Aluminium Window Prices

Aluminium window prices in South Africa vary according to the window type, size, opening configuration, glass and finish you choose. At Sigmadoors, we offer a wide range of standard and custom aluminium windows for new homes, renovations and commercial projects across South Africa, with a strong service and delivery presence in Gauteng, including Johannesburg and Pretoria. Whether you are comparing top-hung aluminium window prices, sliding windows, side-hung windows or custom-made windows, choosing the right window type can help you balance price, ventilation, natural light and architectural style.

Aluminium Window Prices by Size

As a general guide, Sigmadoors aluminium window prices can be grouped into three broad size categories:

Window Size Category	Typical Width	Price Range
Small Aluminium Windows	600–900mm	R1,100 – R4,000
Medium Aluminium Windows	1200–1800mm	R1,600 – R6,200
Large Aluminium Windows	1800–2400mm+	R2,500 – R7,900+
Custom / Oversized Windows	Made to order	Quoted individually

Small Aluminium Windows — R1,100 to R4,000

Small aluminium windows typically include widths from approximately 600mm to 900mm and are commonly used for bathrooms, kitchens, sculleries and other compact spaces.

Depending on whether you choose a top-hung, side-hung or horizontal sliding configuration, Sigmadoors prices generally range from approximately R1,100 to R4,000.

Medium Aluminium Windows — R1,600 to R6,200

Medium windows, generally between 1200mm and 1800mm wide, are popular for bedrooms, kitchens, studies and living areas.

Across Sigmadoors’ different aluminium window ranges, prices typically fall between approximately R1,600 and R6,200, depending on the size and window type.

Large Aluminium Windows — R2,500 to R7,900+

Large aluminium windows from approximately 1800mm to 2400mm and wider are commonly used for lounges, dining areas, large bedrooms and feature glazing.

Depending on the size and configuration, Sigmadoors prices generally range from approximately R2,500 to R7,900 or more.

Why Do the Price Ranges Overlap?

Window size is only one factor affecting the price. A smaller horizontal sliding window, for example, can cost more than a larger top-hung window because the two windows use different aluminium systems, hardware and operating mechanisms.

The final aluminium window price can also vary according to the glass type, frame colour, number of opening sections and selected configuration.

Prices above are indicative. For current prices, refer to the individual Sigmadoors product listings.

Need a Quick Window Quote?

Send us your window sizes, window schedule or architectural plans

info@sigmadoors.co.za or call 065 841 6248

Cheaper Windows & the Aluminium Profile Quality

When comparing aluminium window prices, it is important to look beyond the window size and price tag. Two windows with the same dimensions and similar style can differ significantly in the aluminium profiles, hardware and overall construction used to manufacture them.

For Sigmadoors’ top-hung and side-hung windows, the 30.5mm profile offers a combination of:

• More substantial profile proportions
• Elegant appearance on modern homes
• Strong, robust window construction
• Well-balanced fixed and opening sections
• Clean contemporary architectural lines
• A premium finished appearance

At Sigmadoors, we believe customers should compare quality and specification as well as price.

30.5mm vs 28mm Top-Hung & Side-Hung Window Profiles

For top-hung and side-hung aluminium windows, profile size is an important consideration when comparing products from different suppliers.

Many standard top-hung and side-hung windows are manufactured using approximately 28mm profiles. Sigmadoors uses a more substantial 30.5mm aluminium profile for these window ranges, providing a stronger and more robust window construction.

It is important to note that the 30.5mm versus 28mm comparison relates specifically to Sigmadoors’ top-hung and side-hung aluminium windows.

Aluminium Price List – Standard Aluminium Window Sizes & Prices

Looking for aluminium window prices before you buy? Use the Sigmadoors aluminium window price list below to quickly compare our popular standard aluminium window sizes and prices, choose the right configuration and buy your windows online.

Whether you need one window for a renovation or multiple windows for a new home or building project, our standard-size range makes it easy to check the size, compare the price and order online.

Can’t find the size you need? Sigmadoors also manufactures custom aluminium windows to your required dimensions and configuration.

Standard Top-Hung Aluminium Window Price List (2026)

Ready to buy top-hung aluminium windows? Compare the latest Sigmadoors top-hung aluminium window prices and sizes below and choose the windows that suit your project and budget.

