[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"atspace-main-nav":3,"atspace-footer-navs":34,"page-\u002Fcase-studies\u002Fsbem-calculations-after-design-change-keeping-the-building-compliant-without-redesign":156},[4,14,18,22,26,30],{"id":5,"to":6,"icon":7,"items":8,"label":9,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"labelAdmin":12,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"e4efaec3-54a9-4eb0-8582-4fd8770e1545","\u002Fservices",null,false,"Services","_self",true,"Internal page link","link",{"id":15,"to":16,"icon":7,"items":8,"label":17,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"b361671f-6584-4af5-8fa0-5a26da73684c","\u002Fpartner-with-us","Partner with us",{"id":19,"to":20,"icon":7,"items":8,"label":21,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"b36e0f40-bf19-4620-bab9-25d45aefb3be","\u002Fabout","About",{"id":23,"to":24,"icon":7,"items":8,"label":25,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"0902954c-7220-4174-a771-dd28ed1e48f1","\u002Fcontact","Contact",{"id":27,"to":28,"icon":7,"items":8,"label":29,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"cd688c42-d7c7-4013-a38c-64be3f793377","\u002Fknowledge-hub","Knowledge hub",{"id":31,"to":32,"icon":7,"items":8,"label":33,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"d2c943ff-8768-4ef9-88a5-1ae6b912733d","\u002Fcareers","Careers",[35,50,83,96,133,142],[36,38,40,42,44,46],{"id":37,"to":16,"icon":7,"items":8,"label":17,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"7bc32343-19dd-4628-9f6f-d81dd41680a2",{"id":39,"to":20,"icon":7,"items":8,"label":21,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"61f29609-258e-4a1b-a81e-293d1039a1c4",{"id":41,"to":28,"icon":7,"items":8,"label":29,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"fb09cc92-9921-49bf-98ff-4b985b8c9baa",{"id":43,"to":24,"icon":7,"items":8,"label":25,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"b8b03433-8a13-485f-a874-4fe30a715494",{"id":45,"to":32,"icon":7,"items":8,"label":33,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"ea8625f5-96a7-4a86-b573-f25f299c6f08",{"id":47,"to":48,"icon":7,"items":8,"label":49,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"38a1e249-95df-4ddf-a862-691fd0e7a25f","\u002Fblog","Blog",[51,55,59,63,67,71,75,79],{"id":52,"to":53,"icon":7,"items":8,"label":54,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"ec519beb-33dd-4275-aa89-4b9acec78626","\u002Fservices\u002Fenergy-statements","Energy Statements",{"id":56,"to":57,"icon":7,"items":8,"label":58,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"a5bb7874-1b6a-430c-86d0-72b6ac222385","\u002Fservices\u002Fsap-calculations","SAP Calculations",{"id":60,"to":61,"icon":7,"items":8,"label":62,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"af14dfcd-3544-4a60-b6c0-dee218e214dd","\u002Fservices\u002Fsbem-calculations","SBEM Calculations",{"id":64,"to":65,"icon":7,"items":8,"label":66,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"0901f274-10a6-4d01-a09d-1b7e1db0d581","\u002Fservices\u002Fwater-efficiency-calculations","Water Efficiency Calculations",{"id":68,"to":69,"icon":7,"items":8,"label":70,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"512ca44b-ff3d-4a4e-b268-0dd1e8ac7122","\u002Fservices\u002Foverheating-assessments","Overheating Assessments",{"id":72,"to":73,"icon":7,"items":8,"label":74,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"8e33dd61-9f98-47db-8913-58a58b8431f2","\u002Fservices\u002Foverglazed-extension-calculations","Overglazed Extension Calculations",{"id":76,"to":77,"icon":7,"items":8,"label":78,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"56cbf8f1-560c-46ea-82dd-d2bc75350076","\u002Fservices\u002Fu-value-calculations","U-value Calculations",{"id":80,"to":81,"icon":7,"items":8,"label":82,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"2e407cc6-56cf-43f3-9584-3541adeff365","\u002Fservices\u002Fpsi-values","PSI Values",[84,88,92],{"id":85,"to":86,"icon":7,"items":8,"label":87,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"50e1c2d4-9067-4eee-81e2-40de42f9443b","\u002Fservices\u002Fdiagnostic-air-leakage-testing","Diagnostic