The black box, opened.
We model the real windows and interfaces in your project — condensation, mould and energy to ISO 15099. Evidence your certifier can rely on, not a generic rating.
When condensation and mould end up in dispute — the modelling is the part you’re not worried about.
Mould and condensation disputes land on whoever signed the design off. AFRC Lab models the real interfaces in your project — windows, walls and the junctions between them — for condensation, mould and energy to ISO 15099, the international standard. Not a generic rating. The result is on the record before it’s built: if it’s modelled, that’s your evidence — if it isn’t, it’s “we didn’t know.”
AFRC Lab engine
Sill section · thermal + condensation
ISO 15099 · live
Which one are you?
Build & rate your own — BTW
Your systems, your sizes. Model any window to ISO 15099 in the app — Uw, SHGC, condensation, carbon — and reverse-engineer the glass to hit target. Self-serve, as many as you like.
Try BTW — live demo → Already on BTW? Log in …or have us assess one for you →We model it, you get the evidence — TIRS
Send the project. We model the real interface — windows, walls and the junctions between — for condensation and Mould Index to ISO 15099, and hand you an audit-ready result for the file.
Request an assessment →Prove it before you procure — FHK+ed
Independent pre-procurement compliance proof on the specified systems, then an on-site audit of what’s actually supplied — audit-ready, usually under $5k. Non-compliance stays a redline, not a variation.
Prove it before you procure → Installing? Training & advice →Plenty of window companies use both — build in BTW, and have us assess the tricky ones. Send us one window and we’ll model it free — either way.
What do you need to prove?
Jump straight to it — or scroll on for the full picture.
Three ways to work with us.
From a self-serve number to a full forensic dossier — pick the depth the project needs.
BTW — Build The Window
Model the window you’re actually installing to ISO 15099 — one build returns the whole output set, and reverse-engineers the glass and frame to hit your target. The accurate alternative to WERS/DTS defaults.
- Uw, SHGC, Tvis & R — any size, config & glass
- Condensation / mould scan
- Embodied carbon, recyclability & weight
- Reverse-engineers glass & frame to a Uw / SHGC target
TIRS™ MI-6
The condensation compliance number. An Outcome X forensic assessment that returns the Mould Index (ISO 13788 / VTT) your project needs for NCC condensation — the sole determinant under F8V1 / H4V5.
- Decision-ready Mould Index vs the 3.0 limit
- Per-junction, per-climate-zone
- Audit-ready evidence for the certifier
TIRS™ — full suite
The complete forensic dossier: condensation and heat loads, full thermal performance and per-section working — the whole window, evidenced. The depth behind our case-study work.
- Everything in MI-6 — across Outcome X, winter & summer
- Heat loads & full thermal performance
- Solar & vapour analysis
- Per-section working (frame, sash, edge, COG) across the glass ladder
Scope and outputs are confirmed per project. BTW, TIRS™ MI-6 and the full TIRS™ suite all produce verification data; final NCC compliance is determined by your assessor / certifier.
This is what you actually get.
A redacted page from a live TIRS™ MI-6 assessment — the exact compliance gate a certifier sees. No black box: the number, the limit, and the forensic inputs behind it.
| NCC compliance gate | Result | NCC limit | Status |
|---|---|---|---|
Mould Index AIRAH DA07 (ISO 13788 / VTT) · sole NCC determinant | 2.59 / 6 | ≤ 3.0 | Within limit |
| Forensic metric | Outcome X | CZ target | Band |
|---|---|---|---|
| Min surface temp (Ti) | 13.62 °C | ≥ 12.6 | Acceptable |
| Temperature factor (fRsi) | 0.68 | ≥ 0.43 | Robust |
| Surface humidity (RHsi) | 75% RH | ≤ 80% | Marginal |
Sample output, client details redacted. Every MI-6 assessment returns this gate — per junction, per climate zone. Final NCC compliance is determined by your assessor / certifier.
The lab the consultants consult — and the builder’s compliance security blanket.
H/F condensation compliance on glazed façades is genuinely misunderstood — by the consultants as much as anyone. That’s why ESD and façade engineers already lean on our modelling, not just window manufacturers. AFRC Lab works at a rare intersection in this country: building physics, fenestration and façade systems, and the NCC — windows, walls and the interfaces between them, under one roof. The new offerings extend that same certainty to the builders carrying the compliance risk.
Two ways to prove it. BTW is the other one.
Separate question now: not what you must meet (Section J, and Section H/F), but how you prove it. The NCC is a performance-based code — a window complies by the prescriptive Deemed-to-Satisfy default (where WERS lives), or by a Performance Solution assessed against the Requirement directly. That second route is the other compliance path, and it’s the one BTW is built for.
