When it comes to specifying waterproofing membranes for roofs and under floating decks, several specifiers prefer the added thickness and reassurance that the extra membrane layer provides in a staggered two-layer torch-on system. Torch-on membranes have stood the test of time and continue to do so. In recent times, there has been some industry movement away from the use of a flame for installing materials on a building site — for obvious reasons.

Despite the growth in popularity of alternative wide sheet single-ply weldable membranes that do not require a flame for installation, there is still significant demand for two layers of bituminous membrane... the catch being that they are applied with a propane gas torch.

Specifiers can now have their cake and eat it too, with the introduction of Viking Roofspec’s new ‘Halley-P’ No Flame Bituminous Membrane System. A two-layer system installed in the same staggered format as a traditional torch-on system, except that both layers are self-adhering, the use of a flame for a successful installation is not required.

Both the ceramic cap (black or grey) and base sheet membrane rolls, have a release paper on their underside, which makes installation very quick. The factory-applied adhesive has been specially formulated, so it cannot be combined with any other membrane type. This ensures the Halley-P NO FLAME ‘system’ is installed exactly as that — as a ‘system’. Once the roof installation is complete, the bond between the membrane layers to each other and to the substrate, continue to strengthen over time.

Halley-P’s chemical make-up is a hybrid of bitumen compounds which combine the tensile strength and puncture resistance of an APP (plasticised) bitumen, with the flexibility of an SBS (rubberised) bitumen. Halley-P’s temperature flexibility range means that it can be installed in areas with temperatures as low as -25°C, up to +120°C.

For more information on the revolutionary Halley-P NO FLAME bituminous membrane system, contact Viking Roofspec on 0800 729 799 or [email protected]