12 Questions to Ask Before Buying Aluminium Windows (And How to Read a Quote)

October 30, 2026

Buying aluminium windows involves more than picking a design. The frame, glass, hardware, and installation all affect how well your windows perform and how long they last.

Prices can also vary between suppliers, even when the windows look similar. Differences in materials, fittings, and installation services can change the final cost.

Before placing an order, ask these 12 questions to understand the specifications and compare quotations.

12 Questions to Ask Before Buying Aluminium Windows

1. Which Grade of Aluminium Do You Use?

Ask the supplier about the aluminium grade, profile design, and frame thickness. These details affect the frame’s strength and suitability for different window sizes. 

For example, 6063 T6 aluminium alloy is commonly used for architectural windows. Check the specifications instead of relying on general claims about quality.

2. Which Window Style Suits My Home?

Sliding, casement, fixed, and tilt-and-turn windows serve different purposes. Sliding windows save space, while casement windows open to provide ventilation. Fixed windows bring in natural light but do not open. 

Consider the room layout, ventilation needs and available space before selecting a style.

3. What Type of Glass Is Included?

Ask whether the quote includes standard, toughened, laminated, tinted or specialised glass. Toughened glass offers better resistance to impact, while laminated glass helps hold broken pieces together. Solar control and low-emissivity glass can help reduce heat entering your home. Confirm the glass thickness and safety requirements for each window.

4. Will the Window Reduce Heat and the Outside Noise?

The glass, frame design, and seals affect how much heat and noise enter your home. Ask whether the aluminium window systems support double glazing or thermal breaks, where needed. These features can improve insulation, depending on the complete window design.

Consider your local climate, the direction your windows face and nearby traffic when discussing the specifications with your supplier.

5. Which Handles, Locks and Fittings Are Included?

Handles, hinges, rollers and locks affect how easily you can operate your windows and secure your home. Ask which hardware the supplier will provide and whether the price includes all fittings. 

For sliding windows, check the roller quality and locking mechanism. Confirm these details before approving any changes.

6. Which Colours and Finishes Can I Choose?

Aluminium windows are available in powder-coated and anodised finishes, with different colours and textures. Ask the supplier to show the available options and explain the finish specifications. Homes near the coast may need finishes suited to salt-laden air. 

If you want different colours on the inside and outside, check whether dual-colour options are available.

7. Can the Windows Handle Heavy Rain and Strong Winds?

Your windows should suit the weather conditions in your area. Ask about their water resistance, air leakage and wind resistance ratings, where available. Drainage channels, rubber seals and proper fitting also help prevent water from entering the home. 

Pay close attention to these details if your area receives heavy monsoon rain or strong winds.

8. What Does Aluminium Window Installation Include?

Ask whether the quote covers site measurements, transport, fixing, sealing and finishing around the frames. Confirm who will carry out the aluminium window installation and who will handle problems caused by poor fitting or sealing.

Even good-quality windows can develop leaks or become difficult to operate if the installer does not fit them properly. Get the full installation scope in writing before placing your order.

9. What Does the Warranty Cover?

Check the warranty period for the frames, glass, finish and hardware. Installation may have separate coverage. Ask about exclusions, repairs, replacement parts and the process for making a claim. Read the terms and keep a written copy for future reference.

10. How Much Maintenance Will Windows Need?

Aluminium windows need regular cleaning and occasional checks. Ask the supplier how to clean the frames, glass and tracks, and how to maintain the seals and moving parts. Also, check which cleaning products you should avoid to prevent damage to the finish or hardware.

11. When Will the Windows Be Delivered and Installed?

Ask for a timeline covering final measurements, manufacturing, delivery and installation. Custom sizes, glass types and finishes can affect the production schedule. 

Get an estimated completion date and ask how the supplier will inform you about delays, especially if the windows are part of a larger construction or renovation project.

12. Can You Provide a Detailed Quotation?

Ask for an itemised quote that lists window sizes, quantities, opening styles, aluminium profiles, glass, finishes and hardware. The quote should also state whether transport, installation, GST and other charges are included.

A detailed breakdown helps you understand what you are paying for and compare offers from different suppliers.

How to Read An Aluminium Window Quote

Do not compare suppliers on price alone. Check whether each quote includes the same materials, fittings and services.

Review these details before making a decision:

• Window sizes and quantities: Check the dimensions, number of windows and opening styles.
• Aluminium profiles: Compare the profile specifications and finish.
• Glass: Check the type, thickness and any special features.
• Hardware: Confirm which handles, hinges, rollers and locks the price includes.
• Installation: Check transport, fixing, sealing and finishing charges.
• Taxes and extra costs: Review GST, optional upgrades and any work excluded from the quote.
• Warranty and payment terms: Check the coverage, payment schedule and delivery date.

If one quote costs much less than the others, ask the supplier to explain why. The difference could come from the glass, frame specifications, hardware, finish or installation services.

Compare quotes with similar specifications before making your decision. This will help you understand the actual cost and avoid unexpected charges later.

Final Thoughts

Before buying aluminium windows, check the materials, glass, hardware, installation costs, and warranty. A detailed quote will help you compare suppliers and understand what each one offers.

Alteza, India’s leading aluminium window and door manufacturer, offers solutions for residential and architectural projects, including premium aluminium windows. Contact our team and request a detailed quotation before placing your order.

FAQs

A. Aluminium windows can last for many years with proper installation and regular cleaning. Their lifespan depends on the quality of the frame, finish and fittings.

Q3. What should I check before aluminium window installation?

A. Check the measurements, glass type, frame quality, locks, installation charges and warranty. Also, confirm the delivery date and what the quote includes.