Fire proof MEETING NEW FIRE STANDARDS

With the fire rating of waterproofing systems under increasing scrutiny since the Grenfell fire disaster, it is becoming increasingly important for specifiers and building owners to consider the fire classification of waterproofing systems.

The Mastic Asphalt Council has recently tested its Recreation Duty (RD) Grade Mastic Asphalt system incorporating glass fibre tissue underlay to the European fire classification standard EN 13501-1. It successfully achieves a fire classification rating of Bfl-s1, confirming the product is flame retardant with very limited smoke development.

In addition, when fully supported on a concrete substrate, mastic asphalt achieves an EXT.F.AA fire rating to BS 746: Part 3 and has a BROOF (t4) classification in accordance with BS EN 13501-5:2016.

MAC Director Malcolm Grinstead said: info@masticasphaltcouncil.co.uk

Traditionally consisting of graded limestone aggregate bound together with bitumen, today’s mastic asphalt systems are now manufactured using advanced polymer modified formulations to ensure all the performance characteristics of traditional asphalt systems, with the added benefits of increased flexibility, enhanced handling and sustainability. The incorporation of modern polymers into mastic asphalt systems has helped lead to its resurgence in the construction industry.

Mastic asphalt has achieved the European Standard Bfl-s1 fire classification, making it the perfect choice for specifiers who need to demonstrate exceptional fire ratings on their project.

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Recreation Duty Mastic Asphalt is manufactured in the UK and is ideal for use on roofs, access walkways, balconies, terraces, podiums, plant rooms and stairways.

For specifiers and contractors seeking an efficient, cost-effective and simple to install way to weatherproof the exposed parts of buildings, mastic asphalt is a proven, long-lasting surfacing material. Seamless, durable and with exceptional waterproofing characteristics, mastic asphalt can be installed with minimal disruption and downtime.

For major projects, mastic asphalt is usually taken to site by hot charge tankers direct from the manufacturer to the point where it is needed for rapid installation - a major advantage for contracts with critical time constraints. For smaller projects solid blocks are preheated in boilers placed at ground level. At no time is there any type of naked flame at the point of installation and because mastic asphalt is so highly flame resistant, there is little or no potential fire risk.

No Naked Flame

As mastic asphalt is laid in molten form, it is often confused with other types of waterproofing membrane that require naked flame or torch on application. In reality, there is no naked flame at the point of installation and because mastic asphalt is so highly flame resistant, there is little or no potential of fire risk.