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Find your route.
Find the right evidence. Understand what it covers. Know what to send us next.
Describe your question or choose a topic, add a little context, and get a route through The Bench's published material — with a summary you can bring to Ask The Bench. It is a guided route, not a chatbot, and nothing you enter leaves this browser unless you send an enquiry.
Guided route
- 01Your questionDescribe it or choose a topic
- 02A little contextRole, stage, product, documents
- 03Your routeWhere to start, what to send
This is a guided routing tool, not a chatbot and not advice. It points you to material The Bench has published and explains what usually helps. It cannot tell you whether a product, build-up or design is suitable, compliant or acceptable to Building Control — that needs the full project information and the right professional. Nothing you enter here is sent or stored anywhere until you choose to send an enquiry.
Browse insteadBrowse all routes, by topic52 routes · 17 topics
The same routes the guided steps use, listed in full. Each one says what the destination covers.
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What does a fire rating or classification actually cover?
The Bench has not published a study on board or system fire resistance.
- Fire performance Fire resistance is system/build-up/application specific; reaction to fire is not fire resistance.
- The Fire Rating Is Only the Start Reactive coatings on structural steel only — not evidence for boards or any other product. (when the question is about structural steel, reactive (intumescent) coatings or what a fire rating covers)
- Declared performance is tied to a declared intended use Law in force (England); checked 23 September 2026; not legal advice.
- A product mark is not a statement that the product suits your use Law in force (England); checked 23 September 2026.
- Cavity vs No Cavity? (fire pathways discussion) External-wall fire-pathway / assembly-scope discussion only. (when the question is about external wall fire)
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Thermal performance or U-values
This site has no U-value content or calculation.
- Thermal and U-values Reading route; no U-value calculation is offered by the site.
- Cavity vs No Cavity? (solar gain and summer heat) External-wall solar/summer discussion; not a U-value result. (when the question is about summer heat, overheating or climate)
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Moisture, condensation or mould
This site does not offer condensation risk analysis.
- Moisture and mould risk Reading route; not a condensation risk analysis.
- Cavity vs No Cavity? (moisture pathways) Moisture pathways and cavity functions; England/UK evidence base as stated in the report.
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Racking or sheathing
The Bench has not yet published a racking-specific study.
- Racking and sheathing No racking-specific Bench study has been published yet.
- Hicem fibre cement board Product knowledge route only; no racking claim. (when the question names Hicem or board sheathing)
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External walls: cavity or cavity-free?
- Cavity vs No Cavity? Evidence review of strategies and evidence classes; does not assess any specific project build-up.
- Façades and external walls Reading route: questions, documents and where the evidence falls short.
- Renders and brick slips Cavity and cavity-free assemblies reviewed as strategies; not approval of any system. (when the question is about render, brick slips or ETICS)
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How a build-up or system is evidenced
- System build-ups Reading route: the tested build-up compared with the proposed one.
- Cavity vs No Cavity? (functions and interfaces) Function/interface explanations; no project build-up assessed.
- The Fire Rating Is Only the Start (coating system build-up) Coating system build-up figure; reactive coatings scope only. (when the question is about coated steel or a reactive coating system)
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Walls, floors and ceilings (linings, partitions, decks)
No dedicated Bench investigation yet.
- Walls, floors and ceilings No dedicated Bench investigation has been published yet.
- Hilux calcium silicate board Product knowledge only; no system fire approval from image or page. (when the question names Hilux or board linings)
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I want to understand an evidence topic
- Learn The Bench library: publications, evidence areas and Evidence Watch.
- Evidence areas Eight areas. Links between them are reading routes, not approval.
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A product has been (or may be) swapped
- Substitution changes the evidence Law in force (England); checked 23 September 2026.
- Traceability Proposed not law; checked 23 September 2026.
- Change control: a product swap is a recorded event Higher-risk buildings in England only; official guidance. (for higher-risk buildings in England, or if you are not sure)
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Higher-risk buildings, Gateway 2 or 3, golden thread
These routes apply to higher-risk buildings in England only.
- Building control approval for higher-risk buildings England HRB only.
- Gateway 2: approval before work starts England HRB only.
- The golden thread England HRB only.
- Change control England HRB only.
- Gateway 3 and completion England HRB only.
- Competence is a legal requirement Law in force (England).
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Product regulation and reform
Proposals are not law. Evidence Watch is not legal advice.
- Evidence Watch Law / guidance / proposal / watch statuses stay distinct; checked 23 September 2026.
- Materials must suit the circumstances Law in force (England).
- Outside the product regulations Watch item.
- Construction products reform Proposed not law.
- General Safety Requirement proposal Proposed not law.
- Licensing certification bodies (proposal) Proposed not law.
- Products work as systems Watch item.
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Does this document answer my question?
- A product mark is not a statement that the product suits your use Law in force (England).
- Declared performance is tied to a declared intended use Law in force (England).
- Common evidence gaps Where evidence commonly falls short. A gap is an open question, not a defect.
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I've received an evidence query (Building Control, client, insurer)
- Common evidence gaps Where evidence commonly falls short. A gap is an open question, not a defect.
- What We Do Service explanation; no outcome promised.
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About a specific product: Hicem, Hilux, Protherm Light
Manufacturer data describes the product; it is not independent proof of how it performs in a build-up.
- Hicem fibre cement board Product record. Manufacturer data is not independent proof. (when the product is Hicem)
- Hilux calcium silicate board Product record. Manufacturer data is not independent proof. (when the product is Hilux)
- Protherm Light Product record. Manufacturer data is not independent proof. (when you choose Protherm Light)
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I need my project or build-up reviewed
- What We Do Service explanation.
- Ask The Bench Your Navigator summary can come with you.
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Who are The Bench, and how does it work?
- About Brand/profile; not technical evidence.
- What We Do Service explanation; no outcome promised.
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Browse publications and videos
- Investigations Publication shelf.
- Cavity vs No Cavity? The publication page, with the report and the briefing film.
- The Fire Rating Is Only the Start The publication page, with the report and the short film.
Route table RT-V03 (52 routes) · Navigator NAV-L1-V01 / 2026-10-03. Routes point only to published pages; planned or internal material is never routed.
Ready to ask your actual question?
Send the question, the project detail and the documents you already have. No charge to submit — we quote before any written work starts.
What helps us start
- The question, as it was put to you
- What the product or build-up is, and where it is going
- The documents you already have — data sheets, reports, certificates, drawings
- Any comment from Building Control, the designer or the client
- When you need an answer
You do not need a complete set to get in touch — send what you have.