aluplast IDEAL 2000 / 4000 — where each sill stops meeting the NCC limit.
Step each sill down the glass ladder, best glass to worst, and watch where the condensation and mould limit gives way. Better glass alone doesn’t always fix it — the frame and the edge of glass decide.
Pick a climate zone.
Each sill shows its quoted glass builds — triple silver low-E through to the clear “standard” build. The chip turns red at the first build that no longer meets the NCC condensation limit (Mould Index ≤ 3.0). Tap any build for the full five-condition detail.
Mould Index and the NCC gate (MI ≤ 3.0, equivalent to a minimum surface temperature ≥ 12.6 °C) are TIRS™ assessment outputs at the stated conditions. The appointed certifying authority determines compliance.
The three IDEAL 2000 fixed builds.
The same IDEAL 2000 fixed sill, as installed with the reveal, across the three quoted builds — triple silver low-E with a warm-edge spacer, double silver low-E with an aluminium spacer, and the clear, air-filled aluminium-spacer “standard” build. Same frame; the glass and spacer change, and it lands right where the margin is thinnest.
All four sills, the quoted builds.
TIRS™ score and Mould Index for every sill and quoted glass build in the selected zone. The colour is the TIRS band; a cross marks a build that exceeds the NCC limit, and cells marked — sit outside the quoted scope. Tap any cell for the detail.
The compliance cheat sheet.
One sheet per sill: the glass ladder down the side, the climate zones across the top, pass or fail against the NCC condensation limit (Mould Index ≤ 3.0) in every modelled cell. Click a zone on the map to see where it is and highlight its column. Blank cells aren’t modelled yet — they fill in as the study extends.
Full passports & reports.
The complete TIRS™ Window Passport for each sill — the full forensic record behind the cheat sheet, ready for your sales team and the compliance file.
The glass, decoded.
What each GT code in the ladder is built from — and, for anyone not across the jargon, common Australian glass products in each tier, so “triple silver low-E” lands as glass you’ll recognise. The study names glass by generic build; these are familiar examples to picture it by, not a specification or endorsement.
Product examples only, grouped by silver tier from their solar-control performance — glass is modelled by generic build, and AFRC Lab does not supply or endorse glass products.
The method, in plain terms.
Every sill is drawn as installed with its reveal, and carries the same interior condition: 20 °C and 50% relative humidity in every zone. Only the frame, the edge of glass and the outdoor climate change.