[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"page-\u002Fcase-studies\u002Fairtightness-toolbox-talk-on-site-how-one-session-cut-air-leakage-snags-in-half":3,"atspace-footer-navs":382,"atspace-main-nav":515},{"data":4},{"id":5,"user_id":6,"parent_id":7,"page_type_id":8,"linked_page_id":9,"title":10,"slug":11,"full_url":12,"live":13,"data_model":14,"created_at":92,"updated_at":93,"is_homepage":20,"is_template":20,"parent":94,"seometa":102,"page_type":116,"page_type_values":142,"linked_page":9,"theme_styles":150},99,7,21,2,null,"Airtightness Toolbox Talk on Site: How One Session Cut Air Leakage Snags in Half","airtightness-toolbox-talk-on-site-how-one-session-cut-air-leakage-snags-in-half","\u002Fcase-studies\u002Fairtightness-toolbox-talk-on-site-how-one-session-cut-air-leakage-snags-in-half",true,[15,74],{"name":16,"componentName":17,"cols":18,"colsMD":19,"customColSpan":20,"parentAlign":21,"bgImage":9,"inlineStyles":9,"bgColor":22,"group":23,"margin":9,"padding":9,"classes":24,"colSpan":9,"id":25,"originalModel":26,"borderWidth":66,"borderColor":67,"borderRadius":9,"paddingVertical":68,"blockTemplateId":69,"block_scope":70,"blockLabel":71,"blockDescription":9,"is_block":13,"paddingHorizontalSM":9,"paddingHorizontal":72,"sticky":20,"stickyTop":65,"stickyDisableSmall":20,"borderPosition":73},"Container","ColContainer","grid-cols-1","md:grid-cols-12",false,"w-full","#ebf5f3","main","pattern_bg","f1bcde02-fe0a-4831-8ef7-833d9f4fbb17",[27],[28,34],{"colSpan":29,"colSpanSM":30,"colSpanMD":31,"colSpanLG":32,"customColSpan":20,"bgColor":9,"borderWidth":9,"borderColor":9,"borderRadius":9,"classes":9,"id":33,"borderPosition":9},"col-span-1","sm:col-span-12","md:col-span-12","lg:col-span-12","608d7c62-4a53-4ecd-90e5-9a4d00eaa4ad",{"name":35,"componentName":17,"nested":13,"cols":18,"colsMD":19,"customColSpan":20,"parentAlign":21,"bgImage":9,"inlineStyles":9,"bgColor":9,"group":36,"margin":9,"padding":9,"classes":9,"colSpan":9,"id":37,"originalModel":38,"borderWidth":9,"borderColor":9,"borderRadius":9,"containerWidth":64,"sticky":20,"stickyTop":65,"stickyDisableSmall":20,"borderPosition":9},"Nested Container","main_nested","877549aa-8bc7-474b-8261-ce43bdf39dfd",[39,55],[40,45],{"colSpan":29,"colSpanSM":41,"colSpanMD":42,"colSpanLG":43,"customColSpan":20,"bgColor":9,"borderWidth":9,"borderColor":9,"borderRadius":9,"classes":9,"id":44,"borderPosition":9},"sm:col-span-6","md:col-span-6","lg:col-span-6","f5aab5dd-4d72-423a-87fb-ae305112af49",{"name":46,"componentName":47,"group":48,"margin":9,"padding":9,"classes":9,"bgImage":9,"id":49,"originalModel":50},"WYSIWYG Editor","Wysiwyg","content","ee86e31b-348d-41ae-aea6-b0a20400b9d2",{"proseEnabled":20,"content":51,"lineHeightClass":52,"trackingClass":53,"spacingClass":54},"\u003Ch1 class=\"text-4xl md:text-5xl text-theme-dark-green font-medium mb-10 md:mb-0\" style=\"text-align: left;\">Air Tightness Toolbox Talk on Site: How One Session Cut Air Leakage Snags in Half\u003C\u002Fh1>","leading-relaxed","tracking-normal","[&_p]:my-0 [&_p+p]:mt-4",[56,58],{"id":57,"colSpan":29,"colSpanSM":41,"colSpanMD":42,"colSpanLG":43,"customColSpan":20,"bgColor":9,"borderWidth":9,"borderColor":9,"borderRadius":9,"classes":9,"borderPosition":9},"517a151c-2154-4782-b41c-3b767f63208b",{"name":59,"componentName":60,"group":48,"margin":9,"padding":9,"classes":9,"bgImage":9,"id":61,"originalModel":62},"HTML