Are Your Aluminium Windows Ready for Punjab’s High-Wind Storms?

A Sunday morning in Chandigarh, Mohali, Panchkula and Ludhiana changed quickly when dark clouds rolled in and strong winds swept across the region.

According to The Tribune, the India Meteorological Department issued a red alert for a moderate thunderstorm, with squall winds reaching around 60 kmph on May 3, 2026. Reports after the storm included damaged windows, cracked car windscreens, fallen temporary structures and power disruptions across several areas.

That does not mean every damaged window was poorly designed. A piece of debris travelling at speed can break even good glazing.

But weather like this does raise an important question.

Do you know what wind pressure your windows were actually designed to withstand?

For most homeowners, and even for many projects, that question is rarely discussed while selecting windows.

A Window Is More Than a Profile and a Piece of Glass

Window conversations often begin with familiar things.

What is the price per square foot?

How slim is the profile?

What is the glass thickness?

Is it toughened glass?

How smooth is the sliding system?

All of these matter, but they tell only part of the story.

When strong wind hits a window, the entire assembly has to respond together. The aluminium profile, reinforcement, glass, hardware, locking points, gaskets, frame connections and anchoring all play a role.

Even an excellent aluminium profile cannot compensate for loose hardware or poorly executed anchoring.

This is why at Lumani Systems, working with Schüco aluminium systems, we look at a window or door as a complete engineered system rather than a collection of individual components.

That distinction becomes much more important when openings get larger and buildings become taller.

What Strong Wind Actually Does to Your Windows

Wind does not simply push a window inward.

Depending on where the opening sits on a building, it can create positive pressure as well as suction. The pressure also changes according to the building's height, shape, surroundings and location.

A large window near the corner of an exposed building may experience very different forces from a smaller window on a sheltered ground floor.

This matters particularly in Punjab.

A villa on the outskirts of Ludhiana surrounded by open land does not have the same exposure as a house inside a dense Chandigarh sector. Similarly, a large sliding opening on an upper floor cannot automatically be treated the same way as a smaller ground-floor casement window.

The size of the opening matters too.

As glass panels and sashes become larger, structural behaviour becomes increasingly important. Frames can deflect, hardware carries greater loads and fixing points have more work to do.

This is why quoting a wind speed alone is not enough to judge whether a window is suitable.

IS 875 and the Wind Load Question

In India, IS 875 (Part 3) provides the framework engineers use to determine wind loads on buildings.

The process considers the basic wind speed for the region and then accounts for factors such as terrain, building height, topography and the characteristics of the structure.

The result helps engineers determine the wind pressure that different parts of a building envelope need to resist.

So when a specification simply says "as per IS 875", there is another question worth asking:

What was the calculated design pressure for this particular project?

Two buildings in the same city can require different solutions because their height, exposure and opening sizes are different.

A project-specific calculation is therefore far more useful than relying on a generic specification copied from one project to another.

Toughened or Laminated Glass?

Glass selection becomes another important part of the discussion.

Annealed glass can break into relatively large and sharp pieces.

Toughened glass undergoes heat treatment that increases its resistance to mechanical and thermal stress. When it breaks, it generally fragments into much smaller pieces.

Laminated glass works differently. Two or more layers are bonded using an interlayer. If the glass cracks, the fragments can remain attached to that interlayer rather than immediately falling away.

This can be valuable in locations where post-breakage behaviour and safety are important.

But there is no simple rule that one glass type is always "best".

The correct glass depends on panel dimensions, design load, location, safety requirements and the intended application.

Simply increasing glass thickness without considering the complete window system is not proper engineering.

The System Matters

Imagine specifying a high-performance aluminium profile and pairing it with hardware that is not suitable for the sash size.

Or selecting the correct glass but fixing the outer frame poorly to the structure.

On paper, the window may look premium. During severe weather, the weakest part of the assembly can become the problem.

This is one of the reasons Lumani Systems and Schüco take a system-led approach to premium windows, doors and facades.

Schüco systems bring documented engineering, system-compatible components and tested performance parameters. Lumani brings that system engineering into the project context through selection, detailing, fabrication, glazing, installation and on-site execution.

