DON & LOW’s new MultiTX® Maxi underlay has achieved BBA certification, making it the only heavy-duty barrier roof underlay holding the BBA Agrément Certificate.

Part of the extended MultiΤΧ range, MultiTX Maxi is a high vapour resistance, air and liquid barrier underlay for use in pitched roofs. Weighing 190gsm, it provides durability and protection against the elements, helping to prolong the longevity of the roof.

MultiTX Maxi is designed to serve as a modern alternative to traditional bituminous-based (type 1F) roo­fing felts with low temperature flexibility, while also being resistant to water penetration and stabilised against UV degradation.

BBA Certification

Don & Low’s Technical Manager Mark Gray collected the BBA award.

The BBA Agrément Certificate is a mark of excellence based on rigorous national and European standards that validate a construction product’s specialist formulation, capability and uniqueness.

MultiTX Maxi has undergone a thorough evaluation that has quantified its performance. The BBA has determined that the new MultiTX Maxi is well suited to its intended use and can satisfy all relevant requirements of the essential building regulations.

Will Campbell, Head of Sales at Don & Low, commented: “The BBA Certificate of MultiTX Maxi represents a long history of technical competence and countless successes in our Research and Development and testing departments.

“As a vertically integrated manufacturer, Don & Low maintains total control over every step of the in-house production process. This allows us to maintain the highest quality standards and consistent product performance, resulting in innovative and cost-effective solutions tailored to the needs of the construction industry.”

MultiTX Range

The extended MultiTX range of barrier roof underlays now consists of four products: MultiTX® Plus (116gsm), MultiTX® Pro (145gsm), MultiTX® Maxi (190gsm) and the specifically engineered for integrated solar roofs MultiTX® Solar.

The BBA Agrément Certificate for MultiTX Plus, MultiTX Pro and MultiTX Maxi can be found here.

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