Block","HtmlBlock","8817ddf4-0530-4257-a85f-c50e6dae808f",{"html":63,"wrapperClasses":9,"contentClasses":9},"\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":16,"componentName":17,"cols":18,"colsMD":19,"customColSpan":20,"parentAlign":21,"bgImage":9,"inlineStyles":9,"bgColor":9,"group":23,"margin":9,"padding":9,"classes":9,"colSpan":9,"id":75,"originalModel":76,"borderWidth":9,"borderColor":9,"borderRadius":9,"sticky":20,"stickyTop":65,"stickyDisableSmall":20,"paddingVertical":90,"borderPosition":9,"paddingHorizontal":91},"0634e860-5bb2-42de-aa57-b2272d325b7a",[77],[78,80],{"id":79,"colSpan":29,"colSpanSM":30,"colSpanMD":31,"colSpanLG":32,"customColSpan":20,"bgColor":9,"borderWidth":9,"borderColor":9,"borderRadius":9,"classes":9,"borderPosition":9},"769b7f36-06b0-4bcc-9fc7-b1935051d677",{"name":35,"componentName":17,"nested":13,"cols":18,"colsMD":19,"customColSpan":20,"parentAlign":21,"bgImage":9,"inlineStyles":9,"bgColor":9,"group":36,"margin":9,"padding":9,"classes":9,"colSpan":9,"id":81,"originalModel":82,"borderWidth":9,"borderColor":9,"borderRadius":9,"sticky":20,"stickyTop":65,"stickyDisableSmall":20,"containerWidth":64,"borderPosition":9},"e7c2eabd-f877-467a-89f0-aa8ef8b7f411",[83],[84,86],{"id":85,"colSpan":29,"colSpanSM":30,"colSpanMD":31,"colSpanLG":32,"customColSpan":20,"bgColor":9,"borderWidth":9,"borderColor":9,"borderRadius":9,"classes":9,"borderPosition":9},"c37da2da-dc4c-4238-938b-031fe5501f7d",{"name":46,"componentName":47,"group":48,"margin":9,"padding":9,"classes":9,"bgImage":9,"id":87,"originalModel":88},"30243da6-e294-4dbe-9226-f959bbb2a3d8",{"proseEnabled":13,"content":89,"lineHeightClass":52,"trackingClass":53,"spacingClass":54},"\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>The Result\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>A single ATSPACE airtightness toolbox talk, delivered directly to the trades doing the work, cut air leakage snags by half on a live residential site. The improvement came from making airtightness practical, visual and repeatable, with clear ownership of the junctions that normally cause failures.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Project Snapshot\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>\u003Cstrong>Service:\u003C\u002Fstrong> Air leakage on‑site design advice\u003Cbr>\u003Cstrong>Client:\u003C\u002Fstrong> Main contractor delivering mixed‑tenure housing\u003Cbr>\u003Cstrong>Site:\u003C\u002Fstrong> Riverside View, Barton Lane, Nottingham NG2\u003Cbr>\u003Cstrong>Scale:\u003C\u002Fstrong> 64 plots across two phases\u003Cbr>\u003Cstrong>Build type:\u003C\u002Fstrong> Masonry cavity walls with mixed roof forms\u003Cbr>\u003Cstrong>Programme stage:\u003C\u002Fstrong> Phase one entering second fix\u003Cbr>\u003Cstrong>Compliance driver:\u003C\u002Fstrong> Approved Document Part L\u003Cbr>\u003Cstrong>ATSPACE delivery:\u003C\u002Fstrong> Airtightness toolbox talk, detail guidance, follow‑up spot checks\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Why the Client Requested a Toolbox Talk\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>The site was not failing every test — the problem was \u003Cstrong>inconsistency and repeat snags\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Cp>Two expensive patterns had emerged:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Airtightness snags were found late, often after finishes restricted access\u003C\u002Fli>\n\u003Cli>The same snag types were appearing plot after plot\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>A toolbox talk made commercial sense because it stopped repeat defects before they became part of the build.