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Aluminium Window Frame Replacement Cost: Complete Guide for SA Homeowners
🪟 From old timber to modern aluminium – everything you need to know about replacing window frames
Let me tell you something I’ve learned after hundreds of window replacement projects across Gauteng, Johannesburg, and Pretoria. Replacing old window frames is one of the best investments you can make in your home. New aluminium frames improve security, energy efficiency, curb appeal, and property value. But the cost question always comes first.
Here’s the honest truth about aluminium window frame replacement cost in South Africa. For a standard-sized window (1.2m x 1.2m), expect to pay R3,500 – R7,500 for a complete replacement including frame, glass, and installation. That’s for the window itself. The old frame removal and disposal add R500 – R1,500 per window.
In this complete guide to replace window frame costs, I’ll break down exactly what affects how much to replace aluminium window frames. You’ll learn about size-based pricing, glass options, removal costs, provincial variations, and hidden fees to watch out for. By the end, you’ll know exactly what a fair frame replacement budget looks like for your home.
For more aluminium guidance, check out our aluminium services, read our installation cost guide, or compare aluminium vs uPVC vs wood. Ready to understand window frame replacement pricing? Let’s dive in.
📋 Table of Contents – Window Frame Replacement Cost Guide
💰 Average Aluminium Window Frame Replacement Costs
Here’s what you can expect to pay for aluminium window frame replacement cost for different window types and qualities.
| Window Type | Budget Replacement | Standard Replacement | Premium Replacement | Typical Size |
|---|---|---|---|---|
| Small window (600x600mm) | R2,500 – R3,500+RSU | R3,500 – R5,000+RSU | R5,000 – R7,500+RSU | Bathroom, toilet, passage |
| Standard window (1.2m x 1.2m) | R3,500 – R5,000+RSU | R5,000 – R7,500+RSU | R7,500 – R11,000+RSU | Bedroom, living room |
| Large window (1.8m x 1.2m) | R5,000 – R7,500+RSU | R7,500 – R11,000+RSU | R11,000 – R16,000+RSU | Kitchen, dining room, lounge |
| Sliding window (2.4m x 1.2m) | R7,000 – R10,000+RSU | R10,000 – R15,000+RSU | R15,000 – R22,000+RSU | Patio, large openings |
What’s included in these prices:
- New aluminium window frame (standard profile, standard colour – white or silver)
- 4mm single glazing (standard glass)
- Basic hardware (handles, hinges, friction stays for casement windows)
- Professional installation in existing opening
- Basic sealing and finishing
- Removal and disposal of old frame is usually extra – see section 4
According to SANS 10400 replacement standards and SABS frame material standards, replacement windows must meet current safety and energy regulations.
📏 Cost Breakdown by Window Size
Window size is the biggest factor in window frame replacement price. Here’s a detailed breakdown per square metre.
| Window Size (approx) | Area (m²) | Cost per m² | Total Replacement Cost | Notes |
|---|---|---|---|---|
| Very small (0.6m x 0.6m) | 0.36m²+RSU | R7,000 – R10,000+RSU | R2,500 – R3,500+RSU | High per m² due to fixed overheads+- |
| Small (0.9m x 0.9m) | 0.81m²+RSU | R5,500 – R7,500+RSU | R4,500 – R6,000+RSU | Standard bathroom or toilet+ |
| Standard (1.2m x 1.2m) | 1.44m²+RSU | R3,500 – R5,200+RSU | R5,000 – R7,500+RSU | Best value – most common size+/u |
| Large (1.8m x 1.2m) | 2.16m²+RSU | R3,200 – R5,000+RSU | R7,000 – R11,000+RSU | Lower per m² rates+ |
| X-Large (2.4m x 1.2m) | 2.88m²+RSU | R3,000 – R4,800+RSU | R8,500 – R14,000+RSU | Sliding windows common here+- |
Size observation: Very small windows have higher per-square-metre costs because fabrication setup and installation overheads are fixed. Standard-sized windows (1.2m x 1.2m) offer the best value.