Our range includes smaller windows for bathrooms and utility areas through to larger top-hung and combination windows for kitchens, bedrooms and living areas.

Sigmadoors top-hung windows are manufactured using our 30.5mm aluminium window profile, giving them strong, well-balanced proportions and an elegant appearance particularly suited to modern homes.

Choose your size, check the price and buy your aluminium windows online.

Shop Top-Hung Aluminium Windows →

Standard Side-Hung Aluminium Window Price List (2026)

The side-hung aluminium window price list below provides standard sizes and prices for windows with outward-opening side-hung sashes. Also commonly referred to as aluminium casement windows, these windows are an excellent choice where generous ventilation and a clean contemporary appearance are required.

Like our top-hung range, Sigmadoors side-hung windows use a 30.5mm aluminium profile, providing attractive proportions for modern residential architecture.

Compare the available side-hung aluminium window sizes and prices below, or request a custom quotation if your project requires a different size or configuration.

Standard Horizontal Aluminium Sliding Windows Price List 2026

Compare the latest Sigmadoors horizontal aluminium sliding window prices and standard sizes for 2026. Our Icon Series sliding windows offer a practical, space-saving window solution for modern homes, renovations and building projects.

Horizontal sliding windows are easy to operate, provide excellent ventilation and require no outward or inward opening space, making them particularly suitable for kitchens, bedrooms, bathrooms and areas where space is limited.

Use this price list to compare aluminium sliding window sizes and prices and find the right option for your project. Prices shown are indicative; final prices are as published on the Sigmadoors online store.

Can’t find the size you need? Custom horizontal sliding aluminium windows can also be manufactured to your required sizes and specifications.

Need a Quick Quote for Custom Sizes?

Send us your window sizes, window schedule or architectural plans

info@sigmadoors.co.za or call 065 841 6248

Typical Aluminium Window Installation Labour Costs

The prices below provide a general indication of installation labour costs per window. They are separate from the cost of the aluminium window itself.

Aluminium Window Type	Typical Installation Labour Cost
Top-Hung Aluminium Window	R450 – R950 per window
Side-Hung Aluminium Window	R450 – R950 per window
Horizontal Sliding Window	R650 – R1,100 per window
Fixed Aluminium Window	R450 – R850 per window
Combination Aluminium Window	R850 – R1,400 per window
Large / Oversized Aluminium Windows	R1,200 – R2,500+ per window
Custom Aluminium Window	Quoted according to size and complexity

What Affects Installation Labour Costs?

Installation costs may vary according to the window size and weight, number of windows, installation height, site access, project location and condition of the window openings.

The above rates generally assume installation into properly prepared window openings with normal access.

Removal of existing windows, scaffolding, lifting equipment, brickwork, plaster repairs, painting and other building work are normally quoted separately.

Important: These prices are indicative averages only. Final installation labour costs should be confirmed after reviewing the window sizes, quantities and site conditions.

What Affects Aluminium Window Prices?

Aluminium window prices can vary considerably, even between windows that appear similar in size. The final cost depends on the window size, aluminium profile, window type and configuration, glass selection, frame colour, hardware and whether the window is a standard or custom-made size.

Understanding these factors makes it easier to compare aluminium window prices and choose the right windows for your home or building project. 

Factors affecting aluminium window prices are as follows:

1. Aluminium Window Size

The size of the aluminium window is one of the biggest factors affecting its price. Larger windows require more aluminium, more glass and, in some cases, additional mullions or structural sections.

A small 600 × 600mm bathroom window will therefore generally cost considerably less than a 2400 × 1800mm window designed for a lounge or bedroom.

Where possible, compare our standard aluminium window sizes and prices to find a size suitable for your opening and budget.

2. Type of Aluminium Window

Different types of aluminium windows use different frames, sashes, tracks, hardware and operating mechanisms, which affects their cost.

Common options include:

• Top-hung aluminium windows
• Side-hung aluminium windows
• Horizontal sliding aluminium windows
• Cottage pane windows
• Fixed aluminium windows
• Combination windows
• Custom aluminium windows

A simple fixed window will normally cost less than an opening window of a similar size, while larger combination windows with several fixed and opening sections generally cost more.

