Comparing calorific values of facade cladding
In general, the lower the calorific value of a product, the better it is when it comes to fire safety. But what does this imply? When it comes to PCS value, two panels distinct themselves: fibre cement and stone wool (Rockpanel). They both have a very low caloric content. Stone wool, for example, is made from natural volcanic rock basalt, which can withstand extremely high temperatures by nature.
What we also see when comparing the PCS values of different materials is that some materials come in two versions: a standard version and an FR version (for example some HPL’s or ACM’s). The FR version has a similar PCS value, so a similar energy content as the standard version. These products all use fire retardants to achieve a higher classification. These fire retardants indeed slow down the ignition and burning of the product, nevertheless they are consumed during a fire and by this these products release their energy content in a later moment during a fire.