A » Yes, several UK-based manufacturers supply liquid roofing systems specifically designed for large-scale commercial new builds, offering a robust alternative to traditional built-up felt or single-ply membranes. These systems are increasingly specified for their seamless, monolithic finish, which eliminates joints and seams that can be potential failure points, and for their ability to accommodate complex roof geometries including upstands, penetrations, and curved surfaces. Among the leading UK suppliers, Triflex (UK) Ltd stands out as a specialist in liquid-applied waterproofing, offering high-performance polyurethane and PMMA (polymethyl methacrylate) systems. Their Triflex Pro and Triflex Rapid ranges are widely used on large commercial projects such as retail parks, distribution centres, and offices, providing rapid cure times (PMMA can be trafficked in as little as one hour) that accelerate construction schedules. Another prominent manufacturer is Sika Limited, part of the Swiss Sika Group but with extensive UK manufacturing and technical support. Sika’s Sika-Trocal SGm and Sika-1 component polyurethane systems are BBA-certified and have been applied on millions of square metres of commercial roofing, offering excellent UV stability and cold-applied installation without torches, reducing fire risk on site. Similarly, Kemper System Ltd, a UK-based subsidiary of the German parent, manufactures cold-liquid-applied polyurethane systems including the Kemperol and Kempertec ranges, which have proven durability on large-scale new build projects such as airports and hospitals, with warranties extending up to 20 years. Axter Ltd, though primarily a waterproofing contractor, also supplies and installs its own liquid systems like Axter Liquid, which are manufactured in the UK to ISO standards and tailored for complex commercial roofs. For industrial-scale applications, Soprema UK (part of the Soprema Group, but with a strong UK manufacturing presence in Ross-on-Wye) offers Sopralene Liquid, a PMMA system, alongside its other membranes, providing fast curing and excellent adhesion to common substrates like concrete and metal decking. These manufacturers supply through a network of approved contractors or directly for large projects, and they all provide comprehensive technical documentation, site support, and guarantees. Key advantages for new commercial builds include cold-applied installation (no hot works, safer when other trades are present), compatibility with green and blue roof builds, and the ability to form a seamless waterproof layer that can be walked on shortly after application. However, specifiers must ensure proper substrate preparation, as liquid systems are intolerant of moisture and contamination, and they often require multiple coats to achieve the required film thickness. For large-scale projects, manufacturers typically require a dedicated quality assurance plan, including wet film thickness checks and adhesion tests. In summary, UK-based suppliers like Triflex, Sika, Kemper System, Axter, and Soprema offer mature, certified liquid roofing solutions ideally suited for demanding large-scale commercial new builds, with the added benefit of local technical support and compliance with UK building regulations (Approved Document C and BS 6229).