🗺️ Aluminium Window Frame Replacement Costs by Province
How much to replace aluminium window frames varies significantly across South Africa.
| Province | Standard Window (1.2m x 1.2m) | Large Window (1.8m x 1.2m) | Notes |
|---|---|---|---|
| Gauteng | R5,000 – R7,000+RSU | R7,500 – R10,500+RSU | Most competitive pricing due to many aluminium fabricators |
| Western Cape | R5,500 – R7,800+RSU | R8,500 – R12,000+RSU | Higher labour and transport costs in Cape Town region |
| KwaZulu-Natal | R5,200 – R7,400+RSU | R7,800 – R11,000+RSU | Durban coastal corrosion protection sometimes required |
| Eastern Cape | R5,000 – R7,200+RSU | R7,500 – R10,800+RSU | Moderate pricing depending on installer availability |
| Free State | R4,800 – R6,800+RSU | R7,200 – R10,000+RSU | Lower labour costs compared to coastal provinces |
| Limpopo | R4,800 – R6,700+RSU | R7,000 – R9,800+RSU | Prices depend on travel distance to installers |
| Mpumalanga | R4,900 – R6,900+RSU | R7,200 – R10,200+RSU | Similar rates to Gauteng but fewer suppliers |
| North West | R4,800 – R6,700+RSU | R7,000 – R9,800+RSU | Generally slightly cheaper than Gauteng |
| Northern Cape | R5,200 – R7,400+RSU | R7,800 – R11,200+RSU | Higher transport costs due to remote locations |
If you’re in Gauteng, you’ll find the lowest aluminium window frame replacement cost. Johannesburg offers the most competitive market.
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🗑️ Old Frame Removal & Disposal Costs
This is the hidden cost that catches many homeowners off guard. Here’s what to budget for replace window frame removal.
Removal and disposal costs by frame type:
- Timber frame removal: R300 – R600 per window – relatively easy to remove and dispose of; some timber can be recycled
- Steel frame removal: R500 – R1,000 per window – heavier, may require cutting, disposal costs higher
- Old aluminium frame removal: R300 – R600 per window – easier to remove, aluminium can be recycled (some fabricators credit you for scrap value)
- Frame disposal (skip/bin fees): R200 – R500 per window if fabricator doesn’t include disposal
- Asbestos frame removal: R1,500 – R3,000+ per window – requires specialist removal (older homes may have asbestos-containing materials)
Pro tip: Ask fabricators if they include removal and disposal in their quote. Some do, some don’t. Get this clarified before signing. Old aluminium frames have scrap value – reputable fabricators will often remove them at no cost or give you a small credit.
🎁 Pro Tip: Ask About Scrap Value Credit
Old aluminium frames have scrap value. When getting quotes for aluminium window frame replacement cost, ask fabricators if they’ll deduct the scrap value from your total. For a full house replacement (15-20 windows), scrap value could be R1,000 – R3,000. Not all fabricators offer this, but it’s worth asking.
🔩 Steel to Aluminium Conversion – Special Case
Many older South African homes have steel window frames that rust, don’t seal properly, and look dated. Converting to aluminium is one of the most common frame replacement projects.
Additional costs for steel-to-aluminium conversion:
- Steel frames are heavier and harder to remove – add R200 – R500 per window for removal labour
- Opening may need to be squared – old steel frames often pull out of square; add R300 – R800 per window for masonry adjustments
- Fixing points may need modification – steel frame fixing points differ from aluminium; add R200 – R500 per window
- Plaster repair around openings – steel frames are often recessed differently; add R300 – R800 per window for plastering
- Total premium for steel conversion: Typically R1,000 – R2,500 per window extra
Typical cost for steel to aluminium conversion per standard window: R6,000 – R10,000 fully installed including removal, adjustments, and finishing.
