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Pergola Wiki / Sources and standards
Evidence-led knowledge base

Sources and standards

Official codes, standards, government technical sources and selected primary research underpinning Pergola Wiki.

Source hierarchy

Tier 1: official regulatory and code material; Tier 2: consensus standards; Tier 3: government, research-institute or expert implementation material and peer-reviewed primary research; Tier 4: official technical directories. A tier describes source type—it does not make a document automatically applicable to every project.

Source-register baseline: 25 July 2026; targeted rechecks: 30 July and 2026-08-27 — This is not a same-day full re-review of the content, current edition and local adoption status of all 97 sources.

Targeted edition check: 30 July 2026 — official standards and product-evidence entry points for the United States, European Union, all four UK nations, Australia, Canada and New Zealand were checked; this is not a full content re-review of all 55 registered sources. Review standards navigation · Review product evidence and project dossier。

Conformity-entry check: 29 July 2026 — six ISO, ILAC and European Commission entry points for testing, inspection, product certification, supplier declarations and notified bodies were checked as targeted methodology references. They are not counted among the 55 topic-evidence sources and do not validate a specific report or certificate. Open the report and certificate verification guide。

Download source data and topic-citation relationships →

97 sources

Source tier 1

National Research Council Canada — Provincial or territorial ministries responsible for construction codes (opens in a new tab)

Official directory explaining that provinces and territories have jurisdiction over construction and listing the authorities responsible for adoption, enforcement and interpretation. The directory is a verification route, not evidence that NBC 2025 has been adopted at a specific address.

Living official authority directory; checked 2026-07-30 · ID: canada-code-authorities
Source tier 3

Préfecture de l'Indre — services de l'État — Étude d'adaptation climatique d'un collège — canisses d'ombrage (opens in a new tab)

A site-specific French college adaptation study showing bamboo or heather canisses placed over an existing transparent canopy and fixed to the existing frame, with wet-period rot or fungal growth and eventual replacement identified as constraints. Its layout and approximate replacement timing are not a universal installation detail or service-life claim.

Government-hosted project study; document created 2024-06-07; checked 2026-08-20 · ID: indre-canisse-shade-study
Source tier 3

Préfecture des Bouches-du-Rhône — Ma maison est proche d'un massif forestier — autodiagnostic incendie (opens in a new tab)

Departmental wildfire guidance stating that an attached pergola or awning covered with fabric, canisse or vegetation can ignite and promote fire spread to a dwelling. It is a French wildfire-vulnerability source, not a material fire classification, global clearance rule or product test.

French departmental wildfire guidance; document created 2014-08-19; checked 2026-08-20 · ID: bouches-du-rhone-wildfire-pergola-covers
Source tier 1

Service-Public.fr — Direction de l'information légale et administrative — Quelle autorisation d'urbanisme pour une pergola, un carport ou un abri à bois ? (opens in a new tab)

Official French planning guidance explaining that the applicable filing depends on local planning rules, location, project classification and footprint. It does not determine whether adding a removable shade mat changes a specific project's authorization and does not apply outside France.

Official French guidance; verified 2025-04-11; checked 2026-08-20 · ID: france-pergola-planning-permission
Source tier 1

New Zealand Ministry of Business, Innovation and Employment — Building Performance — 8. Shelters, shades and carports — building consent exemption guidance (opens in a new tab)

Official New Zealand guidance separating carport exemptions up to 20 square metres from conditional 20-to-40-square-metre pathways involving a Chartered Professional Engineer or Licensed Building Practitioner. The detailed conditions must still be checked; the thresholds do not apply outside New Zealand and do not establish structural capacity or project approval.

Official guidance updated 2025-09-09; checked 2026-08-26 · ID: nz-carport-exemptions
Source tier 1

Czech Republic Ministry for Regional Development — Pergola a přístřešek podle zákona č. 283/2021 Sb. — updated official methodology (opens in a new tab)

Official Czech methodology stating that the Building Act does not define pergola or shelter and that modern roofing systems and integrated technologies can make the labels misleading. It directs assessment toward actual construction characteristics, purpose and functional properties. This is Czech methodological context, not a universal definition, project classification, permit outcome or substitute for current planning, fire and local checks.

Official methodology updated 2026-05-06; checked 2026-08-26 · ID: czech-small-shelters
Source tier 1

Slov-Lex — Ministry of Justice of the Slovak Republic — 25/2025 Z. z. Building Act — time version effective 2025-11-01 (opens in a new tab)

Official Slovak legal text listing specified ground-level structures fixed to the ground, including shelters and garages, among small structures when the stated size and other conditions are met. It does not by itself decide notification, project review, planning, fire-safety, local requirements or whether a product sold as a pergola fits that category.

Official consolidated time version effective 2025-11-01; checked 2026-08-26 · ID: slovakia-building-act-2025
Source tier 3

U.S. Occupational Safety and Health Administration — Winter weather hazards — clearing snow from roofs and working at heights (opens in a new tab)

Official workplace guidance requiring snow-removal hazard planning, structural access assessment and preference for methods that avoid roof access where possible. It is an occupational-safety source, not a residential operating instruction or structural calculation.

