Windows

Double Glazing Sliding Windows

Retrofit double glazing for your existing sliding window frames - no need to replace the whole window. We remove the single-glazed unit and install a custom-cut, high-performance sealed unit in its place.

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Double Glazing Cost Calculator

$650 to $950

Per Panel

Per panel, depending on size. Price above includes Economy ThermoTech™ glass as standard - use the toggle below to see other glass options and what they add.

  • Sash rebate modified to fit double glazed unit
  • Double Glazed unit, fully installed within existing frame
  • Beading replaced with new hardwood beads
  • Sliding window rehung retaining operation
  • Removal and recycling of old glass

Glass Options

Most popular

Economy ThermoTech™

$285 /sqm

U-VALUE
2.5

SHGC / VLT
0.71 / 78

WARRANTY
10 yr

  • Two sheets 4mm glass
  • 12mm argon gap
  • Doubles energy efficiency
  • Australian made
Most popular

LightBridge / Optitherm™

$395 /sqm

U-VALUE
1.4

SHGC / VLT
0.59 / 79

WARRANTY
10 yr

  • Toughened 4mm glass
  • Argon gap
  • Low-E coating
  • Grade A safety glass
Best for noise

LightBridge Next / Optitherm Hush™

$455 /sqm

U-VALUE
1.4

ACOUSTIC
RW38

WARRANTY
10 yr

  • 6.5mm VLam Hush layer
  • Thermal spacer + argon
  • UV protection (<1% trans)
  • Impact-resistant laminate
Best for heritage

Ultimate Performance VIG

$895 /sqm

U-VALUE
0.4

THICKNESS
8.3mm

WARRANTY
15 yr

  • Vacuum insulated glass
  • Titanium seal, 0.3mm gap
  • Reduces heat loss 93%
  • Grade A safety glass

Other window styles

casement window

Casement Windows

From $600

View pricing
doublehungwindow322x200

Double Hung Windows

From $1,500

View pricing
sash window

Sash Windows

From $1,500

View pricing
awning window

Awning Windows

From $600

View pricing
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