Air Leakage Testing",{"id":89,"to":90,"icon":7,"items":8,"label":91,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"21279013-e0f2-4bd2-8f0d-8359f14af74e","\u002Fservices\u002Fpre-improvement-sound-insulation-testing","Pre-improvement Sound Insulation Testing",{"id":93,"to":94,"icon":7,"items":8,"label":95,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"f28856d9-bd52-4d8f-8934-c20a2df6f2a0","\u002Fservices\u002Fair-leakage-on-site-design-advice","Air Leakage On-site Design Advice",[97,101,105,109,113,117,121,125,129],{"id":98,"to":99,"icon":7,"items":8,"label":100,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"f9d3a9e3-e414-47e7-bb96-e2fb0c539231","\u002Fservices\u002Fresidential-air-leakage-testing","Residential Air Leakage Testing",{"id":102,"to":103,"icon":7,"items":8,"label":104,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"64a87166-10a8-42f9-99f3-dd8ad1a01c21","\u002Fservices\u002Fcommercial-air-leakage-testing","Commercial Air Leakage Testing",{"id":106,"to":107,"icon":7,"items":8,"label":108,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"e4399df9-c703-4daf-af96-511f4b932a56","\u002Fservices\u002Fsmoke-shaft-air-leakage-testing","Smoke Shaft Air Leakage Testing",{"id":110,"to":111,"icon":7,"items":8,"label":112,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"fac046b5-95e4-4683-9065-4f5631eca10c","\u002Fservices\u002Fsmart-htc","SmartHTC",{"id":114,"to":115,"icon":7,"items":8,"label":116,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"2b18d3e9-d191-4f55-8bf7-e5cbed8ba1a4","\u002Fservices\u002Fpassive-house-air-leakage-testing","Passive House Air Leakage Testing",{"id":118,"to":119,"icon":7,"items":8,"label":120,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"d5d9aba3-4fe3-4b5b-8c7b-fdda731bf96b","\u002Fservices\u002Fretrofit-air-leakage-testing","Retrofit Air Leakage Testing",{"id":122,"to":123,"icon":7,"items":8,"label":124,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"16f1de68-d8f9-4287-a377-9189fd9096b4","\u002Fservices\u002Fsound-insulation-testing","Sound Insulation Testing",{"id":126,"to":127,"icon":7,"items":8,"label":128,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"8edc23cb-d991-4cd7-8be3-05ac581623f2","\u002Fservices\u002Fventilation-flow-rate-testing","Ventilation Flow Rate Testing",{"id":130,"to":131,"icon":7,"items":8,"label":132,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"a499f916-be6d-417a-b74f-7d36840bf88d","\u002Fservices\u002Fbackground-ventilation-testing","Background Ventilation Testing",[134,138],{"id":135,"to":136,"icon":7,"items":8,"label":137,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"c729f2d1-c26a-4940-8bf6-31c57646a312","\u002Fservices\u002Fnew-build-conversion-domestic-epc-assessment","New Build\u002FConversion Domestic EPC Assessment",{"id":139,"to":140,"icon":7,"items":8,"label":141,"target":10,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"a3a30524-718e-4c56-9698-d61b39645487","\u002Fservices\u002Fnew-build-conversion-commercial-epc-assessment","New Build\u002FConversion Commercial EPC Assessment",[143,147,151],{"id":144,"to":145,"icon":7,"items":8,"label":146,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"622430f3-825d-4f59-a3b9-a0aecece4371","\u002Fterms-and-conditions","Terms & Conditions",{"id":148,"to":149,"icon":7,"items":8,"label":150,"target":10,"toggle":8,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"0d050c9f-d69f-4fd0-ac64-6ae522d5d3bf","\u002Fprivacy-policy","Privacy Policy",{"id":152,"to":153,"icon":7,"items":8,"label":154,"target":155,"toggle":11,"command":7,"to_page":7,"visible":11,"disabled":8,"is_button":8,"separator":8,"align_right":8,"logged_in_only":8,"display_variant":13,"not_logged_in_only":8},"66a0a788-fbc0-4843-9502-6049e1b80796","https:\u002F\u002Fatspace-ltd.s3.eu-west-2.amazonaws.com\u002Fuploads\u002Fatspace-trade-credit-application-form.pdf","Trade Application","_blank",{"data":157},{"id":158,"user_id":159,"parent_id":160,"page_type_id":161,"linked_page_id":7,"title":162,"slug":163,"full_url":164,"live":11,"data_model":165,"created_at":242,"updated_at":243,"is_homepage":8,"is_template":8,"parent":244,"seometa":252,"page_type":266,"page_type_values":293,"linked_page":7,"theme_styles":302},149,7,21,2,"SBEM