--- slug: whats-new summary: "A running record of recent additions and revisions to The Circular Built Environment." --- # What's New Recent changes to The Circular Built Environment. ## 2026-06-25 ### What's New - **New article:** [Design for Maintenance and Repair](maintenance-repair.md) — making building components accessible, serviceable, and replaceable in place so parts get repaired and upgraded instead of triggering a premature strip-out. - **New article:** [Reuse Insurability and Warranty Pathway](reuse-insurability-warranty.md) — how a tested, documented reclaimed component earns a defensible warranty and gets accepted by the insurers who price the next project's risk. - **New article:** [Biogenic Carbon Accounting](biogenic-carbon-accounting.md) — how the carbon stored in timber and bio-based buildings is counted, and why two competent assessors can reach different footprints for the same timber building. - **Improved:** [Disassembly Potential Measurement](disassembly-potential-measurement.md) — tighter caveats on early-design uncertainty. - **Structural:** The Foundations, Material Passports, and Urban Mining section landing pages now list every entry in the section, so readers entering a section cold get a complete map. ### Metrics - Total articles: 74 - Coverage: 74 of 75 proposed concepts written (99%) - Articles edited since last checkpoint: 3 ## 2026-06-20 ### What's New - **New article:** [Disassembly Potential Measurement](disassembly-potential-measurement.md) — how to score whether designed-for-disassembly components can actually come apart without value loss. - **New article:** [Component Reuse Potential Assessment](reuse-potential-assessment.md) — how to grade audited building components before inventory turns into unsupported reuse claims or low-value recovery. - **New article:** [Reused Precast Concrete Elements](precast-element-reuse.md) — how to recover precast slabs, beams, columns, and panels as components before crushing collapses them into aggregate. - **Improved:** [Circular Fit-Out](circular-fit-out.md) — tighter opening and clearer retention, procurement, and strip-out language. - **Improved:** [EU Circular Economy Act (2026)](circular-economy-act.md) — sharper timing language, current Commission circularity-rate framing, and a stronger source trail for the April 2026 consultation stage. ### Metrics - Total articles: 71 - Coverage: 71 of 72 proposed concepts written (99%) - Articles edited since last checkpoint: 2 ## 2026-06-20 ### What's New - **New article:** [EU Circular Economy Act (2026)](circular-economy-act.md) — the forthcoming EU policy file that could shape secondary-material markets, circular procurement, product evidence, and construction circularity infrastructure. - **New article:** [Circular Fit-Out](circular-fit-out.md) — how to keep short-life interiors useful across tenant, workplace, and retail refresh cycles. - **Improved:** [Product Circularity Data Sheet (PCDS)](circularity-data-sheet.md) — clearer distinctions from DPPs and material passports, with source-aligned language about how PCDS data feeds both. ### Metrics - Total articles: 68 - Coverage: 68 of 69 proposed concepts written (99%) - Articles edited since last checkpoint: 1 ## 2026-06-18 ### What's New - **New article:** [EU Taxonomy Circular-Economy Criteria for Buildings](eu-taxonomy-criteria.md) — the screening rules that decide whether a construction, renovation, or demolition activity counts as a circular substantial contribution in a sustainable-finance file. - **New article:** [EN 18177 Circular Economy in the Construction Sector](en-18177-framework.md) — the draft European framework standard that defines what circularity means for buildings and how it sits above the disassembly, product-declaration, and assessment standards. - **New article:** [Product Circularity Data Sheet (PCDS)](circularity-data-sheet.md) — the ISO 59040 standardized, machine-readable format for declaring a product's circularity statements, and how it differs from a digital product passport and a material passport. - **Improved:** [Environmental Product Declaration (EPD) for Construction Products](environmental-product-declaration.md) — tighter, more natural prose. - **Improved:** [EU Taxonomy Circular-Economy Criteria for Buildings](eu-taxonomy-criteria.md) — tightened for prose quality. - **Improved:** [EN 18177 Circular Economy in the Construction Sector](en-18177-framework.md) — polished for prose clarity. - **Structural:** Tightened the cross-links in the Design for Disassembly and Reversibility section so ISO 20887 and the Disassembly-in-Theory antipattern now point back to every connection and sequencing pattern that addresses them. ### Metrics - Total articles: 66 - Coverage: 66 of 66 proposed concepts written (100%) - Articles edited since last checkpoint: 3 ## 