Technical Guides

Standards, performance ratings and section drawings explained in plain English.

Trophy and EMD test reports and certificates

Certifications & Standards

Certified to AS 2047 and CSA. Tested to NFRC and CE (EU 305/2011). What each mark covers, and how to check the numbers yourself.

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Glass

Low-E, double glazing, laminated and acoustic glass, and what each one changes on the quotation.

Bedroom with floor-to-ceiling sliding windows

Window Performance

U-value, air and water tightness, acoustics and wind load, and how to read them on a test report.

Troubleshooting

Condensation, leaks, draughts and hardware faults, what causes each one and what fixes it.

Low-E Glass:

What the Coating Does, and When It Is Worth the Extra Cost

Low-E cuts radiant heat transfer without cutting daylight, but the coating position and the number of coated surfaces change the result. What single, double and triple Low-E do to U-value and SHGC, and which one matches your climate.

Window Acoustics:

What Rw and STC Mean, and How Much Noise You Can Actually Stop

Glass thickness, asymmetric panes, laminated interlayers and seals each contribute differently. What Rw and STC measure, roughly what each build achieves in dB, and why a good window in a bad opening still lets noise in.

Double Glazing:

Cavity Width, Gas Fill and What Actually Changes the U-Value

Two panes are only the start. The cavity width, whether it is air or argon, the spacer bar and the Low-E coating each move the number. Typical Uw figures for 5+12A+5, 5+20A+5 and argon-filled units, and where the gains stop.

Water draining from a window frame under test

Water Tightness Ratings Explained:

EN 12208, ASTM E547 and AS 2047

Three regions, three test methods, three sets of numbers. What Class 7A, 8 psf and the AS 2047 water resistance figure each represent, how they compare, and which class a coastal or high-rise project should be asking for.

Uw, Ug and U-factor:

Reading Thermal Performance on a Window Quotation

Europe quotes Uw in W/m²K, North America quotes U-factor in Btu/h·ft²·°F, and the two are not the same number. How to convert between them, what the thermal break contributes, and what figure your local code asks for.

Air Tightness Ratings Explained:

EN 12207, ASTM E283 and What Class 4 Means

Air leakage is measured at a set pressure and reported per square metre of window or per metre of joint. What the classes mean, why air tightness drives heating cost more than glass does, and how it is tested.

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