3. Aluminium Profile and Window System

The aluminium profile used to manufacture the window affects its appearance, strength and price.

For example, Sigmadoors’ top-hung and side-hung aluminium windows use the 30.5mm Casement system, providing robust construction with well-balanced frame and sash proportions suited to contemporary homes.

Horizontal sliding windows use a different aluminium window system specifically designed to accommodate sliding panels, tracks and rollers.

When comparing aluminium window frame prices, it is therefore important to compare more than just the overall window dimensions.

4. Glass Type

Your choice of glass can have a significant effect on the final aluminium window price.

Standard clear glass is generally the most economical option. Depending on your requirements, you may also choose:

• Clear safety glass
• Obscure/Frosted glass
• Arctic Snow privacy glass
• S10 Bronze reflective glass
• S10 Grey reflective glass
• S10 Silver reflective glass
• Low E energy rated glass
• Double Glazing units
• Other specialised glazing

Privacy, safety, solar-control and reflective glass options generally cost more than standard clear glazing.

5. Aluminium Window Colour

The selected aluminium window colour can also affect the price.

Sigmadoors windows are available in popular finishes including Natural Anodised (Silver), White, Bronze, Charcoal and Black. Pricing may also be affected for other custom powder-coated finishes and according to the particular window system selected.

6. Fixed vs Opening Sections

The number of opening sections or sashes affects the amount of aluminium and hardware required.

A fixed pane has no hinges, friction stays, handles or opening sash. A top-hung or side-hung window requires additional framing and operating hardware.

A large combination window containing several opening sashes will therefore generally cost more than a fixed window of the same overall size.

7. Standard vs Custom Aluminium Window Sizes

Choosing one of our standard aluminium window sizes is often the most economical option because these windows form part of our established product range.

If your architectural design requires a different width, height or configuration, Sigmadoors can manufacture custom aluminium windows to your required dimensions and specifications.

Custom window prices depend on the size, configuration, glass, colour and hardware required.

8. Hardware and Accessories

Handles, locks, friction stays, rollers, tracks, weather seals and other components vary according to the type of window.

For example, horizontal sliding windows require a track and roller system, while casement windows use hinges or friction stays to operate the opening sash.

The quality and quantity of these components contribute to the final aluminium window price.

9. Quantity of Windows

The total number of windows required can affect the overall project cost.

A homeowner replacing one or two windows has different manufacturing, delivery and installation requirements from a new-build project requiring a complete aluminium window package.

For larger projects, send us your window schedule or architectural plans so that the complete requirement can be priced together.

10. Delivery and Installation Costs

The prices of the windows themselves should also be distinguished from aluminium window installation costs.

Installation labour can vary according to the size and weight of the windows, number of units, project location, floor level, accessibility and condition of the prepared openings.

Replacement projects may cost more where existing windows need to be removed.

Compare Aluminium Window Prices Before You Buy

When researching aluminium window prices in South Africa, you may compare prices from specialist aluminium window manufacturers such as Sigmadoors with aluminium windows available from major building-material retailers such as Cashbuild and Build It.

When comparing prices, make sure you are comparing similar window sizes and specifications. Consider the aluminium profile, window configuration, glass type, hardware, frame finish and what is included with the window—not just the advertised price.

Sigmadoors offers a wide range of standard aluminium windows with prices available online, making it easy to compare sizes, configurations and costs before ordering. Custom sizes and configurations can also be manufactured for projects where standard windows are not suitable.

Aluminium Window Prices & SANS 10400 Requirements

When comparing aluminium window prices, it is important to consider applicable SANS 10400 building requirements, as the size, position and application of a window can affect the required glass type, glass thickness, safety glazing and overall specification. Larger panes or windows in certain locations may require safety or specialised glazing, which can increase the final price. Energy-efficiency requirements under SANS 10400-XA may also influence the glazing specification on certain projects. For this reason, the cheapest window is not always the appropriate option; the final window and glass specification should be suitable for its intended application and comply with applicable South African building regulations.

Need Help to Choose the Right Window for your Project?

