Aluminium windows are widely used in residential buildings, offices, commercial complexes and high-rise structures across India. Their strength, durability, low maintenance and design flexibility make them a popular choice. However, window safety is not determined by the aluminium frame alone. The frame, glazing, hardware, installation method and resistance to environmental loads must meet appropriate technical requirements.
In India, several Indian Standards issued by the Bureau of Indian Standards (BIS) are relevant to aluminium windows. The key product standard is IS 1948:2024 — Aluminium Framed Doors, Windows and Sliders — Specification, while standards covering wind loads, installation and safety glass may also apply depending on the project.
IS 1948:2024: The Main Standard for Aluminium Windows
The most important standard specifically applicable to aluminium-framed windows is IS 1948:2024, titled Aluminium Framed Doors, Windows and Sliders — Specification. It is the current Indian Standard for these products and replaced the older framework represented by IS 1948:1961.
The standard addresses complete aluminium-framed doors, windows and sliders. The safety and performance of a finished window depend on how its components work together.
The latest applicable edition should be used when preparing project requirements.
Is BIS Certification Mandatory for Aluminium Windows?
An Indian Standard and mandatory BIS certification are not automatically the same thing. IS 1948:2024 is the applicable product specification, but BIS certification becomes compulsory when a product is covered by a government Quality Control Order or another applicable regulatory requirement.
Therefore, manufacturers should verify the current QCO notification and BIS certification requirements before claiming that every aluminium window sold in India must carry the ISI mark. Mentioning an Indian Standard on a quotation is not, by itself, proof of BIS certification.
IS 1081: Requirements for Installation and Glazing
A window can meet product specifications but still become unsafe if it is incorrectly installed. IS 1081 is the Indian code of practice for fixing and glazing metal, including steel and aluminium, doors, windows and ventilators.
Proper fixing, anchoring, glazing support and connection to the building structure help prevent problems such as frame movement, glass failure, water penetration and detachment.
For high-rise projects, installation requirements should accompany the window specification.
IS 875 Part 3: Wind Load Safety
Wind pressure is particularly important for aluminium windows installed on tall buildings. Windows on upper floors can experience greater wind pressure and suction than windows at lower levels.
IS 875 (Part 3):2015 — Design Loads (Other than Earthquake) for Buildings and Structures, Part 3: Wind Loads provides requirements for determining wind loads. Designers use the building location, height, exposure and other parameters to determine the loads that the window system must withstand.
For high-rise construction, it is not sufficient to select an aluminium profile simply because it appears strong. The complete window assembly should be designed and tested for the project’s required wind performance.
Safety Glass: IS 2553 Part 1
The glass installed in an aluminium window is as important as the frame. If a window is located where human impact or accidental breakage presents a hazard, appropriate safety glazing may be required.
IS 2553 (Part 1):2018 — Safety Glass — Specification, Part 1: Architectural, Building and General Uses covers safety glass used for architectural and building applications.
It covers types including toughened and laminated safety glass, which can reduce risks from dangerous breakage.
For doors, large glazed openings, high-traffic areas and certain elevated applications, specifying the correct safety glazing is particularly important.
IS 16231: Selection of Glass for Buildings
Another relevant standard is IS 16231 (Part 1):2019 — Use of Glass in Buildings — Code of Practice, Part 1: General Methodology for Selection.
It provides guidance on selecting glass for buildings. Location, performance and safety should be considered before appearance or price.
National Building Code of India
The National Building Code of India 2016 (NBC 2016) provides an important framework for building safety. It covers areas including fire safety, structural design and construction, building services and other construction requirements.
Aluminium windows may therefore need to meet their product standard as well as requirements applicable to the building where they are installed.
What Should Manufacturers and Buyers Check?
When purchasing aluminium windows in India, buyers should look beyond claims such as BIS quality or ISI approved. They should request documentation showing the standards and tests applicable to the supplied product.
Important documents may include:
- Compliance with IS 1948:2024, where applicable.
- Test reports for the complete window assembly.
- Wind-load or structural-performance test results where required.
- Documentation for the glass used.
- Evidence of compliance with IS 2553 (Part 1):2018 when safety glass is specified.
- Installation and glazing requirements based on IS 1081.
- Project-specific structural calculations based on applicable wind-load requirements under IS 875 (Part 3).
- Any required BIS licence or Standard Mark where compulsory certification applies.
Project specifications should identify the window type, dimensions, glazing, hardware, performance requirements and installation method.
Why Certification and Testing Matter
Certification and testing provide greater confidence that a window system has been manufactured and tested against defined technical requirements. They can help reduce the risk of premature failure, glass breakage, excessive air or water penetration, frame deformation and problems caused by inadequate installation.
Testing is particularly important for high-rise buildings because windows face stronger wind effects.
Certification should not be viewed as a substitute for proper engineering. A certified or tested window still needs to be correctly selected, sized, installed and maintained for the building application.
Conclusion
The principal Indian product standard for modern aluminium-framed windows is IS 1948:2024. However, window safety involves more than the aluminium frame itself. IS 1081 is relevant to fixing and glazing, IS 875 (Part 3) addresses wind-load design, and IS 2553 (Part 1) is important when safety glass is used. The National Building Code also provides broader building safety requirements.
For manufacturers, architects, contractors and property owners, the safest approach is to specify the latest applicable Indian Standards, obtain appropriate test and compliance documentation, and verify whether BIS certification is legally mandatory for the particular product and project. This helps ensure long-term window safety and performance.
