Reinforced bitumen roof waterproofing system.
Thermaweld FireSmart is a polyester reinforced, styrene butadiene styrene (SBS) modified bitumen membrane with enhanced fire performance (spread of flame and fire penetration). The polyester carrier is impregnated and then coated in FireSmart® SBS modified bitumen. The upper surface is coated with mineral granules and given a 120 mm wide mineral-free selvedge finished with a thermofusible film. The underside is given a special grooved profile for torch-on application and is finished with a thermofusible film to prevent sticking in the roll.
FireSmart membranes are formulated using finely ground volcanic silicone rock which has withstood temperatures in excess of 5000°C. When a flame comes in to contact with the surface of the FireSmart membrane, the presence of volcanic rock brings about an endothermic reaction within the membrane. Heat is drawn from the flame to support a process of carbonization in the membrane, so reducing the burn temperature.
The resulting unbroken carbonised ‘shell’ then seals off combustible material beneath, denying the already-weakened flame further fuel and preventing any further combustion.
Features and benefits:
J41/10 Built-up reinforced bitumen membrane warm deck roof covering
J41/110 Built-up reinforced bitumen membrane warm deck roof covering
J41/12 Built-up reinforced bitumen membrane cold deck roof covering
J41/120 Built-up reinforced bitumen membrane inverted roof covering
J41/130 Built-up reinforced bitumen membrane cold deck roof covering
J41/405 Single layer reinforced bitumen waterproof covering
Thermaweld FireSmart Mineral
Standard product features
The external fire performance of a roof is dominated by the built-up roof system. No performance can be assessed for the product alone.