What is considered combustible material?
A combustible material is any material that, under normal conditions, will ignite and burn, or contribute additional heat to an ambient fire.
What class are non-combustible materials?
A fire rating is achieved by testing how materials react in the initial stages of a fire. The Euroclass classification (EN 13501-1) breaks reaction to fire down into categories, with ratings that vary depending on the spread of flame, smoke production and any flaming droplets.
'Non-Combustible materials' are always given an A1 or A2 fire rating.
What is the difference between non-combustible and fire-retardant?
If something is non-combustible, it will not burn under normal conditions, whereas fire-retardant materials will contribute to fire once any compounds or chemicals which have been added to inhibit fire have burned off. Therefore, fire-retardant materials are indeed 'combustible'.
What does A1 fire rating mean?
The European Reaction to Fire classification system is the EU common standard for understanding a products fire performance. A Euroclass A1 fire rating is - by definition - 'non-combustible' meaning it will not burn under normal conditions.
The European Commission decision of 4th October 1996 lists the products which are classified as having 'no contribution to fire' and can therefore classify as A1 fire rated. Some examples of the materials listed include steel, copper, aluminium, glass, ceramics, concrete and natural stone.
Is composite decking fire-rated?
Traditional composite decking combines timber and plastic elements to produce a deck board which is certainly safer than timber decking. This type of composite cannot be considered 'non-combustible' and will achieve a Euroclass C (limited contribution to fire) or Euroclass B fire-rating (very limited contribution to fire): our Performance Composite Decking Board is Class B fire-rated.
On the other hand, Vitrified Composite™ is manufactured from clay and feldspar, and then subjected to a firing process that alters its material's chemical properties. This process of vitrification results in a material not dissimilar to porcelain, which is why it is able to achieve a Class A1 fire rating.