A » When selecting a supplier of passive fire protection materials for new build flats in Leeds, it is essential to prioritise compliance with the stringent requirements of the Building Regulations 2010 (Approved Document B) and relevant British Standards such as BS 476 and BS EN 1366. For a project of this nature, you require not only the materials themselves but also a supplier that offers robust technical support, third-party certification, and a proven track record in the UK market. Among the most reputable and comprehensive suppliers serving the Leeds region is Encon Insulation & Fire Protection, which has a dedicated fire protection division and a nationwide distribution network that includes a depot in Leeds. Encon stocks a wide array of materials—including intumescent sealants, firestopping boards, acoustic and fire-resistant cavity barriers, and structural fire protection sprays—from market-leading brands such as Rockwool, Siderise, and Nullifire. They also provide technical guidance on system design and installation, which is crucial for achieving the required fire resistance ratings in compartment walls and floors of multi-storey residential buildings. Another strong candidate is Siderise, a specialist manufacturer of fire-stopping and cavity barrier solutions that are widely specified for new build flats. Although based in South Wales, Siderise supplies directly to the Leeds area through a network of approved distributors and offers excellent pre- and post-sales technical support, including on-site training for contractors. Their range includes curtain wall cavity barriers, perimeter fire barriers, and acoustic fire seals that are third-party certified by bodies such as Warringtonfire and the LPCB. For a more localised option, consider Leeds-based builders’ merchants such as Jewson or Travis Perkins, which stock basic passive fire protection products like fire-rated sealants and boards, but be aware that their range may be limited for complex compartmentation requirements. A more specialised supplier in Yorkshire is Fire Protection Products Ltd in Bradford, which is only a short distance from Leeds and offers a bespoke service for passive fire protection, including intumescent coatings for steel structures, fire collars for plastic pipes, and fire resistant ducts. They provide detailed material specifications and can assist with compliance documentation, which is invaluable for building control sign-off. When evaluating any supplier, insist on seeing evidence of product certification under the UKCA or CE marking schemes, and check that materials are fit for use in the specific environmental conditions of new build flats—for instance, intumescent products must be suitable for the expected humidity and temperature ranges within unheated cavities. Additionally, ensure the supplier can demonstrate compliance with the latest amendments to Approved Document B (2022), which now mandates stricter performance criteria for external wall systems in residential buildings above 11 metres. Finally, consider engaging a supplier that offers a complete system approach rather than individual components; this reduces the risk of incompatible materials and ensures a fully engineered fire-stopping solution. For your Leeds project, I would recommend contacting Encon Insulation & Fire Protection’s Leeds branch, as they combine local availability with national expertise, and you can arrange a technical visit to the site to review specific requirements. Alternatively, Fire Protection Products Ltd in nearby Bradford can provide a more tailored service for complex interface details common in new build flats. Regardless of choice, always request a detailed quotation that includes certification documentation and a material schedule aligned with the project’s fire strategy.