Send us your window sizes, window schedule or architectural plans

info@sigmadoors.co.za or call 065 841 6248

Buying Sigmadoors Aluminium Windows Online

Buying aluminium windows online should be convenient, transparent and supported. At Sigmadoors, we make it easier to compare aluminium window prices, select your windows, order securely and have them delivered directly to your project.

Here are some of the benefits of buying Sigmadoors aluminium windows online:

1. Secure Online Ordering

Order your aluminium windows conveniently through our secure online store. Select your window size, configuration and available options, add them to your cart and complete your purchase online.

2. Clear Lead Times & Delivery Tracking

Know what to expect after placing your order. We provide clear manufacturing lead times and keep you informed about the progress and delivery of your windows.

3. Online Discounts

Take advantage of special online prices, discounts and promotions available on selected aluminium windows. Buying online also makes it easy to compare window sizes and prices before placing your order.

4. Delivery to Your Project

Sigmadoors can arrange delivery of your aluminium windows directly to your home, building site or project location, subject to our delivery areas and applicable delivery charges.

5. Measuring Guide

Getting the size right is important. Our aluminium window measuring guide helps you understand how to measure your window openings correctly before ordering.

For larger or more complex projects, you can also send us your window schedule or architectural plans for assistance.

aluminium window measuring guide →

6. Installation Aids

We make installation easier for homeowners, builders and installers.

Top-hung and side-hung aluminium windows are supplied with fixing lugs to assist with securing the frames into prepared openings.

Our windows are also DIY-friendly, and fitting diagrams can be provided on request to help guide the installation process.

7. Telephonic Support from Our Experienced Team

Buying online doesn’t mean you have to make every decision on your own. Our experienced team is available by telephone to assist with window sizes, configurations, glass options, colours, ordering and general product questions.

Buy Aluminium Windows Online with Confidence

From comparing aluminium window sizes and prices to ordering, delivery and installation support, Sigmadoors gives you the convenience of buying aluminium windows online with the added support of an experienced aluminium window team.

Shop Aluminium Windows Online

Need Help Choosing? Contact Our Team

info@sigmadoors.co.za or call 065 841 6248

Frequently Asked Questions About Aluminium Windows

1. Do You Supply Aluminium Windows to the Public?

Yes. Sigmadoors supplies aluminium windows directly to homeowners, builders, contractors, developers and other trade customers. You can buy standard aluminium windows through our online store or request a quotation for larger and custom projects.

2. How Long Does Delivery Take?

Our minimum delivery lead time is generally about 7 days. However, delivery times may vary depending on the window type, order quantity, selected colour and glass options, manufacturing requirements and delivery location. The estimated lead time will be confirmed when your order is processed, and we will keep you updated on the progress and delivery of your order.

3. Is Installation Included in the Aluminium Window Price?

No. Unless specifically stated otherwise, the aluminium window prices shown online are supply-only prices. Installation can be quoted separately depending on the number and size of windows, project location, accessibility and site conditions.

4. Do You Deliver Aluminium Windows to Other Provinces?

Yes. Sigmadoors supplies and delivers aluminium windows throughout Gauteng, including Johannesburg, Pretoria, Midrand, Centurion, Randburg, Sandton and surrounding areas. Delivery to other provinces can also be arranged depending on the order size and destination. Contact us with your delivery location for confirmation and a delivery quotation.

5. What Type of Glass Is Supplied with the Windows?

Our standard aluminium windows are generally supplied with clear glass. Depending on the window and your requirements, alternative glass options such as frosted, Arctic Snow privacy glass and S10 reflective glass may also be available at an additional cost.

The appropriate glass thickness and safety-glazing requirements may vary according to the window size, position and application, in accordance with applicable building regulations.

6. Can I Get a Quote for Custom Aluminium Window Sizes?

Yes. In addition to our standard aluminium window sizes, Sigmadoors manufactures custom aluminium windows to your required dimensions and configuration.

Send us your window sizes, window schedule or architectural plans, together with your preferred colour and glass requirements where available, and we can prepare a quotation for your project.

Get a Quick Quote

Need aluminium window prices for a project in Johannesburg, Pretoria or elsewhere in Gauteng? Send us your window sizes, window schedule or architectural plans for a quick quote.