Calculations After Design Change: Keeping the Building Compliant Without Redesign","sbem-calculations-after-design-change-keeping-the-building-compliant-without-redesign","\u002Fcase-studies\u002Fsbem-calculations-after-design-change-keeping-the-building-compliant-without-redesign",[166,224],{"name":167,"componentName":168,"cols":169,"colsMD":170,"customColSpan":8,"parentAlign":171,"bgImage":7,"inlineStyles":7,"bgColor":172,"group":173,"margin":7,"padding":7,"classes":174,"colSpan":7,"id":175,"originalModel":176,"borderWidth":216,"borderColor":217,"borderRadius":7,"paddingVertical":218,"blockTemplateId":219,"block_scope":220,"blockLabel":221,"blockDescription":7,"is_block":11,"paddingHorizontalSM":7,"paddingHorizontal":222,"sticky":8,"stickyTop":215,"stickyDisableSmall":8,"borderPosition":223},"Container","ColContainer","grid-cols-1","md:grid-cols-12","w-full","#ebf5f3","main","pattern_bg","f1bcde02-fe0a-4831-8ef7-833d9f4fbb17",[177],[178,184],{"colSpan":179,"colSpanSM":180,"colSpanMD":181,"colSpanLG":182,"customColSpan":8,"bgColor":7,"borderWidth":7,"borderColor":7,"borderRadius":7,"classes":7,"id":183,"borderPosition":7},"col-span-1","sm:col-span-12","md:col-span-12","lg:col-span-12","608d7c62-4a53-4ecd-90e5-9a4d00eaa4ad",{"name":185,"componentName":168,"nested":11,"cols":169,"colsMD":170,"customColSpan":8,"parentAlign":171,"bgImage":7,"inlineStyles":7,"bgColor":7,"group":186,"margin":7,"padding":7,"classes":7,"colSpan":7,"id":187,"originalModel":188,"borderWidth":7,"borderColor":7,"borderRadius":7,"containerWidth":214,"sticky":8,"stickyTop":215,"stickyDisableSmall":8,"borderPosition":7},"Nested Container","main_nested","877549aa-8bc7-474b-8261-ce43bdf39dfd",[189,205],[190,195],{"colSpan":179,"colSpanSM":191,"colSpanMD":192,"colSpanLG":193,"customColSpan":8,"bgColor":7,"borderWidth":7,"borderColor":7,"borderRadius":7,"classes":7,"id":194,"borderPosition":7},"sm:col-span-6","md:col-span-6","lg:col-span-6","f5aab5dd-4d72-423a-87fb-ae305112af49",{"name":196,"componentName":197,"group":198,"margin":7,"padding":7,"classes":7,"bgImage":7,"id":199,"originalModel":200},"WYSIWYG Editor","Wysiwyg","content","ee86e31b-348d-41ae-aea6-b0a20400b9d2",{"proseEnabled":8,"content":201,"lineHeightClass":202,"trackingClass":203,"spacingClass":204},"\u003Ch1 class=\"text-4xl md:text-5xl text-theme-dark-green font-medium mb-10 md:mb-0\" style=\"text-align: left;\">SBEM Calculations After Design Change: Keeping the Building Compliant Without Redesign\u003C\u002Fh1>","leading-relaxed","tracking-normal","[&_p]:my-0 [&_p+p]:mt-4",[206,208],{"id":207,"colSpan":179,"colSpanSM":191,"colSpanMD":192,"colSpanLG":193,"customColSpan":8,"bgColor":7,"borderWidth":7,"borderColor":7,"borderRadius":7,"classes":7,"borderPosition":7},"517a151c-2154-4782-b41c-3b767f63208b",{"name":209,"componentName":210,"group":198,"margin":7,"padding":7,"classes":7,"bgImage":7,"id":211,"originalModel":212},"HTML Block","HtmlBlock","8817ddf4-0530-4257-a85f-c50e6dae808f",{"html":213,"wrapperClasses":7,"contentClasses":7},"\u003Cdiv class=\"relative flex justify-center md:justify-end\">\n  \u003C!-- wrapper controls overall size -->\n  \u003Cdiv class=\"relative w-full max-w-[560px]\">\n    \u003C!-- Pattern layer -->\n    \u003Cdiv class=\"pattern-bg-case-study absolute -inset-6 rounded-2xl\" aria-hidden=\"true\">\u003C\u002Fdiv>\n\n    \u003C!-- Green slab (offset behind image) -->\n    \u003Cdiv\n      class=\"absolute left-0 top-6 h-[260px] w-[320px] rounded-2xl bg-emerald-500\"\n      aria-hidden=\"true\"\n    >\u003C\u002Fdiv>\n\n    \u003C!