Double Glazing Providers

Pros

• +Full national coverage across all capital cities with a network of accredited installers — consistent quality standards and warranty support wherever you are in Australia
• +Comprehensive survey and quotation process includes thermal imaging assessment to identify the most impactful windows to upgrade first — helps prioritise budget allocation
• +European-sourced insulated glass units with 15-year manufacturer warranty on seal integrity — superior quality compared to many locally manufactured units

Cons

• –Premium pricing reflects the brand's quality positioning — Everest Windows is not the cheapest double glazing option available
• –Lead times can be 4–6 weeks for custom IGU manufacturing — not suitable for urgent projects requiring immediate installation

Pros

• +Australia's leading secondary glazing specialist with over 25 years of experience — the magnetic system is proven, well-engineered, and backed by extensive installation expertise
• +Ideal for heritage-listed buildings where original windows must be retained — Magnetite panels are virtually invisible from outside and do not alter the external appearance of the building
• +Most affordable entry point for improved thermal and acoustic performance — secondary glazing costs 30–50% less than full retrofit double glazing while delivering meaningful improvements

Cons

• –Secondary glazing is less effective thermally than true double glazing — the air gap and seal quality are not as good as a factory-sealed IGU
• –The secondary panel adds a visible layer to the interior of the window — some homeowners find this aesthetically less appealing than retrofit double glazing

Pros

• +Patented dry retrofit system specifically engineered for timber-framed windows — no need to remove the window frame from the wall, minimising dust, disruption, and restoration costs
• +Preserves the original timber character and appearance of heritage and period homes — the retrofit is virtually invisible from both inside and outside the property
• +National franchise network with specialised training ensures consistent quality — all Thermawood installers are certified in the patented system

Cons

• –System is designed primarily for timber frames — not suitable for aluminium-framed windows without additional frame modification work
• –Slightly higher per-window cost than basic retrofit due to the specialised system — expect to pay 10–20% more than a standard glass-only retrofit

Pros

• +Deep expertise in managing Perth's extreme heat conditions — APS specialises in high-performance Low-E and tinted glass options that significantly reduce cooling costs in Western Australian homes
• +Competitive pricing for Western Australian customers — local manufacturing and procurement keeps costs lower than national brands that ship from the east coast
• +Comprehensive service range from basic retrofits through to full commercial glazing projects — a single provider can handle residential and commercial needs

Cons

• –Service area is limited to Western Australia — not available for projects in other states
• –Smaller company than national franchises — capacity may be limited during peak demand periods, leading to longer lead times

Pros

• +Most affordable double glazing option in South Australia — competitive pricing for both supply-and-install and supply-only orders makes double glazing accessible to more homeowners
• +Supply-only option available for competent DIY installers — provides significant savings (30–50%) on labour costs for homeowners with the skills and tools to self-install
• +Wide range of IGU sizes and specifications available including Low-E, argon fill, acoustic, and tinted options — flexible stock means shorter lead times for standard sizes

Cons

• –Installation service area is limited to metropolitan Adelaide and surrounding regions — not available for installed projects outside South Australia
• –Smaller team than national providers — fewer installation crews means longer wait times during busy periods (autumn and early winter)