Read the latest magazine Featured Solutions Insulation Mayplas Thermal Soffit Achieves A2 Reaction to Fire Classification 12 June 2025 MAYPLAS’ Thermal Soffit, just launched in March, has now achieved an A2 Reaction to Fire classification and has been renamed ‘Thermafire A2 Soffit’. The product is part of a range of insulation that Mayplas, a specialist manufacturer of passive fire protection, acoustic and thermal insulation, offers the housebuilding and construction industries. Confirmed following testing as Reaction to Fire A2-s1,d0 according to BS EN 13501-1, the limited combustibility slab provides thermal and acoustic insulation within the soffit at the party wall junction. Available in thicknesses of 100mm and 150mm, permitting the design of thermal performance to suit the construction, the Mayplas Thermafire A2 Soffit facilitates thermal resistance values to Approved Document L. It is suitable for both masonry and timber frame constructions. It also provides resistance to the passage of sound, synonymous with stone mineral wool insulation. Mayplas Thermafire A2 Soffit Standard 600mm x 600mm slabs can be cut to size on site to ensure an accurate cut to fill the full soffit void at the party wall. The soffit can be secured through the product to the timber truss or masonry block using the correct length of fixing for the width of the product. Mayplas can supply appropriate fixings. In terms of application, the Thermafire A2 Soffit is valid for any wooden-based substrate* and is also valid with or without a cavity to the opposite side. “Achieving an A2-s1, d0 Reaction to Fire classification for our Thermafire soffit product is proving very useful,” comments Michael Hunter, Mayplas’ Technical Director. “The test results open up new applications which we look forward to exploring with our housebuilder customers and with the construction industry more broadly.” The Thermafire A2 Soffit is foil faced to provide an effective vapour barrier and the foil also prevents fibre migration. *Download the technical data sheet here. Mayplas is a member of the Association for Specialist Fire Protection and the Structural Timber Association. Mayplas manufactures a range of fire, acoustic and thermal insulation products at its facility in Bury, Greater Manchester, well-located for UK-wide distribution. Mayplas can accommodate virtually any insulation specification, working with architects, contractors, developers, distributors and merchants. Mayplas is part of the Performance Technology Group. To find out more, visit the Mayplas website. >> Read more about Mayplas in the news Previous article How Celotex’s Technical Team Adds Value Through Expert Insulation SupportNext article Roof Repair vs. Replacement: How to Know Which One You Need Share article You may also like View all News Featured Solutions +3 19 March 2026 Flush Fitting Rooflights by Clement Featured Solutions +4 19 March 2026 Glidevale Protect Rolls Out Printed Roofing Membrane Guidance Featured Solutions +3 3 March 2026 Makita Launches Limited-Time XGT Battery Redemption Featured Solutions +5 26 February 2026 Precision Liquid Waterproofing Delivers Heritage Roof Refurbishment Sign Up to Roofing Today Stay up to date with all of the latest news from Roofing Today by signing up to our weekly Bulletins… Sign Up Today Get in Touch Check out the latest issue 123 March-April 2026 View Now Past Issues Get in Touch