Quick Answer
Draught-proofing a typical Melbourne home costs $200–$1,200 for a professional job, or $80–$300 if you DIY. Sealing gaps around doors, windows, floorboards, and exhaust fans is one of the highest-return energy upgrades available — most Melbourne homeowners save $150–$400 per year on heating and cooling, paying back the cost within 1–3 years.
Melbourne winters are cold and draughty, especially in older timber homes in suburbs like Berwick, Frankston, Dandenong, and Narre Warren. Gaps around doors, under skirting boards, and through uninsulated floorboards can account for up to 25% of a home’s heat loss. Draught-proofing is cheap, quick, and delivers measurable savings from the first winter.
Draught-Proofing Cost Breakdown
Professional Draught-Proofing Service
| Service | Cost (Labour + Materials) | Notes |
|---|---|---|
| Full home draught-proofing assessment + seal | $400–$1,200 | Blower-door test + all gaps sealed; 3–4 hours |
| Doors only (5 doors) | $200–$450 | Includes door sweeps and compression seals |
| Windows only (10 windows) | $250–$600 | Foam tape, V-strip seals, brush seals |
| Subfloor draught sealing | $300–$900 | Insulation batts + mesh, blocking airgaps |
| Exhaust fan draft stoppers | $80–$200 | Ceiling exhaust fans are major heat loss points |
DIY Draught-Proofing Materials Cost
| Product | Cost | Use Case |
|---|---|---|
| Door bottom sweep (aluminium + rubber) | $15–$45 per door | Under-door gaps — most common heat loss point |
| Self-adhesive foam seal tape (P-profile, 10m roll) | $8–$20 | Window frames, door stop surfaces |
| V-strip (spring bronze or plastic) | $12–$30 for 5m | Side edges of sliding windows and sash windows |
| Silicone gap filler (skirting boards, pipes) | $10–$18 per tube | Gaps at wall/floor junctions, pipe penetrations |
| Draught excluder — door snake | $12–$30 | Temporary fix for large under-door gaps |
| Exhaust fan draught stopper (ceiling mount) | $20–$55 per fan | Bathroom/laundry fans — significant heat loss |
| Letterbox draught seal | $15–$35 | Older letterboxes in door are major draught sources |
What Affects Draught-Proofing Costs?
1. Age and Construction of the Home
Pre-1980 Melbourne homes — brick veneer, weatherboard, and older fibro builds in suburbs like Frankston, Dandenong North, and Pakenham — have far more draught pathways than modern constructions. Floorboards, architraves, and older window frames all develop gaps as timber shrinks and settles. Expect to pay at the higher end for older homes.
2. Number of Openings
Each door, window, exhaust fan, and floor penetration adds to the total job. A four-bedroom home with 15 windows and 6 doors will cost roughly twice as much as a two-bedroom unit to fully seal.
3. Access Difficulty
Subfloor sealing in homes on stumps or over a crawl space requires access hatches and may involve tight spaces. This adds time and cost versus ground-floor slab homes.
4. DIY vs Professional
DIY draught-proofing is straightforward for doors and windows — no special tools or licences required. Professional services add value through blower-door testing (which identifies hidden gaps you can’t see) and access to commercial-grade sealing materials.
DIY vs Professional — Which Is Better for Melbourne Homes?
| Approach | Cost | Best For | Limitations |
|---|---|---|---|
| DIY (doors + windows) | $80–$300 | Budget-conscious homeowners, rental properties | Easy to miss hidden gaps; foam tape wears after 2–3 years |
| DIY + blower door rental | $200–$500 | Thorough DIYers who want to measure results | Blower door hire limited availability in Melbourne |
| Professional service | $400–$1,200 | Older homes, high energy bills, VEU rebate eligible | Higher upfront cost; quality varies by provider |
Common Draught Sources in Melbourne Homes
| Location | Typical Gap Size | Best Seal | DIY Difficulty |
|---|---|---|---|
| Under external doors | 5–15mm | Door bottom sweep | Easy |
| Door frame sides (stop bead) | 1–3mm | Compression foam or V-strip | Easy |
| Sash windows (between sashes) | 2–5mm | V-strip bronze weatherstrip | Moderate |
| Floorboard/skirting junction | 1–8mm | Flexible silicone sealant | Easy |
| Ceiling exhaust fans | Whole opening | Ceiling-mount draught stopper | Easy |
| Fireplace/chimney (unused) | Whole opening | Chimney balloon or wool plug | Easy |
| Subfloor — under suspended timber floor | Multiple points | Draught board + insulation batts | Hard — may need professional |
Signs You Need Draught-Proofing
- You can feel cold air moving across the floor on still, cold days
- Rooms that face west or south are significantly colder than others
- Your heating runs constantly but rooms still feel cold
- You notice curtains or door snakes moving when no windows are open
- Energy bills spike significantly from April to September
- You can see light under external doors from inside the home
Top Tips and Gotchas
- Test first, seal second. On a cold, windy day, hold a stick of incense around door frames, window edges, power points, and skirting boards. Moving smoke reveals draught sources you can’t feel by hand.
