{"id":365460,"date":"2025-09-17T11:59:16","date_gmt":"2025-09-17T10:59:16","guid":{"rendered":"https:\/\/detail-library.co.uk\/?p=365460"},"modified":"2025-09-18T17:09:41","modified_gmt":"2025-09-18T16:09:41","slug":"september-2025-new-details","status":"publish","type":"post","link":"https:\/\/detail-library.co.uk\/september-2025-new-details\/","title":{"rendered":"September 2025 &#8211; Timber Frame Extension Details"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;||12px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_post_title meta=&#8221;off&#8221; featured_image=&#8221;off&#8221; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_post_title][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><span style=\"font-weight: 400;\">This month we\u2019ve added a new series of details focused on <\/span><b>timber frame house extensions<\/b><span style=\"font-weight: 400;\">, offering practical solutions for a variety of boundary, floor, and wall junction conditions. These details have been developed to address common scenarios faced when designing extensions to existing buildings\u2014especially where retaining or upgrading existing construction needs to interface with new build elements.<\/span><\/p>\n<p>These details are featured in the new book House Extension Details by Aida Rodriguez Vega and Emma Walshaw.<\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/detail-library.co.uk\/wp-content\/uploads\/2025\/09\/Extension-Book-Blog-Post-Banner_02.png&#8221; alt=&#8221;Extension Book Blog Post Banner_02&#8243; title_text=&#8221;Extension Book Blog Post Banner_02&#8243; url=&#8221;https:\/\/first-in-architecture.myshopify.com\/pages\/house-extension-details&#8221; url_new_window=&#8221;on&#8221; align=&#8221;center&#8221; admin_label=&#8221;Banner Image&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;90%&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; custom_padding=&#8221;50px||||false|false&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<h3>Foundation and Floor Options for Timber Frame Extensions<\/h3>\n<p><span style=\"font-weight: 400;\">The new set includes multiple options for <\/span><b>ground floor construction<\/b><span style=\"font-weight: 400;\">, covering both <\/span><b>beam and block suspended floors <\/b><span style=\"font-weight: 400;\">and <\/span><b>solid floor slabs<\/b><span style=\"font-weight: 400;\">. You\u2019ll find variations including:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Trench fill foundations with beam and block floors<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Trench fill with RC slab<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Reinforced concrete raft foundations<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Each detail addresses insulation continuity, moisture protection, and includes structural considerations for packers, vents, and upstands. The goal is to minimise thermal bridging while ensuring robust and adaptable construction.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3>Party Wall and Boundary Conditions<\/h3>\n<p><span style=\"font-weight: 400;\">Designing extensions that connect to or near <\/span><b>party walls<\/b><span style=\"font-weight: 400;\"> introduces additional complexity. The new <\/span><b>EPTW series <\/b><span style=\"font-weight: 400;\">addresses this with a clear and well-annotated set of plan and section details showing:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Walls offset from the party line to allow for parapet overhang<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Details aligned with the existing face of masonry<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Corner conditions with options for brick and timber cladding returns<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Junctions with new cavity masonry party walls<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">We\u2019ve also included <\/span><b>thermal timber wall options<\/b><span style=\"font-weight: 400;\"> for situations where the party wall cannot be structurally relied on, such as <\/span><b>cantilevered RC slab options<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3>Refurbishment Interface Details<\/h3>\n<p><span style=\"font-weight: 400;\">Finally, the <\/span><b>EFTF series<\/b><span style=\"font-weight: 400;\"> explores how to tie new floors into existing buildings. These are often overlooked junctions that require thoughtful detailing, especially when connecting to existing <\/span><b>suspended timber floors<\/b><span style=\"font-weight: 400;\">. Options shown include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">New suspended timber floor to existing wall<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Beam and block floor with new timber structural wall<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">RC slab floor abutting existing suspended floor, with ventilated detail options<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Use and Adaptation<\/h3>\n<p><span style=\"font-weight: 400;\">As with all our details, these are intended as a guide to good practice and should be reviewed and adapted by your structural engineer and design team. Each drawing includes practical notes on insulation, moisture protection, and sequencing.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We hope this new set supports your design process when working with <\/span><b>extensions to existing homes<\/b><span style=\"font-weight: 400;\">, particularly in tight boundary conditions or where continuity with existing structures is key.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Explore the full set below.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;New Details&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;80px||||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>New Details<\/h2>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_3,1_3,1_3&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.16&#8243; 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These details have been developed to address common scenarios faced when designing extensions to existing buildings\u2014especially where retaining or upgrading existing construction needs to interface with new [&hellip;]<\/p>\n","protected":false},"author":1483,"featured_media":365473,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[72],"tags":[],"class_list":["post-365460","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-new-details"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>September 2025 - Timber Frame Extension Details<\/title>\n<meta name=\"description\" content=\"Timber Frame Extension Details ready to download and use in your own projects! Our membership offers free access to hundreds of construction details.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/detail-library.co.uk\/september-2025-new-details\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"September 2025 - Timber Frame Extension Details\" \/>\n<meta property=\"og:description\" content=\"Timber Frame Extension Details ready to download and use in your own projects! Our membership offers free access to hundreds of construction details.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/detail-library.co.uk\/september-2025-new-details\/\" \/>\n<meta property=\"og:site_name\" content=\"Detail Library\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-17T10:59:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-18T16:09:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/detail-library.co.uk\/wp-content\/uploads\/2025\/09\/09-Timber-Frame-Extension-Details-P1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2240\" \/>\n\t<meta property=\"og:image:height\" content=\"1260\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Axelle Fox\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Axelle Fox\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/\"},\"author\":{\"name\":\"Axelle Fox\",\"@id\":\"https:\/\/detail-library.co.uk\/#\/schema\/person\/8a6e57fc0452ca5d77088ed9ee259cce\"},\"headline\":\"September 2025 &#8211; Timber Frame Extension Details\",\"datePublished\":\"2025-09-17T10:59:16+00:00\",\"dateModified\":\"2025-09-18T16:09:41+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/\"},\"wordCount\":1743,\"publisher\":{\"@id\":\"https:\/\/detail-library.co.uk\/#organization\"},\"image\":{\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/detail-library.co.uk\/wp-content\/uploads\/2025\/09\/09-Timber-Frame-Extension-Details-P1.png\",\"articleSection\":[\"New Details\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/\",\"url\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/\",\"name\":\"September 2025 - Timber Frame Extension Details\",\"isPartOf\":{\"@id\":\"https:\/\/detail-library.co.uk\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/detail-library.co.uk\/september-2025-new-details\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/detail-library.co.uk\/wp-content\/uploads\/2025\/09\/09-Timber-Frame-Extension-Details-P1.png\",\"datePublished\":\"2025-09-17T10:59:16+00:00\",\"dateModified\":\"2025-09-18T16:09:41+00:00\",\"description\":\"Timber Frame Extension Details ready to download and use in your own projects! 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