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Melbourne — Tier-1 Pillar

Melbourne Double Glazing — NatHERS 6-Star, Heritage, Acoustic

Melbourne double glazing reality. NatHERS 6-star (moving to 7-star) U-value and SHGC targets, Heritage Overlay slim-bar timber frames, acoustic dividend on tram and flight paths, Owners Corp facade consent. A$12K-A$48K typical.

~1 min read·Updated 2026-04-23

Melbourne double glazing does two jobs. Thermal performance under NatHERS 6-star (moving to 7-star from 2023 NCC) drives U-value targets of 3.0-3.5 with low-e coating. Acoustic performance against trams, traffic, and flight paths delivers 12-18 dB improvement over single-glazed timber sashes.

Heritage Overlay suburbs — Fitzroy, Carlton, Richmond, South Yarra, Hawthorn, Kew, Malvern — typically require heritage-profile timber frames. Slim-bar double-glazed units retrofitted into traditional sash windows cost 40-60% more than standard aluminium or uPVC but deliver compliance with heritage-adviser approval.

AskBaily routes your Melbourne double glazing install to a specialist who balances NatHERS targets, heritage compliance, and acoustic performance.

What a Melbourne double glazing install involves

  • Glazing. Low-e coated IGU, argon-filled. U-value 3.0-3.5, SHGC 0.35-0.55.
  • Frames. Timber (heritage), aluminium, composite, uPVC.
  • Acoustic. Laminated outer pane + IGU — Rw 35-42.
  • OC. OC consent for apartment facade changes.
  • Heritage. Profile matching to original sash/casement/awning.

Frequently asked questions

Can I put aluminium windows on a heritage home? HO-listed — usually no. Slim-bar double-glazed timber sash is the compliant solution.

How much does a Melbourne double glazing install cost? A$12,000-A$18,000 for 8-12 windows aluminium/uPVC. A$26,000-A$34,000 heritage-profile timber. A$40,000-A$48,000+ full-house acoustic-rated heritage.

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Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon’s rim.

He wasn’t the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily’s contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily’s beads.

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