ROOFING F
or generations, lead has been the default material for roof flashings for pitched roofs, valued for its durability, malleability and long-standing presence on site. But good leadwork requires training, precision and experience, and in a market plagued by skills shortages, high-performance lead-free alternatives are offering a solution. That’s according to Mat Woodyatt, portfolio manager – components at Klober, who says that, while lead still plays a crucial role in heritage and conservation projects, lighter, polymer-based alternatives are increasingly specified for new-build housing, extensions and public sector schemes. “These materials reduce handling risks, eliminate waste disposal concerns and can be shaped and installed easily, all while providing long-term weather protection and a clean, consistent finish,” he says.
Woodyatt says that high-performance lead- free flashings are typically manufactured from advanced polymers reinforced with metal mesh, a combination which provides stretch and pliability as well as tear resistance and durability. The material can be shaped directly on the roof, removing the need for pre- forming and reducing handling time at height. He explains: “One example of this material is Wakaflex. Designed for use in most modern pitched roofing applications, it is lightweight, non-toxic and carries no scrap value, reducing the risk of theft. Its unique self welding technology means that it can be applied without the use of clips and glues, and with a 20-year guarantee, contractors can have confidence in its long-term performance. It is also supported by BBA certification, achieved following independent 3rd party testing, and is acceptable under NHBC standards, offering
LEAD-FREE FOR A FASTER FUTURE
BMJ finds out how a clear understanding of lead-free flashing can help merchants support customers
reassurance on new-build projects.” Beyond abutments, products of this type are increasingly used at dry valley junctions, particularly at the top saddle detail where a neat, weathertight seal is required. Woodyatt says that their ability to conform closely to changing profiles makes them well-suited to this junction.
He adds: “For roof penetrations, purpose- designed outlet systems provide an alternative to traditional lead slates. Solutions such as our Wakaflex Uni Outlet combine a flexible upstand with a formable base, allowing installers to create a tight, weathertight seal around pipes and service penetrations. Designed to be trimmed to suit a range of diameters and dressed directly to the roof
covering, they support consistent detailing while helping to resist wind uplift and water ingress. Used alongside lead-free flashing at abutments and junctions, they form part of a wider system approach that simplifies installation across the roof.”
While the principles of flashing and the role it plays in roofing remains unchanged, the way modern materials are handled and installed on site offers clear advantages.
Lead-free flashings are significantly lighter than traditional lead products, making them easier to transport, carry and position at height. This reduces physical strain and can improve productivity, helping meet tight project deadlines. In contrast to traditional leadwork, which can require specialist skills these alternatives offer a more straightforward approach to installation.
Flexibility is another practical advantage, Woodyatt says. Materials can be shaped directly in situ, avoiding the need for pre- forming and reducing the risk of errors before installation begins. This allows installers to work more efficiently, particularly when dealing with complex roof profiles. “Premium lead-free products also feature narrow adhesive strips along the edges rather than a fully butyl-covered backing. Rather than dealing with fully bonded materials that can stick prematurely, installers have greater control over positioning, allowing adjustments to be made before the flashing is fully fixed in place. This not only improves accuracy but also reduces material waste and frustration on site,” he explains.
The overall effect, Woodyatt believes, is 36
www.buildersmerchantsjournal.net April 2026
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