-- Image -->\n    \u003Cdiv class=\"relative ml-0 md:ml-10 mt-0 overflow-hidden rounded-2xl\">\n      \u003Cimg\n        src=\"{{feature_image}}\"\n        alt=\"Case study feature\"\n        class=\"block h-[260px] w-full object-cover\"\n      \u002F>\n    \u003C\u002Fdiv>\n  \u003C\u002Fdiv>\n\u003C\u002Fdiv>","max-w-6xl mx-auto",0,"border-2","05871b","py-16",12,"standard","Our Services - Green block with bg pattern","px-7","border-b",{"name":167,"componentName":168,"cols":169,"colsMD":170,"customColSpan":8,"parentAlign":171,"bgImage":7,"inlineStyles":7,"bgColor":7,"group":173,"margin":7,"padding":7,"classes":7,"colSpan":7,"id":225,"originalModel":226,"borderWidth":7,"borderColor":7,"borderRadius":7,"sticky":8,"stickyTop":215,"stickyDisableSmall":8,"paddingVertical":240,"borderPosition":7,"paddingHorizontal":241},"0634e860-5bb2-42de-aa57-b2272d325b7a",[227],[228,230],{"id":229,"colSpan":179,"colSpanSM":180,"colSpanMD":181,"colSpanLG":182,"customColSpan":8,"bgColor":7,"borderWidth":7,"borderColor":7,"borderRadius":7,"classes":7,"borderPosition":7},"769b7f36-06b0-4bcc-9fc7-b1935051d677",{"name":185,"componentName":168,"nested":11,"cols":169,"colsMD":170,"customColSpan":8,"parentAlign":171,"bgImage":7,"inlineStyles":7,"bgColor":7,"group":186,"margin":7,"padding":7,"classes":7,"colSpan":7,"id":231,"originalModel":232,"borderWidth":7,"borderColor":7,"borderRadius":7,"sticky":8,"stickyTop":215,"stickyDisableSmall":8,"containerWidth":214,"borderPosition":7},"e7c2eabd-f877-467a-89f0-aa8ef8b7f411",[233],[234,236],{"id":235,"colSpan":179,"colSpanSM":180,"colSpanMD":181,"colSpanLG":182,"customColSpan":8,"bgColor":7,"borderWidth":7,"borderColor":7,"borderRadius":7,"classes":7,"borderPosition":7},"c37da2da-dc4c-4238-938b-031fe5501f7d",{"name":196,"componentName":197,"group":198,"margin":7,"padding":7,"classes":7,"bgImage":7,"id":237,"originalModel":238},"30243da6-e294-4dbe-9226-f959bbb2a3d8",{"proseEnabled":11,"content":239,"lineHeightClass":202,"trackingClass":203,"spacingClass":204},"\u003Cdiv class=\"et_pb_column et_pb_column_2_3 et_pb_column_2_tb_body  et_pb_css_mix_blend_mode_passthrough\">\n\u003Cdiv class=\"et_pb_module et_pb_post_content et_pb_post_content_0_tb_body\">\n\u003Cdiv>\n\u003Ch2>\u003Cstrong>Overview\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>A late design change put a commercial building at risk of falling out of Part L compliance. The client needed a fast answer and wanted to avoid a redesign cycle that could disrupt the programme. ATSPACE updated the SBEM model, quantified the impact, and produced a short list of practical adjustments that recovered compliance \u003Cstrong>without altering the building form\u003C\u002Fstrong> or reopening the design.\u003C\u002Fp>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Project Snapshot\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Cp>\u003Cstrong>Service:\u003C\u002Fstrong> SBEM calculations and compliance recovery\u003Cbr>\u003Cstrong>Client:\u003C\u002Fstrong> Developer and principal contractor\u003Cbr>\u003Cstrong>Site:\u003C\u002Fstrong> Riverside Works, Unit 2, 27 Wharf Road, Nottingham NG2 3BR\u003Cbr>\u003Cstrong>Building type:\u003C\u002Fstrong> Commercial building with office and production support areas\u003Cbr>\u003Cstrong>Floor area:\u003C\u002Fstrong> Approx. 5,800 m²\u003Cbr>\u003Cstrong>Stage:\u003C\u002Fstrong> Late technical design → procurement\u003Cbr>\u003Cstrong>Design change:\u003C\u002Fstrong> Services and specification adjustment driven by procurement and coordination\u003Cbr>\u003Cstrong>Compliance driver:\u003C\u002Fstrong> Building Regulations Part L (non-domestic)\u003Cbr>\u003Cstrong>ATSPACE delivery:\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cul>\n\u003Cli>SBEM recalculation\u003C\u002Fli>\n\u003Cli>Compliance impact review\u003C\u002Fli>\n\u003Cli>Recovery options\u003C\u002Fli>\n\u003Cli>Updated outputs and evidence requirements\u003Cbr>\u003Cstrong>Team:\u003C\u002Fstrong> ATSPACE building performance engineer and compliance coordinator\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Why Design Changes Cause Compliance Problems\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Cp>Most design changes are sensible and unavoidable — driven by cost, lead times, coordination and maintenance access.\u003Cbr>However, some seemingly small adjustments can have a \u003Cstrong>major impact on SBEM outputs\u003C\u002Fstrong>, especially changes to:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>lighting efficacy and lighting controls\u003C\u002Fli>\n\u003Cli>HVAC efficiencies and control strategy\u003C\u002Fli>\n\u003Cli>ventilation fan power and heat recovery\u003C\u002Fli>\n\u003Cli>glazing performance and solar control\u003C\u002Fli>\n\u003Cli>setpoint schedules and zoning assumptions\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>On this project, the change affected a \u003Cstrong>high-impact variable\u003C\u002Fstrong>, so the SBEM model had to be updated immediately.