2026-06-16 ### What's New - **New article:** [End-of-Waste Status for Reclaimed Construction Materials](waste-exit-status.md) — the legal boundary that lets recovered construction material leave waste controls and re-enter specification without turning that status into a circularity badge. - **New article:** [Environmental Product Declaration (EPD) for Construction Products](environmental-product-declaration.md) — how verified product-impact declarations support carbon, certification, procurement, and passport evidence without proving circularity. - **Improved:** [End-of-Waste Status for Reclaimed Construction Materials](waste-exit-status.md) — clearer legal-status boundaries and a more specific note on EU criteria development for construction and demolition waste. - **Improved:** [Circular Economy Statement](circular-economy-statement.md) — clearer approval-stage, quantified-template, and post-construction monitoring language. - **Improved:** [Material Stock Analysis (MSA)](material-stock-analysis.md) — clearer supply timing, source-quality, and planning language for city, portfolio, and marketplace use. - **Improved:** [Reverse Logistics for Building Components](reverse-logistics.md) — clearer timing-mismatch, storage-node, and direct-versus-buffered routing choices. ### Metrics - Total articles: 63 - Coverage: 63 of 65 proposed concepts written (97%) - Articles edited since last checkpoint: 4 ## 2026-06-15 ### What's New - **New article:** [Reverse Logistics for Building Components](reverse-logistics.md) — how to design the collection, transport, storage, grading, and matching chain that turns a reuse audit into actual recoveries before demolition speed strands the components. - **New article:** [Manufacturer Take-Back Scheme for Building Products](manufacturer-take-back.md) — how to bind the original supplier to reclaim carpet tile, ceiling grid, glazing, and aluminum at strip-out for reuse or remanufacture instead of waste. - **Improved:** [Circular Procurement for Buildings](circular-procurement-buildings.md) — tighter prose and sharper rhythm in the procurement-document discussion. - **Improved:** [Building Circularity Metrics](building-circularity-metrics.md) — clearer, more skimmable prose in the open-questions discussion. - **Improved:** [Circular Construction Hub](circular-construction-hub.md) — tighter, clearer prose in the Context section. - **Improved:** [Circular Economy Statement](circular-economy-statement.md) — clearer sentences and a scannable checklist of what a serious statement contains. - **Improved:** [Digital Building Logbook (DBL)](digital-building-logbook.md) — sharper questions and plainer phrasing on why a governed building-data record matters. ### Metrics - Total articles: 61 - Coverage: 61 of 63 proposed concepts written (97%) - Articles edited since last checkpoint: 6 ## 2026-06-14 ### What's New - **New article:** [Building Circularity Metrics](building-circularity-metrics.md) — how to read circularity scores without mistaking a single index for proof of low carbon, future reuse, or full circular performance. - **New article:** [Digital Building Logbook (DBL)](digital-building-logbook.md) — how governed building-data records connect passports, energy evidence, renovation history, access rights, and recovery planning across the asset life cycle. - **New article:** [Material Stock Analysis (MSA)](material-stock-analysis.md) — how cities, owners, and reuse operators estimate embedded building materials before recovery work reaches the demolition gate. - **New article:** [Circular Procurement for Buildings](circular-procurement-buildings.md) — how to turn reuse, recovery, lifecycle cost, supplier engagement, and product evidence into brief, tender, budget, and contract requirements. - **New article:** [Circular Construction Hub](circular-construction-hub.md) — how regional reuse hubs connect audits, storage, digital listings, logistics, buyer demand, and finance. ### Metrics - Total articles: 58 - Coverage: 58 of 62 proposed concepts written (94%) - Articles edited since last checkpoint: 0 ## 2026-06-09 ### What's New - **New article:** [Cradle to Cradle Certified Product Standard](cradle-cradle-standard.md) — how to read a C2C tier on a product datasheet, what its five categories score, and where the certification stops short of a building-level claim. - **New article:** [RICS Whole Life Carbon Assessment (WLCA) Standard](rics-wlca-standard.md) — the professional method that turns whole-life carbon into a number quantity surveyors and lenders will accept, and the standards layer that makes circular-construction carbon savings auditable. - **New article:** [IFC Harmonized Circular Economy Finance Guidelines (2025)](ifc-circular-guidelines.md) — how the new IFC-led classification decides when a transaction counts as circular-economy