{"product_id":"mendes-thermawood-berskire-grey-primed","title":"Mendes Thermawood Berskire Grey Primed Door","description":"\u003ch3\u003eMendes Thermawood Berkshire Grey Primed\u003c\/h3\u003e For a complete entrance solution, explore our \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/external-doors\"\u003eexternal doors\u003c\/a\u003e range alongside suitable \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/external-doors\"\u003eexterior doors\u003c\/a\u003e to find the right style for your project.\n\nThe Mendes Thermawood Berkshire Grey Primed external door is a high-performance solution that combines contemporary styling with outstanding thermal efficiency. Designed for modern homes, renovation projects, and new-build developments, this external door offers excellent insulation, exceptional durability, and a sleek horizontal groove design that enhances any property's exterior.\n\nSupplied grey primed in RAL 7038 as standard, the Berkshire is ready for its final topcoat, allowing you to customise the finish to suit your home's exterior colour scheme. The primed surface provides an ideal base for painting while reducing preparation time during installation.\n\n\u003ch3\u003eOutstanding Thermal Performance\u003c\/h3\u003e\n\nThe Thermawood Berkshire has been engineered to deliver impressive thermal efficiency, achieving U-values of approximately 1.32–1.36 W\/m²K. Its advanced insulated construction helps reduce heat loss, improve energy efficiency, and contribute to a more comfortable indoor environment throughout the year.\n\nIts innovative multi-layer construction includes an XPS foam insulation core, a structural LVL core with Meranti lippings, plywood outer layers, and an integrated 0.2mm aluminium reinforcement sheet. Together, these components create a robust, stable external door with a 45mm overall thickness, offering significantly greater strength and insulation than many traditional stile-and-rail doors.\n\n\u003ch3\u003eBuilt to Withstand the Elements\u003c\/h3\u003e\n\nDesigned for long-term external performance, the Thermawood Berkshire is engineered to cope with changing weather conditions. The insulated core and internal aluminium layer improve resistance to movement, twisting, and warping, helping the door retain its appearance and performance over time. In many installations, the door can also be fitted without requiring a porch, canopy, or recessed entrance, making it a practical choice for both front and rear entrances.\n\n\u003ch3\u003eModern Horizontal Design\u003c\/h3\u003e\n\nThe Berkshire features clean horizontal U-groove detailing on both faces of the door, creating a refined contemporary appearance that suits modern architecture while remaining versatile enough for renovation projects. The subtle grey primer provides a neutral finish that can easily be painted to complement virtually any exterior style.\n\n\u003ch3\u003eFlexible Installation\u003c\/h3\u003e\n\nOne of the standout advantages of the Mendes Thermawood Berkshire Grey Primed is its generous trimming allowance. The door can be trimmed by up to 25mm from all edges, making it an excellent choice for renovation projects, replacement doors, non-standard openings, and installations where on-site adjustments are required.\n\nThe Mendes Thermawood Berkshire Grey Primed is available in 1981 x 838 x 44mm and 2032 x 813 x 44mm, providing options to suit a variety of standard external door openings.\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e \u003cli\u003eHigh-performance thermally rated external door.\u003c\/li\u003e \u003cli\u003eExcellent thermal efficiency with U-values of approximately 1.32–1.36 W\/m²K.\u003c\/li\u003e \u003cli\u003e45mm insulated multi-layer construction.\u003c\/li\u003e \u003cli\u003eXPS foam insulated core for improved energy performance.\u003c\/li\u003e \u003cli\u003eIntegrated 0.2mm aluminium reinforcement for additional strength and stability.\u003c\/li\u003e \u003cli\u003eStructural LVL core with durable Meranti lippings.\u003c\/li\u003e \u003cli\u003eGrey primed finish (RAL 7038) ready for final topcoat.\u003c\/li\u003e \u003cli\u003eContemporary horizontal U-groove design on both faces.\u003c\/li\u003e \u003cli\u003eCan be trimmed by up to 25mm on all edges.\u003c\/li\u003e \u003cli\u003eSuitable for front and rear external door applications.\u003c\/li\u003e \u003cli\u003eBacked by a 10-year manufacturer's guarantee.\u003c\/li\u003e \u003cli\u003eAvailable in the following standard sizes: \u003cul\u003e \u003cli\u003e1981 x 838 x 44mm\u003c\/li\u003e \u003cli\u003e2032 x 813 x 44mm\u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat makes the Thermawood Berkshire energy efficient?\u003c\/h4\u003e\n\nThe door features an advanced insulated construction with an XPS foam core, structural LVL core, plywood outer layers, and an integrated aluminium reinforcement sheet. This combination delivers excellent thermal performance with U-values of approximately 1.32–1.36 W\/m²K, helping to reduce heat loss.\n\n\u003ch4\u003eCan the door be painted in a different colour?\u003c\/h4\u003e\n\nYes. The door is supplied grey primed in RAL 7038, providing the perfect base for your chosen exterior topcoat. This allows you to customise the finish to complement your property's style.\n\n\u003ch4\u003eWhat sizes are available?\u003c\/h4\u003e\n\nThe Mendes Thermawood Berkshire Grey Primed is available in 1981 x 838 x 44mm and 2032 x 813 x 44mm, making it suitable for a range of standard external door installations.","brand":"Mendes","offers":[{"title":"1981x838x44mm","offer_id":54905094799702,"sku":"176827","price":415.67,"currency_code":"GBP","in_stock":true},{"title":"2032x813x44mm","offer_id":54905094832470,"sku":"176828","price":415.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/mendes-thermawood-berskire-grey-primed-door-5557473.jpg?v=1786281818","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/mendes-thermawood-berskire-grey-primed","provider":"JJ Building Materials","version":"1.0","type":"link"}