For a detailed breakdown, read our steel to aluminium conversion guide.
🪟 Glass Upgrade Costs During Frame Replacement
When replacing frames, it’s the perfect time to upgrade your glass. Here’s how different options affect window frame replacement price.
| Glass Upgrade | Cost Premium (per m²) | Standard Window Premium | Energy Savings | Noise Reduction |
|---|---|---|---|---|
| 4mm to 5mm single glazeth-> | +R150 – R300+? | +R200 – R450+RSU | Fair+? | Fair+? |
| 4mm to Double glazing (4+4mm) | +R900 – R1,500+RSU | +R1,300 – R2,200+RSU | Excellent 40-60%+? | Excellent+? |
| 4mm to Low-E coated glass+? | +R400 – R800+RSU | +R600 – R1,200+RSU | Excellent+? | Good+ |
| 4mm to laminated safety glass+? | +R350 – R700+RSU | +R500 – R1,000+RSU | Good+? | Very Good+? |
For a complete guide to glass options, read our installation cost guide.
🛠️ Installation & Labour Costs Breakdown
Labour is a significant portion of aluminium window frame replacement cost. Here’s what you’re paying for.
Labour cost breakdown per standard window:
- Removal of old frame: R500 – R1,000 – includes careful removal to minimise wall damage
- Opening preparation: R400 – R800 – cleaning, squaring, repairing damaged masonry
- New frame fitting: R1,000 – R1,800 – positioning, levelling, fixing into opening
- Sealing and waterproofing: R300 – R600 – foam sealant, silicone, weather strips
- Finishing and cleanup: R200 – R400 – plaster touch-up, debris removal
- Total labour per window: R2,400 – R4,600 (excludes frame cost)
Time required per window:
- Removal: 30-60 minutes
- Installation: 1-2 hours
- Finishing: 30 minutes
- Total per window: 2-4 hours
For a full house with 15 windows, expect 30-60 total labour hours spread over 3-5 days.
🏠 Full House Window Frame Replacement – Realistic Budgets
Here’s what to budget for replacing all windows in different house sizes.
| House Size | Approx Window Count | Standard Replacement (Budget) | Standard Replacement (Quality) | Premium (Thermal + Double Glaze) |
|---|---|---|---|---|
| Small house (2-bed, 1-bath) | 6 – 8 windows | R25,000 – R35,000 | R35,000 – R50,000 | R50,000 – R75,000 |
| Medium house (3-bed, 2-bath) | 12 – 15 windows | R50,000 – R70,000 | R70,000 – R100,000 | R100,000 – R150,000 |
| Large house (4–5 bed, 3+ bath) | 18 – 25 windows | R75,000 – R110,000 | R110,000 – R170,000 | R160,000 – R250,000 |
These are approximate budgets for standard aluminium frames with 4mm glass and basic hardware, including removal, disposal, and installation. Premium options (thermal break profiles, double glazing, custom colours) add significantly to the cost.
⚠️ Hidden Costs to Watch Out For
⚠️ Warning: These Hidden Costs Inflate Your Window Frame Replacement Price
Always ask for a detailed breakdown when comparing aluminium window frame replacement cost quotes.
- Removal and disposal not included: Many quotes are for supply and install only – removal of old frames is extra. Always ask: “Does this include removing the old frames and disposing of them?”
- Plaster repair: Removing old frames often damages surrounding plaster. Many quotes exclude plaster repair – add R300 – R800 per window.
- Window sills: Internal window sills may need replacement – add R200 – R500 per window for new sills.
- Lintel repairs: Old windows may have damaged or rusted lintels above – add R1,000 – R3,000 per window if replacement needed.
- Custom colours (powder coating): Standard white or silver included. Custom colours add 20-35% to frame cost.
- Non-standard sizes: Custom size windows add 15-30% to fabrication costs.
- Access equipment: Second-floor windows may need scaffolding – add R2,000 – R6,000 total.