- Don’t seal subfloor vents. Airbricks and subfloor vents are intentional — they prevent timber rot and moisture buildup. Never block them. Only seal the gaps where subfloor air enters the living space (through floorboards and skirting).
- Foam tape has a 2–3 year lifespan. Cheap self-adhesive foam compresses and loses its seal. Replace it every few years or upgrade to compression rubber or V-strip for longer-lasting results.
- Exhaust fans are a hidden heat thief. Every bathroom and laundry exhaust fan is a hole in your ceiling that runs cold air straight through in winter. Fit a ceiling-mount draught stopper — it closes automatically when the fan isn’t running.
- Check the VEU rebate first. Accredited draught-proofing under the Victorian Energy Upgrades program may qualify for subsidised pricing. The rebate varies by home size and location.
- Seal, then insulate. Draught-proofing and ceiling insulation work together. If you’re planning both, draught-proof first — sealing gaps makes insulation more effective.
- Unused fireplaces are major culprits. An open chimney is like a hole in your ceiling. Fit a chimney balloon (a deflated device you inflate inside the flue) to block the draught while keeping the chimney functional.
- Don’t seal too tight in wet areas. Bathrooms and kitchens need some ventilation for moisture control. Focus draught-proofing on living areas and bedrooms rather than making wet rooms airtight.
Local Melbourne Resources
- Victorian Energy Upgrades (VEU) — Draught Sealing Rebates
- Bunnings — Weatherstripping & Draught Excluders
- Mitre 10 — Weatherstripping & Door Seals
- Sustainability Victoria — Draught Proofing Guide
FAQ
How much can I save by draught-proofing my Melbourne home?
Most Melbourne homeowners save $150–$400 per year on heating and cooling after professional draught-proofing. Older homes on stumps in suburbs like Berwick and Pakenham can save even more, particularly if combined with ceiling insulation and underfloor draught sealing.
Is draught-proofing worth it in Melbourne?
Yes — Melbourne’s climate makes it one of the highest-return energy investments available. Cold winters mean draught-proofing pays back within 1–3 years and then delivers free savings every year after. Combined with the VEU rebate, the payback period can drop to under 12 months.
Can I draught-proof my home myself?
Yes for most common draught points — door sweeps, foam tape, V-strip for windows, and silicone for skirting board gaps are all DIY-accessible. Subfloor sealing and chimney balloons are also DIY-friendly. Professional blower-door testing is the main thing DIYers can’t easily replicate.
Should I draught-proof a rental property in Victoria?
Since 2023, Victorian rental minimum standards include draught-proofing requirements for external door seals. Landlords may be required to maintain or install draught seals — check the Residential Tenancies Act 2018 or consult Consumer Affairs Victoria for current obligations.
Can I block subfloor vents to reduce draughts?
No — never block subfloor airbricks or foundation vents. They’re essential for subfloor ventilation to prevent timber rot and mould. Instead, seal the gaps where subfloor air enters the living space — under skirting boards, around pipes, and through floorboard gaps.
Final Thoughts
Draught-proofing is the unsexy but highly effective home upgrade that Melbourne winters demand. A weekend with $100–$200 in materials from Bunnings or Mitre 10 can meaningfully cut heating bills from May to September — and a professional service, especially one covered by a VEU rebate, pays for itself in a couple of cold winters. Start with the obvious culprits: the bottom of your external doors, the exhaust fans in your bathroom and laundry, and the gaps along your skirting boards.