finance, with built-environment examples. - **Improved:** [Reused Structural Steel](reused-structural-steel.md) — a clearer opening and a sharper explanation of how member identity, removal discipline, and evidence keep steel in product-level reuse. - **Improved:** [Salvaged Building Components Marketplace](salvaged-components-marketplace.md) — the four marketplace functions now read as a clean list and the prose is tighter. ### Metrics - Total articles: 53 - Coverage: 53 of 53 proposed concepts written (100%) - Articles edited since last checkpoint: 4 ## 2026-06-07 ### What's New - **Improved:** [Façade-as-a-Service](facade-service.md) — a clearer opening and tighter prose through the contract-governance and TU Delft pilot sections. - **Improved:** [Disassembly-in-Theory](disassembly-theory.md) — polished for sharper, plainer prose. - **Improved:** [Downcycling-as-Circularity](downcycling-circularity.md) — a clearer opening that shows, in one familiar scene, why a high recovery rate is not the same as keeping material in use. - **Improved:** [Green Bonds for Circular Construction](circular-construction-bonds.md) — tightened for sharper rhythm and fewer hedges. - **Improved:** [Adaptive-Reuse Feasibility Triage](adaptive-reuse-triage.md) — sharper rhythm and easier skimming, with no change to its guidance. - **Improved:** [Sustainability-Linked Loans for Real Estate Decarbonization](sustainability-linked-loans.md) — tightened for more natural prose without changing its guidance. - **Improved:** [Recycled Concrete Aggregate (RCA) — and Its Limits](recycled-concrete-aggregate.md) — a sharper opening on RCA's overclaiming risk and a cleaner statement of which contaminants disqualify a clean concrete stream. - **Improved:** [Pre-Demolition Material Audit](predemolition-material-audit.md) — a tighter, sharper opening. - **Improved:** [Specifying Around the Reused-Steel CE-Marking Bottleneck](reused-steel-bottleneck.md) — two dense paragraphs split and the compliance-route checklist reshaped for sharper reading. ### Metrics - Total articles: 50 - Coverage: 50 of 53 proposed concepts written (94%) - Articles edited since last checkpoint: 9 ## 2026-05-27 ### What's New - **Improved:** [Butterfly Diagram (Technical and Biological Cycles)](butterfly-diagram.md) — a cleaner vocabulary structure that separates technical and biological circular routes, clarifies common category errors, and gives building teams a sharper route test for circular claims. - **Improved:** [R-Strategies (R0–R9 / 9R Framework)](nine-r-framework.md) — a cleaner vocabulary structure that separates avoided demand, value-retention loops, and residual recovery so circular project claims can be ranked more precisely. - **Improved:** [Linear Construction (the "Take-Make-Demolish" Baseline)](take-make-demolish.md) — a cleaner vocabulary structure that names the take-make-demolish baseline, shows how to recognize it in briefs and contracts, and separates waste diversion from higher-value circular routes. - **Improved:** [Embodied Carbon (vs Operational Carbon)](embodied-operational-carbon.md) — a cleaner vocabulary structure that separates material-side emissions from operating emissions, clarifies life-cycle boundaries, and gives circular project teams a sharper test for carbon claims. - **Improved:** [Whole-Life Carbon Assessment](whole-life-carbon.md) — a cleaner vocabulary structure that separates the assessment boundary, module language, project examples, and caveats around future scenarios and Module D. - **Improved:** [Buildings as Material Banks (BAMB)](buildings-material-banks.md) — a cleaner vocabulary structure that separates stored physical, evidence, and market value from the records and recovery conditions needed to make a material-bank claim real. - **Improved:** [Material Passport](material-passport.md) — a cleaner vocabulary structure that separates material identity, data layers, recovery routes, and evidence limits from project-specific reuse advice. - **Improved:** [Digital Product Passport (DPP) for Construction Products](construction-product-passport.md) — a cleaner vocabulary structure that separates product-level regulatory evidence from material passports, building resource passports, and recoverability claims. - **Improved:** [Building Resource Passport (BRP)](building-resource-passport.md) — a cleaner vocabulary structure that separates the asset-level record, data-quality signals, DGNB/Madaster evidence, and limits around valuation and recoverability. - **Improved:** [Long Life, Loose Fit](long-life-loose.md) — a cleaner vocabulary structure that explains the phrase's RIBA-era origin, names the design capacities behind loose fit, and separates adaptable-building recognition from project-specific advice. - **Improved:** [Shearing Layers (Six S's)](shearing-layers.md) — a cleaner