- Building inspections: Some areas require municipal inspection for window replacement – clarify if this cost is yours (R500 – R1,500).
- After-hours work: Weekend or evening installation adds 25-50% to labour costs.
- Emergency replacement: Urgent replacements (e.g., broken window, security risk) carry premium pricing – often +30-50%.
For a complete checklist, read our maintenance guide and buying checklist.
🔍 Signs You Need to Replace Window Frames (Not Just Repair)
Before investing in aluminium window frame replacement cost, make sure replacement is necessary.
- Visible rot or decay: Timber frames with soft, crumbling wood – not fixable with putty alone
- Rust perforation: Steel frames with holes rusted through – structural integrity compromised
- Persistent drafts: If you feel air movement around closed windows, seals have failed and frames may be warped
- Condensation between double glazing: Seals have failed – only replacement fixes this
- Difficulty opening/closing: Warped frames or failed hardware that adjustment can’t fix
- Water damage on walls below windows: Frames are leaking – replacement often cheaper than repeated repairs
- Single glazing in cold area: Not a failure, but upgrading to double glazing during frame replacement saves money long-term
If only hardware is broken, read our window not closing fix guide or repair services before committing to full replacement.
📊 Complete Aluminium Window Frame Replacement Cost Table
Use this as your final reference when comparing window frame replacement price quotes.
| Service Component | Standard Window (1.2m x 1.2m) | Large Window (1.8m x 1.2m) | Sliding Window (2.4m x 1.2m) |
|---|---|---|---|
| Frame & glass (supply only) | R2,800 – R4,500+RSU | R4,500 – R7,000+RSU | R6,000 – R10,000+RSU |
| Removal of old frame | R500 – R800+RSU | R700 – R1,000+RSU | R900 – R1,500+RSU |
| Installation labour | R1,500 – R2,500+RSU | R2,000 – R3,500+RSU | R3,000 – R5,000+RSU |
| Sealing & finishing | R300 – R500+RSU | R400 – R700+RSU | R500 – R1,000+RSU |
| Plaster repair (if needed) | R300 – R600+RSU | R400 – R800+RSU | R500 – R1,000+RSU |
| Total replacement cost | R5,400 – R8,900+RSU | R8,000 – R13,000+RSU | R10,900 – R18,500+RSU |
❓ Frequently Asked Questions About Aluminium Window Frame Replacement
How much does it cost to replace an aluminium window frame in South Africa?
Aluminium window frame replacement cost for a standard window (1.2m x 1.2m) ranges from R5,000 – R8,500 fully installed including removal of the old frame. Large windows cost R8,000 – R13,000, and sliding windows cost R11,000 – R18,500. For premium thermal break or double glazing, add 30-50% to these prices.
Is it cheaper to replace just the frame or the whole window?
For aluminium windows, replacing the whole window (frame + glass) is almost always the better option. The glass is a small portion of the total cost (10-15%), and new glass ensures proper sealing and energy efficiency. The answer to how much to replace aluminium window frames is typically R5,000 – R8,500 for a complete replacement, while frame-only replacement (reusing old glass) saves only R500 – R1,000 but risks poor sealing and future issues.
How long does it take to replace a window frame?
A professional installer can replace a standard window frame in 2-4 hours including removal, installation, sealing, and cleanup. For a full house with 15 windows, expect 3-5 days total. Factors affecting time: old frame type (steel takes longer than timber), access difficulty, and weather conditions (sealing requires dry conditions).
Do I need plans or permission to replace window frames?
In most cases, replacing window frames with the same size openings doesn’t require building plans. However, if you’re changing the size, adding new windows, or the property is in a heritage area, you may need municipal approval. Always check with your local municipality. Read our buying checklist for regulatory guidance.
Can I replace window frames myself to save money?