\u003C\u002Fp>\n\u003Cp>The client wanted:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Fewer snags per plot\u003C\u002Fli>\n\u003Cli>Higher first‑time pass rates\u003C\u002Fli>\n\u003Cli>Less rework behind kitchens and bathrooms\u003C\u002Fli>\n\u003Cli>Clearer trade ownership of airtightness interfaces\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>The Real Causes of Repeated Airtightness Snags\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>Most housing sites struggle for four reasons:\u003C\u002Fp>\n\u003Col>\n\u003Cli>Airtightness is treated as a \u003Cem>test event\u003C\u002Fem>, not a build discipline\u003C\u002Fli>\n\u003Cli>Trades only see \u003Cem>their\u003C\u002Fem> detail, not the airtightness line across interfaces\u003C\u002Fli>\n\u003Cli>Small layout or service changes creep in plot to plot\u003C\u002Fli>\n\u003Cli>Everyone assumes someone else will “seal it later”\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Cp>A toolbox talk works when it changes behaviour — not just knowledge.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>What ATSPACE Delivered\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Ch3>\u003Cstrong>1. Trade‑focused toolbox talk based on real site details\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Delivered on site, using real junctions from that exact house type.\u003C\u002Fp>\n\u003Cp>Covered:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>What airtightness \u003Cem>actually is\u003C\u002Fem> in practice\u003C\u002Fli>\n\u003Cli>Why Part L airtightness matters to programme and cost\u003C\u002Fli>\n\u003Cli>The most common leakage routes on this site\u003C\u002Fli>\n\u003Cli>What “good” looks like at key junctions\u003C\u002Fli>\n\u003Cli>Who owns each interface\u003C\u002Fli>\n\u003Cli>Simple readiness checks before test booking\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch3>\u003Cstrong>2. Site‑specific snag patterns and fixes\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>We focused on the snags the site was repeatedly seeing.\u003C\u002Fp>\n\u003Cp>Typical issues addressed:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Gaps behind meter cupboards and incoming services\u003C\u002Fli>\n\u003Cli>Leaks behind kitchens and utility zones\u003C\u002Fli>\n\u003Cli>Poor sealing at soil stack penetrations\u003C\u002Fli>\n\u003Cli>Boxing hiding gaps instead of sealing them\u003C\u002Fli>\n\u003Cli>Loft hatch seals with poor compression\u003C\u002Fli>\n\u003Cli>Drylining edges not forming a continuous airtight layer\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>We then demonstrated the practical fixes.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>3. Simple rules that stopped repeat defects\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>The biggest improvements came from process clarity, not materials.\u003C\u002Fp>\n\u003Cp>Rules introduced on site:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>No boxing closed until the seal \u003Cem>behind\u003C\u002Fem> is complete\u003C\u002Fli>\n\u003Cli>Any new penetration requires immediate reseal + sign‑off\u003C\u002Fli>\n\u003Cli>Meter cupboard close‑out checked before second fix completion\u003C\u002Fli>\n\u003Cli>Loft hatch seal compression physically checked before test booking\u003C\u002Fli>\n\u003Cli>Wet room penetrations sealed before sanitaryware limits access\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>Short. Memorable. Enforceable.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>4. Follow‑up spot checks to maintain consistency\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>Toolbox talks fail when treated as one‑off events.\u003C\u002Fp>\n\u003Cp>We returned for spot checks, reinforcing the standards on real plots as different crews moved through the work.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>The Problems Faced and What Changed\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Ch3>\u003Cstrong>Problem 1: Airtightness not owned across interfaces\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>\u003Cstrong>Fix:\u003C\u002Fstrong> Assign responsibility per junction, not per trade.