vocabulary structure that explains the six S's, shows how to recognize layer-aware design, and separates layer timing from project-specific advice. - **Improved:** [Hempcrete and Bio-Based Wall Systems](hempcrete-bio-walls.md) — a cleaner vocabulary structure that separates hemp-lime material identity, moisture and code evidence, carbon limits, and end-of-life routes from project-specific advice. - **Improved:** [Mycelium Composites in Construction](mycelium-composites.md) — a cleaner vocabulary structure that separates grown-material identity, product evidence, performance limits, and circularity claims from project-specific advice. - **Improved:** [Cross-Laminated Timber (CLT) and Mass Timber](clt-mass-timber.md) — a cleaner vocabulary structure that separates timber product identity, reuse evidence, carbon limits, and secondary-timber routes from project-specific advice. - **Improved:** [Bankability Gap (Circular Construction Finance)](circular-finance-bankability.md) — a cleaner vocabulary structure that separates circular value from underwritable evidence, clarifies the five evidence gaps, and gives finance, design, and construction teams a sharper test for circular claims. - **Improved:** [BREEAM Circularity Credits](breeam-circularity-credits.md) — a clearer vocabulary structure that separates BREEAM evidence routes, credit-family limits, and circularity overclaim risks from project-specific certification advice. - **Improved:** [DGNB Circular-Building Module and Building Resource Passport](dgnb-circular-module.md) — a clearer vocabulary structure that separates DGNB resource-passport evidence, circularity indices, and data-quality limits from project-specific certification advice. - **Improved:** [EU Level(s) Framework](eu-levels-framework.md) — a clearer vocabulary structure that separates the EU indicator framework, circularity signals, reporting stages, and certification or finance limits from project-specific advice. - **Improved:** [ISO 20887 Design for Disassembly and Adaptability](iso-20887.md) — a clearer vocabulary structure that separates the standard's disassembly and adaptability principles from project-specific design, certification, finance, or compliance advice. - **Improved:** [LEED v5 Circularity Treatment](leed-v5-circularity.md) — a clearer vocabulary structure that separates rating-system evidence from project-specific certification, procurement, finance, or recovery advice. - **Improved:** [Pre-Demolition Audit (Mandated)](mandated-predemolition-audit.md) — reframed as a regulatory vocabulary entry that explains the permit-stage audit requirement, how to recognize it, and where it can still fail. - **Improved:** [Revised EU Construction Products Regulation (CPR) Effective 2026](revised-cpr-2026.md) — reframed as regulatory vocabulary that separates product-market evidence from project-level circularity, design, compliance, finance, and recovery decisions. ### Metrics - Total articles: 50 - Coverage: 50 of 53 proposed concepts written (94%) - Articles edited since last checkpoint: 22 ## 2026-05-22 ### What's New - **Improved:** [Material-Passport Schema and Interoperability](material-passport-schema.md) — clearer opening gate, tighter Context and Problem prose, cleaner schema requirements, and stronger language around substitutions, IFC imports, and reuse listings. - **Improved:** [Greenwashed Material Claim](greenwashed-material-claim.md) — clearer opening gate, tighter claim-boundary language, fewer hedges, and stronger tests for recyclable, low-carbon, bio-based, regenerative, and certified product claims. - **Improved:** [Hempcrete and Bio-Based Wall Systems](hempcrete-bio-walls.md) — clearer opening gate, tighter circularity framing, cleaner evidence requirements, and sharper limits around structure, moisture, code pathways, and end-of-life claims. - **Improved:** [Mycelium Composites in Construction](mycelium-composites.md) — clearer opening gate, tighter evidence boundaries, stronger cautions around exterior and structural claims, and cleaner consequences for acoustic, thermal, moisture, fire, carbon, and end-of-life claims. - **Improved:** [Cross-Laminated Timber (CLT) and Mass Timber](clt-mass-timber.md) — clearer opening gate, tighter circularity framing, cleaner recovery-route language, and sharper cautions around moisture, connection design, evidence, and secondary-timber claims. - **Improved:** [Panelized Construction](panelized-construction.md) — clearer opening gate, tighter recovery-unit framing, cleaner interface and passport language, and sharper cautions around composite façade panels and future reuse. - **Improved:** [Volumetric Modular Construction](volumetric-modular-construction.md) — clearer opening gate, tighter module-recovery framing, cleaner hotel and bathroom-pod examples, and sharper cautions around