\u003C\u002Fp>\n\u003Chr>\n\u003Ch1>\u003Cstrong>What ATSPACE Was Asked to Do\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Cp>The contractor needed clear, rapid support to:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>confirm whether the proposed change affected compliance\u003C\u002Fli>\n\u003Cli>update the SBEM model with revised inputs\u003C\u002Fli>\n\u003Cli>identify the specific element causing the risk\u003C\u002Fli>\n\u003Cli>recommend practical, low-disruption recovery measures\u003C\u002Fli>\n\u003Cli>avoid a redesign that would affect layouts or programme\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr>\n\u003Ch1>\u003Cstrong>What ATSPACE Did\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Ch2>\u003Cstrong>Step 1: Rapid SBEM Update\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>We applied the revised specification to the model and compared the outcome to the previously compliant position. This showed instantly whether the project had shifted out of compliance and by how much.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Step 2: Identify the Dominant Driver\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>Instead of presenting a broad list of possibilities, we isolated the \u003Cstrong>primary factor\u003C\u002Fstrong> affecting compliance. Common examples include:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>reduced lighting efficacy or poorer control performance\u003C\u002Fli>\n\u003Cli>plant efficiency reductions\u003C\u002Fli>\n\u003Cli>ventilation changes increasing fan energy or reducing heat recovery\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>Knowing the dominant driver avoids unnecessary changes elsewhere.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Step 3: Create a Practical Recovery Plan\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>We proposed measures that:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>avoid any change to building form\u003C\u002Fli>\n\u003Cli>fit within procurement and installation constraints\u003C\u002Fli>\n\u003Cli>are easy to evidence at as-built stage\u003C\u002Fli>\n\u003Cli>protect comfort and operational intent\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>Typical low‑disruption levers include:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>tightening lighting controls in key zones\u003C\u002Fli>\n\u003Cli>improving plant control or choosing a more efficient variant within the same system family\u003C\u002Fli>\n\u003Cli>refining zoning or schedule assumptions to match real operation\u003C\u002Fli>\n\u003Cli>adjusting ventilation inputs to remove unnecessary fan energy\u003C\u002Fli>\n\u003Cli>verifying glazing and solar control are delivered as designed\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>The focus was on \u003Cstrong>realistic, buildable changes\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Step 4: Issue Updated Outputs and Evidence Requirements\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>We supplied updated SBEM outputs plus a clear list of evidence requirements to ensure the recovered position was maintained through to completion.\u003C\u002Fp>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Issues Prevented\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Ch3>\u003Cstrong>1. Non‑Compliance Discovered at Completion\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Without an SBEM update, the project could have reached completion with a compliance failure — expensive and disruptive to fix late.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>2. Overreaction and Redesign\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Teams often jump straight to redesign, but targeted adjustments are usually sufficient.\u003Cbr>ATSPACE ensured the contractor stayed on programme without changing architectural elements.