Quick Answer
Window repair in Melbourne typically costs $80–$300 for a standard double-hung or casement window (broken latch, balance spring, or re-rope). A broken window pane replacement costs $120–$400 for standard single glazing, or $300–$900 for double-glazed units. Sticking timber windows due to Melbourne’s humidity can often be fixed for $60–$150 in materials and a half-day’s work. Aluminium sliding door track replacement runs $200–$450 including parts and labour.
Window Repair Cost Breakdown
Common Repairs
| Repair Type | Typical Cost | DIY? |
|---|---|---|
| Replace broken window latch/lock | $80–$150 | DIY-friendly |
| Replace double-hung sash cord/rope | $120–$250 | Moderate DIY |
| Replace sash balance spring | $100–$200 | Possible with guide |
| Fix sticking timber window (plane/sand) | $80–$180 labour + materials | DIY-friendly |
| Refit or re-seal weatherstripping | $60–$140 | Easy DIY |
| Replace broken winder mechanism (casement) | $100–$220 | Parts dependent |
| Replace flyscreen mesh | $30–$80 per screen | Easy DIY |
Glass Replacement
| Glass Type | Small Pane (<0.5m²) | Medium (0.5–1.5m²) | Large (>1.5m²) |
|---|---|---|---|
| Standard 4mm float glass | $120–$200 | $180–$320 | $280–$500 |
| Safety laminated glass | $180–$300 | $280–$450 | $400–$700 |
| Double-glazed unit (IGU) | $300–$500 | $450–$750 | $650–$1,200 |
| Toughened/tempered glass | $200–$350 | $320–$550 | $500–$900 |
| Obscure/frosted glass | $140–$240 | $220–$380 | $350–$600 |
Aluminium Window and Sliding Door Repairs
| Repair | Typical Cost | Notes |
|---|---|---|
| Clean and lubricate sliding track | $60–$100 | DIY with track cleaner and silicone spray |
| Replace sliding door rollers | $120–$250 | Parts $30–$80 + labour |
| Replace aluminium window latch | $80–$160 | Parts widely available |
| Replace sliding door track (full) | $280–$550 | Labour intensive — full door removal |
| Re-seal aluminium window frame (rebed) | $100–$200 per window | Prevents water ingress |
DIY Window Repairs You Can Do Yourself
1. Sticking Timber Windows
Melbourne’s seasonal humidity swells timber window frames in summer. The fix: remove the sash, let it dry completely (2–3 days in a dry spot), then plane or sand the sticking face 1–2mm. Apply a coat of exterior primer to the bare timber before reinstalling. Cost: $20–$40 in materials and a half-day’s work. A qualified carpenter charges $80–$180 for the same job.
2. Replacing Flyscreen Mesh
Flyscreen mesh and spline are available from Bunnings or Mitre 10 for $10–$25 per metre. Use a spline roller tool ($8–$15) to push the rubber spline into the frame groove. A standard window screen takes 20–30 minutes to re-mesh. This is one of the easiest and most cost-effective window repairs for Melbourne homeowners.
3. Re-sealing Window Frames
Silicone-free window and door sealant (use “low modulus neutral cure silicone” for aluminium frames) costs $12–$20 per tube at most hardware stores. Remove old cracked sealant with a scraper and mineral turpentine, clean the surface, mask with tape, and apply a neat bead. This prevents water ingress and draught penetration — a common issue in SE Melbourne homes during winter.
Tips and Gotchas
- Don’t use WD-40 on window tracks. It’s a degreaser, not a lubricant. Use dry PTFE spray or silicone spray — these don’t attract dust and actually lubricate the track.
- Sash cords come in pairs. If one breaks on a double-hung window, replace both sides — the second is usually close to failure anyway.
- Measure glass to ±1mm. Glaziers cut to exact specifications — measure width and height in three places and use the smallest measurement.
- Handle broken glass with thick leather gloves, not rubber. Glass shards cut through standard rubber gloves easily. Dispose of broken glass wrapped in newspaper inside a cardboard box labelled GLASS.
- Home insurance may cover accidental glass breakage. Check your policy before paying for a replacement — many home contents or building policies include glass breakage with a $0–$200 excess.
- Old timber frames may need lead paint management in Melbourne homes built before 1970. Sand and plane carefully or get a lead paint test kit ($20 at hardware stores) before sanding.
Local Melbourne Resources
- Bunnings — Glass and Window Repair Products
- Mitre 10 — Windows and Doors DIY Guide
- Glass Industry Association — Find a Glazier — use for anything requiring safety glass specification
Frequently Asked Questions
How much does it cost to replace a broken window pane in Melbourne?
A standard single-glazed broken pane in a Melbourne home costs $120–$320 to replace including glass and labour, depending on size. Double-glazed unit replacement costs $300–$900 for the same size range. Emergency or after-hours glazing adds $100–$200 to any job.
Can I replace a double-glazed unit myself?
Replacing a double-glazed insulated glass unit (IGU) is possible DIY but is technically challenging — the IGU must be sealed and fitted correctly to maintain its thermal performance, and standard glass cutters don’t cut double-glazed units. Unless you have glazing experience, most homeowners are better served by using a professional glazier for IGU replacements. The glass itself must be ordered to exact measurements from a glazing supplier.
Why does my double-glazed window have condensation between the panes?
Internal condensation in a double-glazed window means the gas seal around the IGU has failed, allowing moist air to enter the gap. The glass itself is still intact but the unit’s thermal performance is compromised. The only fix is to replace the IGU — defogging services are largely ineffective long-term. This is a warranty issue if the window is less than 10 years old.
My timber window is warped and won’t close properly — is it worth repairing?
Moderate warping (under 5mm over the sash height) can usually be corrected by a carpenter using a combination of planing, drying, and hardware adjustment. Severe warping or rot means the sash is beyond economic repair — replacement is more cost-effective. For Melbourne homes with original 1960s–1980s timber windows, a full window replacement (timber or aluminium) is often better value than repeated repairs to a deteriorating frame.
Does home insurance cover broken windows in Melbourne?
Many Australian home building insurance policies cover sudden and accidental glass breakage, including windows, as a standard inclusion. Check your product disclosure statement under “Accidental glass breakage” or “Breakage of glass.” Standard excesses range from $0–$500. If the damage was gradual (slowly cracking) or caused by wear and tear, it’s typically not covered.
Final Thoughts
Most window repairs in Melbourne are either DIY-friendly (sticking frames, flyscreens, weatherstripping) or quick glazier jobs (pane replacements). For double-glazed unit failures, budget $300–$900 per unit and get two quotes. Before spending on any repair, check your home insurance policy — accidental glass breakage is covered by many standard home building policies. For older Melbourne homes with timber window frames, an annual inspection and maintenance routine (planing, sealing, painting) prevents the expensive repairs that come from years of neglect.