removability, documentation, and second-use pathways. - **Improved:** [EU Level(s) Framework](eu-levels-framework.md) — clearer opening gate, tighter circularity-measurement framing, cleaner indicator language, and sharper cautions around certification, procurement, finance, and evidence boundaries. ### Metrics - Total articles: 50 - Coverage: 50 of 53 proposed concepts written (94%) - Articles edited since last checkpoint: 8 ## 2026-05-17 ### What's New - **Improved:** [BIM-Linked Material Tracking](bim-material-tracking.md) — tighter Context and Problem prose, hedge-free Forces and How-It-Plays-Out scenarios, the five-step Solution sequence rewritten as scannable short-sentence stems instead of comma-spliced enumerations, and Liabilities bullets rewritten to match the Benefits-side active-verb register. - **Improved:** [Building Resource Passport (BRP)](building-resource-passport.md) — tighter Context and Problem prose (the long enumerative Problem sentence broken into a topic claim plus a four-Which stem rhythm), hedge-free Forces and How-It-Plays-Out scenarios, the six-layer Definition table cells tightened, and Liabilities bullets rewritten to match the Benefits-side active-verb register. ### Metrics - Total articles: 50 - Coverage: 50 of 53 proposed concepts written (94%) - Articles edited since last checkpoint: 2 ## 2026-05-16 ### What's New - **Improved:** [Connection Hierarchy Mapping](connection-hierarchy-mapping.md) — sharper opening hook and tighter Context, Solution, and How-It-Plays-Out prose. - **Improved:** [Deconstruction Contract](deconstruction-contract.md) — sharper orientation that lands the commercial-versus-design-intent thesis up front, with tighter Forces and How-It-Plays-Out prose. - **Improved:** [Light-as-a-Service](light-service.md) — a clean opening that lands the thesis (the circular move is the incentive alignment, not the LED), tighter context and problem sections, and a split provider-duty sentence for skim-readability. - **Improved:** [Bankability Gap (Circular Construction Finance)](circular-finance-bankability.md) — redrafted with a sharper opening that lands the thesis in one sentence and a five-point list naming what a circular case needs before it can be underwritten: measurable benefits, assignable ownership, enforceable obligations, credible markets, testable reporting. - **Improved:** [Disassembly-Ready Documentation Set](disassembly-documentation-set.md) — sharper orientation that lands the "what survives is whatever was handed over in writing" thesis up front, a Solution rewritten around the four-part anatomy (inventory, schedule, drawings, linked records plus a stewardship rule), and tighter Context, Problem, and Forces. - **Improved:** [Adaptive Reuse](adaptive-reuse.md) — sharper orientation that lands the "first big circular decision is whether to demolish at all" thesis up front, tighter Context, Problem, and Forces, a more direct Solution, and Liabilities bullets rewritten to match the Benefits-side parallelism. - **Improved:** [Long Life, Loose Fit](long-life-loose.md) — lands its principle in the first paragraph before the Alex Gordon history, and the design-capacity examples no longer march in identical-shape rows. - **Improved:** [Shearing Layers (Six S's)](shearing-layers.md) — a plain-orientation paragraph that lands the layered-service-life thesis up front, tighter Context and Problem prose, hedge-free Forces and How-It-Plays-Out scenarios, and Liabilities bullets rewritten to match the Benefits-side active-verb parallelism. ### Metrics - Total articles: 50 - Coverage: 50 of 53 proposed concepts written (94%) - Articles edited since last checkpoint: 8 ## 2026-05-15 ### What's New - **New article:** [DGNB Circular-Building Module and Building Resource Passport](dgnb-circular-module.md) — how DGNB turns circular-building claims into certification, passport, circularity-index, and data-quality evidence. - **Improved:** [Material Passport](material-passport.md) — clearer opening and tighter explanation of how passport evidence turns circular-design claims into recoverable material records. - **Improved:** [Showcase-Pilot Trap](showcase-pilot-trap.md) — clearer opening and tighter guidance for separating useful circular demonstrations from weak precedents. - **Improved:** [Performance-Contract Risk Dump](performance-contract-risk.md) — clearer opening and tighter guidance for spotting circular service contracts that move risk without pricing or control. - **Structural:** improved the [Butterfly Diagram](butterfly-diagram.md) article's related-pattern links so readers can move cleanly between material-route framing and Whole-Life Carbon Assessment. ### Metrics - Total articles: 50 - Coverage: 50 of 53 proposed concepts written (94%) - Articles edited since last checkpoint: 3 ## 2026-05-13 ### What's New - **New article:** [BREEAM Circularity Credits](breeam-circularity-credits.md) — how BREEAM turns material efficiency, responsible sourcing, design for disassembly, adaptability, waste reduction, reuse, and whole-life carbon evidence into certification credits. - **Improved:** [Layered Construction Sequencing](layered-construction-sequencing.md) — clearer opening that explains why reverse assembly depends on construction order, access, and handover records. - **Improved:** [Digital Product Passport (DPP) for Construction Products](construction-product-passport.md) — tighter explanation of what EU product passports do, how they differ from material passports and building resource passports, and why product evidence still has to connect to installed-asset records. - **Improved:** [Embodied Carbon (vs Operational Carbon)](embodied-operational-carbon.md) — clearer opening that separates material emissions from operating emissions and explains why circular decisions need both boundaries. - **Improved:** [Whole-Life Carbon Assessment](whole-life-carbon.md) — clearer opening, tighter module table, and more direct explanation of how WLCA tests circular-construction carbon claims. - **Improved:** [Buildings as Material Banks (BAMB)](buildings-material-banks.md) — clearer opening and tighter explanation of what turns a standing building into recoverable material stock. - **Improved:** [Reversible Mechanical Connection](reversible-mechanical-connection.md) — clearer opening and tighter guidance for judging whether a joint can actually release components for inspection, repair, or reuse. - **Structural:** refreshed section landing pages for [Introduction](introduction.md), [Antipatterns](antipatterns.md), [Capital Finance](capital-finance.md), [Materials Chemistry](materials-chemistry.md), [Modular Offsite](modular-offsite.md), and [Standards](standards-certifications-regulation.md) so their local links match the current articles. ### Metrics - Total articles: 49 - Coverage: 49 of 53 proposed concepts written (92%) - Articles edited since last checkpoint: 6 ## 2026-05-13 ### What's New - **New article:** [Green Bonds for Circular Construction](circular-construction-bonds.md) — how use-of-proceeds finance can support circular construction when eligibility, allocation, impact metrics, and review evidence are explicit. - **New article:** [Sustainability-Linked Loans for Real Estate Decarbonization](sustainability-linked-loans.md) — how borrower-level KPIs, targets, reporting, and verification can tie circular retrofit and decarbonization performance to loan terms. - **New article:** [ISO 20887 Design for Disassembly and Adaptability](iso-20887.md) — how the international DfD/A standard turns disassembly and adaptability claims into testable design principles, records, and cautions. - **Improved:** [Bolt Don't Weld](bolt-dont-weld.md) — clearer opening and tighter guidance on when reversible fastening preserves recoverability. - **Improved:** [Circular Retrofit Investment Case](circular-retrofit-investment.md) — clearer opening and a more scannable structure for the five value streams a retrofit memo has to integrate. - **Improved:** [Butterfly Diagram (Technical and Biological Cycles)](butterfly-diagram.md) — clearer opening that separates technical and biological routes before readers reach the detailed diagnostic frame. - **Improved:** [R-Strategies (R0–R9 / 9R Framework)](nine-r-framework.md) — clearer opening that helps readers test circular claims by where they sit on the value-retention hierarchy. - **Improved:** [Linear Construction (the "Take-Make-Demolish" Baseline)](take-make-demolish.md) — clearer opening that names the take-make-demolish default before readers reach the diagnostic checklist. ### Metrics - Total articles: 48 - Coverage: 48 of 53 proposed concepts written (91%) - Articles edited since last checkpoint: 5 ## 2026-05-13 ### What's New - **New article:** [Specifying Around the Reused-Steel CE-Marking Bottleneck](reused-steel-bottleneck.md) — how to plan the evidence, testing, and acceptance route that lets reclaimed structural members enter a new steel package. - **New article:** [Pre-Demolition Audit (Mandated)](mandated-predemolition-audit.md) — how permit-stage audit requirements make owners inventory materials, products, hazards, and recovery routes before demolition or major renovation begins. - **New article:** [Pre-Demolition Material Audit](predemolition-material-audit.md) — how to survey a building before strip-out or demolition so reusable products, recoverable streams, evidence, and contract duties are visible before ordinary clearance destroys value. - **New article:** [Adaptive-Reuse Feasibility Triage](adaptive-reuse-triage.md) — how to test an existing building for reuse potential before the demolition or replacement path hardens. - **New