materials are widespread. In workplaces, offices, warehouses and retail environments carry a higher class A risk due to the volume of paper, packaging and stored goods. Outdoor fires involving garden waste, wooden structures or skips also fall into the class A category. Because combustible solids are so universal, class A fire risk is something every home and business needs to consider.
How do you prevent a class A fire?
Reducing combustible material and controlling ignition sources are the two most important steps. Keep flammable materials such as paper, cardboard and textiles away from heaters, cookers and open flames. Don’t let rubbish or waste accumulate, particularly near heat sources or electrical equipment. Make sure smoking only happens in designated areas away from combustible materials. Test smoke alarms regularly and ensure your premises has an appropriate extinguisher in place. In workplaces, a fire risk assessment is a legal requirement under the Regulatory Reform (Fire Safety) Order 2005.
Are class A fires dangerous?
Class A fires are dangerous and can spread quickly, particularly where large amounts of combustible material are present. Smoke from burning solids can be toxic and disorientating, and fast-spreading flames can make escape difficult. Early detection and a prompt response are critical. A working smoke alarm and a correctly rated extinguisher close to hand can make a real difference to the outcome.
We stock a full range of fire safety equipment at Safelincs. If you want to make sure you’re prepared, take a look at our P50 Water Mist fire extinguisher and browse our complete range to find the right extinguisher for you.
All information correct at time of posting.