\u003C\u002Fp>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Outcome\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Cp>The building remained compliant with Part L \u003Cstrong>without redesign\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>Project outcomes:\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cul>\n\u003Cli>design change impacts identified quickly\u003C\u002Fli>\n\u003Cli>compliance recovered using targeted measures\u003C\u002Fli>\n\u003Cli>procurement and coordination progressed as planned\u003C\u002Fli>\n\u003Cli>clear evidence trail ensured compliance at as-built stage\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Common Mistakes This Project Avoided\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Cul>\n\u003Cli>approving design changes without checking SBEM impact\u003C\u002Fli>\n\u003Cli>discovering non-compliance at end stage\u003C\u002Fli>\n\u003Cli>applying broad changes instead of addressing the main driver\u003C\u002Fli>\n\u003Cli>relying on optimistic assumptions that cannot be evidenced\u003C\u002Fli>\n\u003Cli>redesigning unnecessarily when easier solutions exist\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Call to Action\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Cp>If a design change is putting your Part L position at risk, ATSPACE can:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>update SBEM rapidly\u003C\u002Fli>\n\u003Cli>explain the impact clearly\u003C\u002Fli>\n\u003Cli>provide practical recovery options\u003C\u002Fli>\n\u003Cli>give you updated outputs & evidence lists\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>\u003Cstrong>Ask for:\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cul>\n\u003Cli>SBEM recalculation after design or procurement change\u003C\u002Fli>\n\u003Cli>Compliance impact assessment and recovery options\u003C\u002Fli>\n\u003Cli>Updated SBEM outputs for sign-off\u003C\u002Fli>\n\u003Cli>Evidence requirements for as-built compliance\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Chr>\n\u003Ch1>\u003Cstrong>Frequently Asked Questions\u003C\u002Fstrong>\u003C\u002Fh1>\n\u003Ch3>\u003Cstrong>What changes affect SBEM compliance most?\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Typically:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>lighting performance and controls\u003C\u002Fli>\n\u003Cli>HVAC efficiencies and controls\u003C\u002Fli>\n\u003Cli>ventilation and fan power\u003C\u002Fli>\n\u003Cli>glazing and solar control\u003C\u002Fli>\n\u003Cli>zoning and scheduling assumptions\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch3>\u003Cstrong>Can compliance be recovered without redesign?\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Often yes — especially when the root cause is identified early and adjustments target the dominant driver.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>When should SBEM be updated after a proposed change?\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Immediately. Early checks provide more options and avoid late-stage disruption.\u003C\u002Fp>\n\u003C\u002Fdiv>\n\u003C\u002Fdiv>\n\u003C\u002Fdiv>","py-7","px-5","2026-03-31T09:43:41.000000Z","2026-03-31T11:35:13.000000Z",{"id":160,"user_id":245,"parent_id":7,"page_type_id":7,"linked_page_id":7,"title":246,"slug":247,"full_url":248,"live":11,"data_model":249,"created_at":250,"updated_at":250,"text_content_only":251,"html_content_only":251,"is_homepage":8,"is_template":8,"is_password_protected":8,"page_password":7,"parent":7},1,"Case Studies","case-studies","\u002Fcase-studies",[],"2026-02-04T16:38:09.000000Z","",{"id":253,"meta_title":162,"meta_description":254,"seoable_id":158,"seoable_type":255,"keyword_focus":251,"search_intent":7,"cornerstone_content":8,"canonical_url":256,"meta_robots":257,"og_title":162,"og_description":254,"og_image":258,"og_type":259,"og_url":7,"twitter_card":260,"twitter_title":162,"twitter_description":254,"twitter_image":258,"schema_markup":7,"extra_meta":7,"ai_field_locks":261,"insights":7,"serp_insights":7,"hreflang_alternates":7,"json_ld":7,"sitemap_changefreq":262,"sitemap_priority":263,"created_at":264,"updated_at":265},288,"A