Hot Melt Waterproofing continues to increase market share

Hot Melt Rubberised Bitumen membranes continue to take a growing share of the inverted roofing market together with structural decks such as balconies and podiums, by offering value for money and long term permanent solutions. Some experts claim that this product has taken more than 45% of a market sector once dominated by mastic asphalt.

The two products are very similar, both offering seamless application and incredible longevity, but the price differential, on average some 50% lower for Hot Melt has been a deciding factor in its rapid growth over the last 20 years.

Hot melt is a membrane that is applied as a hot liquid directly to a prepared structural deck to create a completely seamless, monolithic layer. It is suitable for use as the waterproofing layer for most new build and refurbishment flat roofing applications.

The most common application of hot melt is an inverted roof system where the membrane is laid directly on the deck and insulation is laid on top, weighed down with ballast materials such as 20-40mm gravel or 50mm paving slabs. Hot melt inverted roofs have many benefits, not least that they can be completely flat.

With an increasing market demand for roofs that fulfil multiple purposes; plant installation, public amenity, access, even storage, there is a need for cost-effective, robust, long lasting, structural waterproofing solutions. Hot melt waterproofing systems have a proven track record of life expectancy, performance, tolerance to wide extremes of weather and generate excellent return on investment.

Hot Melt systems such as those manufactured and supplied by Proteus Waterproofing are also being increasingly used under green roofs. The seamless application which also prevents tracking makes it the ideal membrane for such applications where replacement costs could prove prohibitive in the event of failure.

It is yet another reason why Hot Melt continues to grab market share from mastic asphalt which has traditionally been the membrane of choice for green roofs – but not it seems for much longer.