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Problem 2: Snags identified too late\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>\u003Cstrong>Fix:\u003C\u002Fstrong> Move airtightness checks earlier into readiness routines.\u003C\u002Fp>\n\u003Ch3>\u003Cstrong>Problem 3: Repeat snags plot to plot\u003C\u002Fstrong>\u003C\u002Fh3>\n\u003Cp>\u003Cstrong>Fix:\u003C\u002Fstrong> Standardisation — once a pattern appears, check the next plots proactively.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>Results\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>In the next testing cycle, the site recorded a clear improvement.\u003C\u002Fp>\n\u003Cp>Measured improvements (verified by spot checks):\u003C\u002Fp>\n\u003Cul>\n\u003Cli>~50% fewer air leakage snags per plot\u003C\u002Fli>\n\u003Cli>Faster readiness sign‑off for air testing\u003C\u002Fli>\n\u003Cli>Fewer late access issues behind finished areas\u003C\u002Fli>\n\u003Cli>Better consistency across crews and house types\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cp>The site stopped repeating the same mistakes.\u003C\u002Fp>\n\u003Ch2>\u003Cstrong>What This Proves\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>Airtightness improves fastest when trades understand:\u003C\u002Fp>\n\u003Col>\n\u003Cli>\u003Cstrong>What\u003C\u002Fstrong> airtightness looks like at the junction they’re building\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Why\u003C\u002Fstrong> it matters to programme and cost\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Cp>A toolbox talk works when it is:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>practical\u003C\u002Fli>\n\u003Cli>site‑specific\u003C\u002Fli>\n\u003Cli>reinforced with follow‑up\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>Common Mistakes the Site Avoided After the Talk\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cul>\n\u003Cli>Treating airtightness as “the tester’s problem”\u003C\u002Fli>\n\u003Cli>Allowing penetrations without controlled close‑out\u003C\u002Fli>\n\u003Cli>Assuming visible sealant equals airtightness\u003C\u002Fli>\n\u003Cli>Leaving meter cupboards until the end\u003C\u002Fli>\n\u003Cli>Booking air tests before plots were genuinely ready\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>CTA\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>If your site is seeing repeated air leakage snags, inconsistent results or too many retests, an ATSPACE airtightness toolbox talk can quickly tighten performance.\u003C\u002Fp>\n\u003Cp>Ask for:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>Site‑based airtightness toolbox talks\u003C\u002Fli>\n\u003Cli>Trade‑focused detail guidance using \u003Cem>your\u003C\u002Fem> house types\u003C\u002Fli>\n\u003Cli>Follow‑up spot checks to maintain standards\u003C\u002Fli>\n\u003Cli>Support to reduce snags and improve first‑time pass rates\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cstrong>Frequently Asked Questions\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp>\u003Cstrong>What is an airtightness toolbox talk?\u003C\u002Fstrong>\u003Cbr>A short, site‑based session showing trades what airtightness looks like on their build and how to avoid the snags that cause failures.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>Who should attend?\u003C\u002Fstrong>\u003Cbr>Anyone creating or closing penetrations: drylining, M&E, carpentry, plumbing, site supervisors.\u003C\u002Fp>\n\u003Cp>\u003Cstrong>How can one session reduce snags so quickly?\u003C\u002Fstrong>\u003Cbr>Because most snags repeat — once trades 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