article:** [Disassembly-in-Theory](disassembly-theory.md) — how to recognize circular building claims that promise future recovery without the records, contracts, access, evidence, and markets needed to make disassembly happen. - **New article:** [Downcycling-as-Circularity](downcycling-circularity.md) — how to spot circular construction claims that give low-value recycling, backfilling, scrap recovery, or energy recovery the same credit as product reuse and retained function. - **New article:** [Façade-as-a-Service](facade-service.md) — how to structure building envelope performance contracts so ownership, maintenance, risk, evidence, and recovery obligations are priced instead of implied. - **New article:** [Greenwashed Material Claim](greenwashed-material-claim.md) — how to test circular, recyclable, low-carbon, bio-based, and regenerative product claims before they enter specifications or reporting. ### Metrics - Total articles: 45 - Coverage: 45 of 53 proposed concepts written (85%) - Articles edited since last checkpoint: 0 ## 2026-05-10 ### What's New - **Improved:** [Introduction](introduction.md) — now gives readers a full orientation to circular built-environment scope, exclusions, reader paths, and pattern-language framing. ### Metrics - Total articles: 37 - Coverage: 37 of 53 proposed concepts written (70%) - Articles edited since last checkpoint: 1 ## 2026-05-09 ### What's New - **New article:** [Reversible Mechanical Connection](reversible-mechanical-connection.md) — how to design joints so components can be released, inspected, and reused instead of destroyed during removal. - **New article:** [Layered Construction Sequencing](layered-construction-sequencing.md) — how to build in layer order so future crews can remove fast-changing parts without damaging slow ones. - **New article:** [Connection Hierarchy Mapping](connection-hierarchy-mapping.md) — how to classify building joints by release cycle, performance duty, and recoverable value before choosing the connection detail. - **New article:** [Disassembly-Ready Documentation Set](disassembly-documentation-set.md) — how to hand over the schedules, inventories, release instructions, and stewardship record future crews need to recover building components intact. - **New article:** [Building Resource Passport (BRP)](building-resource-passport.md) — how asset-level resource records turn material-passport evidence into circularity, data-quality, carbon, and recovery signals owners and investors can use. - **New article:** [Material-Passport Schema and Interoperability](material-passport-schema.md) — how to structure passport fields, identifiers, evidence, data quality, and exchange mappings so circular-building data can travel between systems. - **New article:** [BIM-Linked Material Tracking](bim-material-tracking.md) — how to keep material-passport data tied to model objects, quantities, locations, classifications, and as-built updates instead of a drifting spreadsheet. - **New article:** [Volumetric Modular Construction](volumetric-modular-construction.md) — how factory-built room modules can become recoverable assets when their boundaries, interfaces, records, and relocation routes are designed from the start. - **New article:** [Panelized Construction](panelized-construction.md) — how factory-made wall, floor, roof, and façade panels can become recoverable assemblies rather than larger pieces of mixed waste. - **New article:** [Cross-Laminated Timber (CLT) and Mass Timber](clt-mass-timber.md) — how engineered timber's circular value depends on certification, connection design, moisture history, and credible recovery routes. - **New article:** [Hempcrete and Bio-Based Wall Systems](hempcrete-bio-walls.md) — how hemp-lime walls can support circular construction when binder chemistry, moisture control, code pathway, and end-of-life separation are handled honestly. - **New article:** [Mycelium Composites in Construction](mycelium-composites.md) — how to use grown fungal bio-composites without overclaiming their structural, moisture, fire, or end-of-life performance. - **New article:** [Adaptive Reuse](adaptive-reuse.md) — how to test whether an existing building can carry a new use before demolition destroys its structure, carbon stock, fabric, and recoverable material value. - **New article:** [Shearing Layers (Six S's)](shearing-layers.md) — how to read a building as layers that change at different speeds so fast-changing work does not destroy long-life value. - **New article:** [Long Life, Loose Fit](long-life-loose.md) — how to design durable building layers and changeable infill so a building can keep serving new uses instead of defaulting to demolition. - **New article:** [Open Building (Support and Infill)](support-infill-building.md) — how to separate durable shared support from changeable