Living official guidance; checked 2026-08-05 · ID: osha-winter-roof-snow
Source tier 3

Michigan State Police — MIREADY — Preventing Roof Ice Dams (opens in a new tab)

Official Michigan winter-preparedness guidance describing how repeated melt-freeze cycles can create an eave ice barrier, pond water and obstruct gutters or downspouts. It concerns building roofs over attic spaces, not an open pergola or a product-specific winter rating.

Living state-government guidance; checked 2026-08-07 · ID: michigan-roof-ice-dams
Source tier 3

University of Alaska Fairbanks Cooperative Extension Service — Keeping Your House Operating During a Cold Alaska Winter — drain pipes (opens in a new tab)

University extension guidance explaining that standing water and repeated small, slow flows can freeze inside cold drainage sections and progressively block them. It addresses residential drainage in Alaska and does not validate a pergola drain detail, heat-trace design or thawing method.

Reviewed 2022; checked 2026-08-07 · ID: uaf-cold-weather-drain-freeze
Source tier 1

Service-Public.fr — Direction de l'information légale et administrative — Garantie décennale des constructeurs (opens in a new tab)

French official guidance on when builders must hold decennial liability insurance and provide evidence before work starts. Coverage depends on French law, the contracting role, declared work and policy period; it does not establish that every pergola project or participant is covered.

Official French guidance; verified 2024-01-31; checked 2026-08-17 · ID: france-builder-decennial-insurance
Source tier 3

U.S. National Park Service — Outdoor Lighting Principles (opens in a new tab)

Government principles for necessary, targeted, shielded, controlled, low-level and warmer outdoor lighting in park settings. They inform glare and light-spill decisions but are not a universal residential lighting code or pergola illuminance schedule.

Updated 2025-06-17; checked 2026-08-22 · ID: nps-outdoor-lighting
Source tier 1

PlanSA — NCC 2025 state updates (opens in a new tab)

Official South Australian page distinguishing Building Code adoption on 1 May 2027 from Plumbing Code adoption on 1 May 2026. The split must not be collapsed into one whole-of-NCC date.

Living official page; browser-checked 2026-08-03 · ID: sa-ncc-2025-adoption
Source tier 1

Welsh Government — Building regulations: approved documents (opens in a new tab)

Official Welsh collection of guidance for complying with building regulations in Wales. It is a Wales-specific entry point, not evidence that England, Scotland or Northern Ireland guidance applies or that a particular pergola is approved.

Living official collection; checked 2026-07-30 · ID: wales-approved-documents
Source tier 1

Scottish Government — Building standards (opens in a new tab)

Official Scottish collection linking building regulations, technical handbooks and the building-warrant pathway. Applicability depends on the relevant date and project route; the collection is not an England, Wales or Northern Ireland approval path.

Living official collection; checked 2026-07-30 · ID: scotland-building-standards
Source tier 3

Building and Environment — Evaluation of outdoor thermal comfort in sunlight, building shade, and pergola shade during summer in a humid subtropical region (opens in a new tab)

Direct pergola-shade field study in Nagoya with 42 collegiate male participants and ETU, UTCI and OUT_SET* indices. Reported index differences are specific to its climate, dates, subjects, radiation and plant-shade setup and are not universal air-temperature reductions.

Peer-reviewed field study; 2014; DOI 10.1016/j.buildenv.2014.10.002 · ID: horikoshi-pergola-thermal
Source tier 3

ADEME — Canicule : comment rester au frais sans climatisation ? (opens in a new tab)

French public guidance connecting terrace shade, pergolas, vegetation and evapotranspiration, and recommending deciduous planting where summer shade and winter solar access are intended. It is household heat-adaptation guidance, not a pergola cooling rating or plant-selection rule for other climates.

Official French guidance published 2026-05-29; browser-checked 2026-08-19 · ID: ademe-summer-comfort-vegetation
Source tier 3

Cerema — Étude surchauffe urbaine — Châteauneuf-sur-Charente (opens in a new tab)

French public-sector study describing vegetated pergolas as shade devices for seating or pedestrian routes and discussing radiant-exposure and summer-comfort mechanisms. It is local planning evidence, not a controlled product test or a transferable temperature guarantee.

Official local study report; 2024-02; checked 2026-08-19 · ID: cerema-vegetated-pergola-urban-heat
Source tier 3

Office français de la biodiversité — Végétal local (opens in a new tab)

Official French framework for traceable wild plants matched to defined biogeographic regions. It supports a France-specific local-origin and biodiversity check; it does not name a universally suitable pergola climber or replace site horticultural assessment.

Living official French biodiversity guidance; checked 2026-08-19 · ID: ofb-vegetal-local
Source tier 3

Ville de Paris — Végétaliser les toits et les murs (opens in a new tab)

Paris guidance distinguishing self-clinging, twining and tied climbing plants and noting the water, nutrient and maintenance burden of off-ground systems. The support mechanisms inform a pergola brief, but the page addresses Paris building greening and does not establish pergola structural capacity.

Living municipal guidance updated 2026; checked 2026-08-19 · ID: paris-climbing-plant-support
Source tier 1

European Commission — Summary of references of harmonised standards under Regulation (EU) No 305/2011 (opens in a new tab)

Commission summary showing EN 13561:2004+A1:2008 in the CPR harmonised-standards list as generated on 9 February 2026. The summary consolidates Official Journal references for information and does not itself create legal effects; the applicable OJ record and transition period still require a dated check.

Informational consolidated list generated 2026-02-09 · ID: eu-cpr-harmonised-standards-2026