DIY window frame replacement is not recommended unless you have significant construction experience. Incorrect installation leads to air leaks, water damage, security risks, and voided warranties. Professional installation costs R2,000 – R4,000 per window – worth it for peace of mind. Use our aluminium services to find verified professionals.
What’s the difference between retrofitting and new build installation?
Retrofit replacement (removing old frames and fitting new ones into existing openings) costs 20-40% more than new build installation because of removal labour, opening preparation, and potential repairs. For a standard window, retrofitting costs R5,000 – R8,500 vs R3,500 – R5,500 for new build. Most home replacements are retrofits. For more details, read our replacement guide.
How can I get the best price for window frame replacement?
To get the best window frame replacement price: 1) Get quotes from at least 3 fabricators via ServiceLink SA’s free service. 2) Replace all windows at once for volume discount. 3) Choose standard sizes and colours. 4) Ask about scrap value credit for old aluminium frames. 5) Use our Beat Your Quote guarantee. 6) Schedule during off-peak season (winter for indoor work).
Is double glazing worth it during frame replacement?
Yes, if you plan to stay in your home for 5+ years. Double glazing adds R1,300 – R2,200 per standard window but reduces heating/cooling costs by 40-60% and significantly reduces noise. For homes in noisy areas or cold climates (Gauteng, Free State, Mpumalanga highveld), double glazing pays back in 3-7 years. Read our installation cost guide for more.
✅ Final Thoughts: Frame Replacement Transforms Your Home
Understanding aluminium window frame replacement cost helps you budget for one of the most impactful home improvements you can make.
Yes, replacement costs real money – R5,000 – R8,500 per standard window, R50,000 – R100,000+ for a full house. But new aluminium frames eliminate drafts, stop water leaks, improve security, reduce energy bills, and transform curb appeal. Unlike other renovations that are purely cosmetic, window frame replacement delivers practical benefits you’ll notice every single day.
Key takeaways for window frame replacement:
- Budget R5,000 – R8,500 per standard window fully installed (including removal)
- Gauteng offers the most competitive pricing
- Steel-to-aluminium conversion adds R1,000 – R2,500 per window
- Removal and disposal is often extra – always ask if included
- Double glazing adds R1,300 – R2,200 per standard window but pays back in energy savings
- Full house replacement for a medium home costs R70,000 – R100,000 for quality standard frames
- Hidden costs include plaster repair, lintel repairs, and scaffolding
- Old aluminium frames have scrap value – ask for credit
- Use ServiceLink SA to find verified fabricators and compare quotes
Your next step: Ready to replace your old window frames? Get free quotes from verified aluminium fabricators in your area.
Ready to Replace Your Old Window Frames?
Get free, no-obligation quotes from verified aluminium fabricators. Compare aluminium window frame replacement cost options and find the best value for your home.
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📚 Official resources & standards referenced:
- SANS 10400 – South African National Standard for window replacement standards and building regulations.
- SABS – South African Bureau of Standards for frame material standards and quality certification.
Information provided for general guidance based on industry research. Prices vary by location, quality, and market conditions. Always get multiple quotes for your specific project.
Written by: ServiceLink SA Research Team
Specialist Aluminium Window & Home Renovation Experts
The ServiceLink SA Research Team has extensive experience with aluminium window frame replacements across thousands of South African homes. Our team has worked closely with certified fabricators, removal specialists, and homeowners to develop accurate pricing benchmarks for frame replacement projects. This guide is based on real project data, fabricator quotes, and installation feedback from across Gauteng, Johannesburg, Pretoria, Sandton, Centurion, and nationwide. We update our pricing information regularly to reflect current market conditions and material costs.
For more information about aluminium window frame replacement, explore our related resources: aluminium window installation costs, steel to aluminium conversion, maintenance guide, and material comparison. Learn about our process on what is ServiceLink SA and how we verify contractors. Find fabricators in your area: Gauteng, Johannesburg, Pretoria, Sandton, Centurion, and Midrand. For related services, see our roofing services and waterproofing guides.