The prescriptive default
The recipe route — default look-up values, with WERS defaults standing in for the glazing. Generic, and often over-specified.
- ·A generic standard size, not your opening.
- ·Conservative defaults that can inflate the spec — and the price.
- ·Silent on condensation and mould.
A verified outcome for your actual window
BTW models the window you’re installing — real size, configuration and glass — to ISO 15099, serving three of the four NCC Assessment Methods (NCC A2.2).
- →Evidence of Suitability — whole-window Uw, SHGC & Tvis, showing the window is fit for purpose.
- →Verification Method — feeds Section J / NatHERS energy verification.
- →Comparison with the Deemed-to-Satisfy Provisions — your real number against the default.
AFRC Lab provides the verification data; your certifier determines compliance. We give you the modelled evidence — you achieve the certification. The performance path is a valid, Code-recognised route to compliance; for windows, the WERS/DTS default is one option, not a requirement.
Every NCC angle on a glazed façade.
Not just energy and condensation — the full set of performance data for glazed façades and fenestration. Where testing or certification is required, we deliver it through our accredited partners. We provide the verification data; you achieve the certification. Clauses shown are Australia’s NCC 2025 — the same ISO 15099 / THERM / NFRC 100 outputs map to codes in other markets.
Energy
Project-specific whole-window U-value & SHGC via BTW — ISO 15099 / NFRC 100, not a DTS default. Often a better, less over-specified result.
Condensation & mould
TIRS™ forensic hygrothermal analysis — the AIRAH DA07 Mould Index for health, amenity & moisture management.
Acoustic
Acoustic simulation & reporting for glazed products — Rw, C and Ctr with glass and interlayer selection to hit the sound-insulation thresholds.
Fire
Accredited partnersFire compliance of glazed façades, windows & doors — from system testing through fire-engineered Performance Solutions to certification. One point of contact.
Embodied carbon
Verification partnerUpfront-carbon data for façade & glazing — from BTW screening estimates to verified Product Carbon Footprints. Measure, reduce, disclose.
OPTISEALED™
Window-installation training, advice & guidelines — structural connection details and weatherproofing strategies so site practice is certifiable, not guesswork. Led by an FGIA Window Installation Master.
FHK+ed™
Pre-procurement façade compliance proof for builders — we verify the specified systems for Section J and Section F/H before you procure, then audit what’s actually supplied on site. Non-compliance stays a redline, not a variation.
From our core out to the whole chain.
Window manufacturers are our core. The new offerings reach the consultants who want a specialist to lean on, and the builders who need someone accountable behind the numbers.
Our core. The real number so you quote sharp and win the work — your own systems, your branding, un-blurred reports.
The consultant’s consultant. Back your spec with the actual installed window so it survives shop-drawing stage — and hand us the fenestration physics you’d rather not own.
Your compliance security blanket. Prove the envelope before it’s locked, kill late-stage VE churn, and have someone accountable standing behind the window numbers.
Specify glazing you can trust is both buildable and accurate — genuinely fit for purpose on energy, condensation and mould.
Check the specified values reflect the window that’s actually installed.
The quiet one: a window that passes energy and still keeps the mould out in winter.
Prove the façade before you procure.
Independent façade-compliance proof, built for the estimator. We verify every specified system for Section J and Section F/H before you procure, then check it against what’s actually supplied on site. For years ‘compliant’ meant paperwork — priced in, rarely checked. That’s changing: compliance now has to be proven.
The cost of catching it late — same defect, multiplying at every stage
What you get
- An independent compliance report — every specified system proven for Section J & F/H
- Checked against what’s actually supplied on site — audit-ready both ways
- Price the package with certainty, before you procure
- Non-compliance stays a redline, not a variation
Log in — or hand it to us.
BTW clients log in and run their own projects on demand. TIRS assessments we deliver for you — send us the section and we’ll model it. New to BTW? Request access and we’ll set you up.
Build The Window
Model the window you’re installing to ISO 15099 — Uw, SHGC, Tvis, a condensation & mould scan, carbon and weight, reverse-engineered to your target.
Log in to BTW → TIRS™ · assessed by usThermal Interface Rating System
The forensic condensation & Mould Index assessment behind the compliance number — any interface, any junction, scored against the NCC limit. We run it; you get the report.
Request an assessment →Accounts are set up per fabricator / practice. Request access →
Talk to the window nerd.
Behind AFRC Lab is one obsessive fenestration specialist — the person who builds the model and stands behind the result. A junction that won’t behave, a WERS figure you don’t trust, or a flat “can this even be done?” — you talk to Dave, not a queue.
No sales team, no gatekeeping — just the person who does the work.
Thermal fields, before & afters, and the odd black-art explainer.
Channels are launching shortly — real modelled results, compliance notes, and what we’re seeing across Australian projects. The science, in public.