late design change threatened Part L compliance. ATSPACE updated SBEM fast, identified the impact and kept the project compliant without redesign.","Kabaddle\\PagesModule\\Models\\Page","https:\u002F\u002Fatspaceltd.co.uk\u002Fcase-studies\u002Fsbem-calculations-after-design-change-keeping-the-building-compliant-without-redesign","index,follow","https:\u002F\u002Fatspace-ltd.s3.eu-west-2.amazonaws.com\u002Fuploads\u002Fsite-image.png","website","summary",{"og_url":8,"og_type":8,"og_image":8,"og_title":8,"extra_meta":8,"meta_title":8,"meta_robots":8,"twitter_card":8,"canonical_url":8,"keyword_focus":8,"schema_markup":8,"twitter_image":8,"twitter_title":8,"og_description":8,"meta_description":8,"twitter_description":8},"monthly","0.5","2026-03-31T09:43:46.000000Z","2026-04-02T12:21:58.000000Z",{"id":161,"name":267,"slug":268,"description":7,"fields":269,"values":284},"Case Study","case-study",[270,279],{"id":271,"label":272,"handle":273,"type":274,"required":11,"instructions":7,"settings":275,"sort_order":215},8,"Feature Image","feature_image","image",{"min_width":276,"min_height":277,"crop_enabled":8,"resize_width":276,"resize_height":277,"resize_enabled":11,"resize_quality":278},600,300,85,{"id":280,"label":281,"handle":282,"type":282,"required":11,"instructions":7,"settings":283,"sort_order":245},9,"Tags","tags",{"min_width":7,"min_height":7,"crop_enabled":8,"resize_width":7,"resize_height":7,"resize_enabled":8,"resize_quality":278},{"feature_image":285,"tags":286},"https:\u002F\u002Fatspace-ltd.s3.eu-west-2.amazonaws.com\u002Fuploads\u002Fpages\u002Fsbemcalculationsafterdesignchangekeepingthebuildingcompliantwithoutredesig.jpeg",[287,289],{"id":288,"name":267,"slug":268},4,{"id":290,"name":291,"slug":292},23,"SBEM","sbem",[294,298],{"id":295,"page_id":158,"page_type_field_id":271,"value":285,"created_at":296,"updated_at":297},331,"2026-03-31T09:43:49.000000Z","2026-04-02T10:14:26.000000Z",{"id":299,"page_id":158,"page_type_field_id":280,"value":300,"created_at":296,"updated_at":301},332,[288,290],"2026-03-31T11:35:38.000000Z",{"version":303,"wrapper_attribute":304,"stylesheet_url":305,"layout_classes":306,"head_links":307,"wysiwyg_default_class_presets":316,"wysiwyg_class_presets":488,"wysiwyg_default_color_presets":508,"wysiwyg_color_presets":533},"1781598099-13ddca9f","data-site-theme-wrapper","https:\u002F\u002Fportal.atspaceltd.co.uk\u002Ftheme\u002Fsite.css","min-h-screen transition-colors duration-500 bg-[#f7f8fc] text-slate-900 bg-white",[308,311,313],{"rel":309,"href":310},"preconnect","https:\u002F\u002Ffonts.googleapis.com",{"rel":309,"href":312},"https:\u002F\u002Ffonts.gstatic.com",{"rel":314,"href":315},"stylesheet","https:\u002F\u002Ffonts.googleapis.com\u002Fcss2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=Roboto:ital,wght@0,100..900;1,100..900&display=swap",{"image":317,"text_size":332,"text_style":353,"line_height":374,"tracking":391,"spacing":411,"general":428},[318,320,323,326,329],{"label":319,"value":251},"Default (no extra classes)",{"label":321,"value":322},"Responsive – natural width","max-w-full h-auto",{"label":324,"value":325},"Responsive – full width","w-full h-auto",{"label":327,"value":328},"Rounded responsive","max-w-full h-auto rounded-lg",{"label":330,"value":331},"Shadowed responsive","max-w-full h-auto rounded-lg shadow-lg",[333,335,338,341,344,347,350],{"label":334,"value":251},"No size class",{"label":336,"value":337},"Heading XL (H1)","mt-0 pb-4 text-4xl md:text-5xl font-bold leading-tight",{"label":339,"value":340},"Heading Large (H2)","mt-0 pb-3 text-3xl md:text-4xl font-bold leading-tight",{"label":342,"value":343},"Heading Medium (H3)","mt-0 pb-3 text-2xl md:text-3xl font-semibold leading-snug",{"label":345,"value":346},"Paragraph Large","mt-0 pb-4 text-lg leading-relaxed",{"label":348,"value":349},"Paragraph Default","mt-0 pb-3 text-base leading-7",{"label":351,"value":352},"Paragraph Small","mt-0 pb-2 text-sm leading-6 text-slate-600",[354,356,359,362,365,368,371],{"label":355,"value":251},"No text style class",{"label":357,"value":358},"Page Title Style","mt-0 font-extrabold text-4xl md:text-5xl