infill so buildings can adapt without damaging their long-life layers. - **New article:** [Reused Structural Steel](reused-structural-steel.md) — how to recover beams, columns, and other members as identifiable products with the evidence needed for structural reuse rather than scrap recycling. - **New article:** [Recycled Concrete Aggregate (RCA) — and Its Limits](recycled-concrete-aggregate.md) — how to recover concrete as aggregate without confusing low-grade downcycling with closed-loop circularity. - **New article:** [Salvaged Building Components Marketplace](salvaged-components-marketplace.md) — how recovered building products become specifiable, purchasable, and movable before demolition speed destroys their value. - **New article:** [Deconstruction Contract](deconstruction-contract.md) — how to pay for careful dismantling, documented recovery, quality grading, and reuse routing instead of only fast clearance. - **New article:** [Light-as-a-Service](light-service.md) — how lighting performance contracts can align ownership, maintenance, data, finance, and recovery instead of merely financing an LED retrofit. - **New article:** [EU Level(s) Framework](eu-levels-framework.md) — how the European Commission's common building-assessment framework turns circularity, whole-life carbon, resource use, resilience, comfort, and life-cycle value into comparable project evidence. - **New article:** [LEED v5 Circularity Treatment](leed-v5-circularity.md) — how LEED v5 turns embodied carbon, reuse, product selection, product-circularity evidence, and waste diversion into certification prerequisites and credits. - **New article:** [Revised EU Construction Products Regulation (CPR) Effective 2026](revised-cpr-2026.md) — how EU product-market law changes construction-product data, digital passports, sustainability evidence, and circularity claims without by itself proving building-level recoverability. - **New article:** [Bankability Gap (Circular Construction Finance)](circular-finance-bankability.md) — why circular construction needs finance-grade evidence before lenders, investors, and owners can credit its long-term value. - **New article:** [Circular Retrofit Investment Case](circular-retrofit-investment.md) — how to compare retrofit with demolition and replacement using retained material value, avoided embodied carbon, operational improvement, finance eligibility, and future adaptability in one asset case. - **New article:** [Performance-Contract Risk Dump](performance-contract-risk.md) — how circular service contracts fail when ownership, maintenance, finance, insurance, and recovery duties outrun the provider's control and risk capacity. - **New article:** [Showcase-Pilot Trap](showcase-pilot-trap.md) — how to learn from circular-construction pilots without mistaking exceptional funding, procurement freedom, or publicity value for repeatable market proof. ### Metrics - Total articles: 37 - Coverage: 37 of 53 proposed concepts written (70%) - Articles edited since last checkpoint: 0 ## 2026-05-08 ### What's New - **New article:** [Butterfly Diagram (Technical and Biological Cycles)](butterfly-diagram.md) — how to sort circular building claims by the material route they actually depend on. - **New article:** [R-Strategies (R0–R9 / 9R Framework)](nine-r-framework.md) — how to rank circular construction moves by the value they actually preserve. - **New article:** [Linear Construction (the "Take-Make-Demolish" Baseline)](take-make-demolish.md) — how to recognize the one-way material path that circular building practice is trying to replace. - **New article:** [Embodied Carbon (vs Operational Carbon)](embodied-operational-carbon.md) — how to separate material-side emissions from the carbon cost of operating a building. - **New article:** [Whole-Life Carbon Assessment](whole-life-carbon.md) — how to place circular building claims inside a full life-cycle carbon boundary. - **New article:** [Buildings as Material Banks (BAMB)](buildings-material-banks.md) — how to treat a standing building as recoverable stock instead of future demolition waste. - **New article:** [Bolt Don't Weld](bolt-dont-weld.md) — how reversible mechanical fastening preserves component value for future removal, repair, and reuse. - **New article:** [Material Passport](material-passport.md) — how structured material and product records preserve the evidence needed for reuse, recovery, and circular asset decisions. - **New article:** [Digital Product Passport (DPP) for Construction Products](construction-product-passport.md) — how EU product-level records carry construction-product evidence into circular building data. ### Metrics - Total articles: 9 - Coverage: 9 of 53 proposed concepts written (17%) - Articles edited since last checkpoint: 0 --- - 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