Key Takeaways
- Double glazing for renovations works best when windows are planned early, before walls, floors and finishes are locked in.
- Replacing old windows is one of the most effective upgrades because air leaks around doors and windows account for up to 30% of a home’s energy loss.
- uPVC suits renovations because it insulates, resists moisture and does not need repainting.
- Get a free measure and fixed-price quote before you set your renovation budget, so window costs are known upfront.
Why Windows Belong at the Start of Your Renovation
Many homeowners leave windows until the end of a renovation and then find the budget has run out. That is a missed opportunity, because windows affect comfort, noise, security and energy bills in every room you are improving.
Old single glazed windows and loose frames undo the benefit of new insulation and heating. Fitting double glazing at the same time protects your investment in the rest of the project.
- Comfort: warmer glass in winter and cooler rooms in summer.
- Energy savings: Ultimate Windows says double glazing can slash your annual power bill by up to 90%.
- Noise reduction: sealed units and laminated glass cut traffic and neighbour noise.
- Condensation control: warmer inner glass reduces damp and mould around frames.
- Kerb appeal: modern frames refresh the look of the whole house.
Planning Double Glazing Into a Renovation
Good sequencing saves money and avoids rework. These steps show where windows fit in a typical renovation timeline.
- Decide which rooms and walls are being changed, since new openings affect window sizes.
- Book a free measure early so the windows can be made to the exact openings.
- Confirm the glass specification for each room, such as Low-E, argon or acoustic laminated.
- Allow for manufacturing time, because windows are made to measure.
- Schedule installation before final plastering, painting and flooring where possible.
- Plan for ventilation as the home becomes more airtight.
If you are replacing windows only, our replacement windows in Melbourne page explains the process.
Why uPVC Is a Strong Choice for Renovations
Renovations often involve older homes with uneven openings, damp walls and changing seasons. uPVC handles these conditions well, and it keeps working without constant upkeep.
Our uPVC double glazed windows are up to 4.5 times more energy efficient than standard aluminium-framed windows.
- Insulation: multi-chamber profiles slow heat flow through the frame.
- Moisture resistance: uPVC does not rot, rust or swell.
- Low maintenance: no repainting, so the frames stay looking new.
- Durability: a typical life of 25 to 30 years.
- Tested for conditions: our profiles are exposure tested and built to AS 2047.
What Double Glazing Does Compared With Single Glazing
A double glazed unit has two panes with a sealed gap between them. That gap is filled with argon gas at Ultimate Windows at no extra cost, which slows heat transfer.
The result is a window that keeps heat inside in winter and outside in summer. Double glazing typically reduces heat loss or gain by 75% to 80% compared with single glazing.
| Feature | Single glazing | Double glazing |
|---|---|---|
| Heat loss or gain | High | Typically 75% to 80% less |
| Inside glass temperature | Close to outdoor temperature | Closer to room temperature |
| Condensation | Common in cold weather | Much reduced |
| Noise reduction | Limited | Improved, more with laminated glass |
Budgeting for Double Glazing in Your Renovation
Windows are a large line item, so give them a proper budget early. Prices vary by style, size and glass, but typical installed ranges in Melbourne give a useful starting point.
- Fixed windows: $1,700 to $2,500+
- Sliding windows: $2,200 to $3,400+
- Awning and casement windows: $2,100 to $3,400+
- Tilt and turn windows: $2,000 to $3,300+
- Bay or corner windows: $5,500 to $10,000+
- Sliding doors: $3,800 to $7,500+
Low-E glass typically adds 10 to 20%, and acoustic laminated glass typically adds 20 to 35%. For more help, read our guides to double glazing cost in Melbourne and how to plan your double glazing budget.
Staging Your Upgrade
You do not have to replace every window at once. Staging can spread cost, although doing it together usually reduces disruption.
- Start with problem rooms: bedrooms, living areas and noisy street-facing windows.
- Prioritise leaky windows: draughty or damaged frames waste the most energy.
- Match the look: use the same frame colour and style so the house looks consistent.
- Use finance: 100% finance is available through our Australian finance partner.
Common Renovation Mistakes to Avoid
Most window problems in renovations come from decisions made too late or too cheaply. Avoid these traps.
- Choosing windows last: forces compromises on size and budget.
- Ignoring installation quality: gaps around the frame leak air and water.
- Buying on price alone: check the glass specification and guarantee.
- Forgetting ventilation: a sealed home needs fresh air to control moisture.
- Using contractors you do not know: our team installs every job in-house.
Choosing Window Styles Room by Room
A renovation is the ideal time to rethink how each room uses its windows. The right style can fix ventilation and access problems at the same time as improving insulation.
- Living areas: large fixed panes for views, paired with an opening window for airflow.
- Bedrooms: tilt and turn or casement windows for secure ventilation and easy cleaning.
- Kitchens: awning windows above benches, or a servery window to the outdoors.
- Bathrooms: awning windows with obscure glass for privacy and moisture control.
- Doors to outdoors: sliding, lift and slide or hinged doors with double glazing.
What You Get With Ultimate Windows
We are a family-owned business that has made windows since 2001 and uPVC since 2014. Our factory in Wodonga, Victoria, is solar powered, and our in-house team installs every job.
- Free measure and fixed-price quote: with no hidden fees.
- 12-year guarantee: seven years longer than the five years recommended by the AWA.
- Argon gas as standard: included at no extra cost.
- Showrooms: visit Bundoora or Vermont by appointment.
Frequently Asked Questions
Is double glazing worth it during a renovation?
Usually yes. Fitting double glazing while walls and finishes are already being worked on avoids disruption later and protects the rest of your investment. It improves comfort, reduces noise and helps cut heating and cooling costs, particularly in older homes with draughty frames.
Can I add double glazing to an existing house?
Yes. Existing windows can be replaced with made-to-measure double glazed units that fit the current openings. A free measure confirms sizes and options, and an experienced installer will seal the frame to the wall so the new windows perform as designed.
When should windows be installed in a renovation?
Plan windows early, then install them before final plastering, painting and flooring where possible. Because windows are made to measure, allow manufacturing time after the measure. Ordering late can hold up the whole project and delay sign-off on your build.
Do I need approval to replace my windows?
It depends on your property. Homes under heritage overlays or in some areas may need approval for changes. Check with your local council or building surveyor before ordering, and tell your supplier about any restrictions so the right frames are specified.
Start Your Renovation With Better Windows
Our team can help you plan double glazing into your renovation and give you a free measure and fixed-price quote. Call 1300 898 782 or contact us online to talk through your project.