text-theme-dark-green leading-[1.2em]",{"label":360,"value":361},"Highlighter Mark","highlight-mark",{"label":363,"value":364},"Lead paragraph","lead",{"label":366,"value":367},"Small muted text","text-sm text-gray-500",{"label":369,"value":370},"Highlighted text","font-semibold text-emerald-700",{"label":372,"value":373},"Uppercase eyebrow","uppercase tracking-wide text-xs font-semibold text-slate-500",[375,377,380,383,386,388],{"label":376,"value":251},"No line-height class",{"label":378,"value":379},"Tight line height","leading-tight",{"label":381,"value":382},"Snug line height","leading-snug",{"label":384,"value":385},"Normal line height","leading-normal",{"label":387,"value":202},"Relaxed line height",{"label":389,"value":390},"Loose line height","leading-loose",[392,394,397,400,402,405,408],{"label":393,"value":251},"No tracking class",{"label":395,"value":396},"Tracking tighter","tracking-tighter",{"label":398,"value":399},"Tracking tight","tracking-tight",{"label":401,"value":203},"Tracking normal",{"label":403,"value":404},"Tracking wide","tracking-wide",{"label":406,"value":407},"Tracking wider","tracking-wider",{"label":409,"value":410},"Tracking widest","tracking-widest",[412,414,417,419,422,425],{"label":413,"value":251},"No spacing class",{"label":415,"value":416},"Paragraph spacing – tight","[&_p]:my-0 [&_p+p]:mt-2",{"label":418,"value":204},"Paragraph spacing – default",{"label":420,"value":421},"Paragraph spacing – comfortable","[&_p]:my-0 [&_p+p]:mt-6",{"label":423,"value":424},"Heading + paragraph rhythm","[&_h1]:mb-4 [&_h2]:mb-3 [&_h3]:mb-3 [&_h4]:mb-2 [&_p]:my-0 [&_p+p]:mt-4",{"label":426,"value":427},"Lists rhythm","[&_ul]:my-3 [&_ol]:my-3 [&_li+li]:mt-1",[429,431,434,437,440,443,446,449,452,455,458,461,464,467,470,473,476,479,482,485],{"label":430,"value":251},"No class",{"label":432,"value":433},"Opacity 100%","opacity-100",{"label":435,"value":436},"Opacity 90%","opacity-90",{"label":438,"value":439},"Opacity 75%","opacity-75",{"label":441,"value":442},"Opacity 50%","opacity-50",{"label":444,"value":445},"Opacity 30%","opacity-30",{"label":447,"value":448},"Margin bottom none","mb-0",{"label":450,"value":451},"Margin bottom small","mb-2",{"label":453,"value":454},"Margin bottom medium","mb-4",{"label":456,"value":457},"Margin bottom large","mb-6",{"label":459,"value":460},"Section title","section-title",{"label":462,"value":463},"Block quote","border-l-4 border-slate-300 pl-4 italic text-slate-700",{"label":465,"value":466},"Pull quote","my-6 rounded-xl border border-slate-200 bg-slate-50 p-6 text-xl leading-relaxed text-slate-800",{"label":468,"value":469},"Info callout","rounded-lg border border-sky-200 bg-sky-50 p-4 text-sky-900",{"label":471,"value":472},"Muted panel","rounded-lg bg-slate-100 p-4 text-slate-700",{"label":474,"value":475},"Lists: inherit text + marker colour","[&_ul]:text-inherit [&_ol]:text-inherit [&_li]:text-inherit [&_li::marker]:text-current",{"label":477,"value":478},"Lists: no indent","[&_ul]:pl-0 [&_ol]:pl-0 [&_ul]:ml-0 [&_ol]:ml-0",{"label":480,"value":481},"Lists: no indent (inside markers)","[&_ul]:pl-0 [&_ol]:pl-0 [&_ul]:ml-0 [&_ol]:ml-0 [&_ul]:list-inside [&_ol]:list-inside",{"label":483,"value":484},"Key facts list","list-disc space-y-2 pl-6 marker:text-slate-500",{"label":486,"value":487},"Code inline","rounded bg-slate-100 px-1.5 py-0.5 font-mono text-[0.9em] text-slate-800",{"image":489,"text_size":490,"text_style":491,"line_height":504,"tracking":505,"spacing":506,"general":507},[],[],[492,495,498,501],{"label":493,"value":494},"Default (inherit)","None",{"label":496,"value":497},"Sans serif","font-sans",{"label":499,"value":500},"Serfi","font-serif",{"label":502,"value":503},"Monospace","font-mono",[],[],[],[],[509,512,515,518,521,524,527,530],{"label":510,"value":511},"Body text","#1F2937",{"label":513,"value":514},"Muted text","#6B7280",{"label":516,"value":517},"Heading dark","#111827",{"label":519,"value":520},"Primary brand","#0284C7",{"label":522,"value":523},"Success","#059669",{"label":525,"value":526},"Warning","#D97706",{"label":528,"value":529},"Danger","#DC2626",{"label":531,"value":532},"White","#FFFFFF",[]]