For a project in Punjab, the objective is not simply to specify a premium European system. The system still needs to be selected and engineered around the project's actual opening sizes, wind requirements, glazing, building conditions and architectural intent.

Good performance comes from the complete chain working together.

Punjab Doesn't Need One Standard Window Specification

Punjab's built environment varies considerably.

There are dense urban neighbourhoods, exposed plotted developments, farmhouses, large villas, high-rise apartments and increasingly ambitious residences with floor-to-ceiling glass.

Using exactly the same window specification across all these situations makes little sense.

Consider a large sliding door opening onto a terrace in an exposed villa near Mohali. Compare that with a compact casement window inside a protected residential neighbourhood.

Both may be aluminium windows, but what they are expected to handle can be very different.

The specification should reflect that.

What Should Architects and Developers Specify?

For larger residential, commercial and hospitality projects, the window specification should clearly establish the project's performance requirements.

That includes the calculated design wind pressure, opening dimensions, allowable frame deflection, appropriate glazing, hardware configuration, anchoring method, air and water performance requirements and relevant test documentation.

Installation also needs attention.

Fixing spacing, alignment, perimeter sealing, drainage and connections to the surrounding structure can directly affect how the finished system performs.

This is especially important with large-format aluminium windows and doors where small execution errors can become much more noticeable.

What Should a Homeowner Ask?

You do not need to be a facade engineer to ask useful questions.

Before finalising your windows, ask your supplier:

1. What wind pressure is this window system designed for?

2. Is that performance suitable for my opening size?

3. What is the recommended maximum sash size?

4. Why has this particular glass specification been selected?

5. Is the glass annealed, toughened or laminated??

6. What hardware is being used for this opening?

7. How will the frame be anchored to the building?

8. Is there documented test data for the system?

A professional window supplier should be comfortable discussing these points.

Where Lumani × Schüco Fits In

For premium homes and architectural projects, performance cannot be added after the window has already been designed.

It has to begin with the system itself.

Lumani × Schüco combines Schüco's engineered aluminium window, door and façade systems with project-specific planning and execution by Lumani Systems.

The focus is not only on creating slimmer profiles or larger glass openings. It is about making those architectural ideas work reliably in real conditions.

That means considering the profile, hardware, glazing, opening dimensions, weather performance, fixing and installation as parts of one system.

European system testing and India's IS 875 requirements serve different purposes. One should not be presented as an automatic substitute for the other. For projects in India, documented system performance needs to be considered alongside the project's actual wind-load calculations and local conditions.

That is how specification becomes meaningful.

RERA and Documentation

There is another practical reason to document window specifications properly.

Section 14(3) of the Real Estate (Regulation and Development) Act provides a five-year period relating to certain structural defects and specified defects after possession, subject to the circumstances and applicable provisions.

That does not mean every cracked pane or leaking window automatically becomes a RERA defect claim.

It does reinforce the value of maintaining proper project records.

Drawings, approved specifications, glazing details, test reports, installation records and handover documents can help establish what was specified and what was actually installed if a problem appears later.

8 Signs Your Windows May Not Have Been Properly Designed for Wind

1. There is no wind-load requirement mentioned in the specification.

2. Large sashes have been used without supporting structural calculations.

3. Large glass panels have no documented glass specification.

4. The frame visibly flexes during strong winds.

5. Hardware feels loose or does not lock cleanly.

6. Frame fixing points appear irregular or insufficient.

7. Air, dust or rainwater enters around the window during storms.

8. The supplier cannot provide relevant system or test documentation.

Any one of these does not automatically prove that a window is unsafe. It does mean the installation deserves a closer technical look.

The Question to Ask Before the Next Storm

The May storm was a reminder of how quickly weather conditions can change across Punjab.

Windows are expected to remain in a building for decades. During that time they will face thousands of cycles of heat, rain, pressure, suction and everyday operation.

So choosing aluminium windows only by profile appearance, glass thickness or price per square foot misses an important part of the decision.

Ask what the opening was engineered to handle.

Ask for the numbers.

Ask for the documentation.

And make sure the profile, glass, hardware, anchoring and installation have been designed to work together..

At Lumani Systems, our approach with Schüco systems is built around exactly that principle: engineer the complete opening for the project, not simply supply a window that fits the opening.

Quick Questions

What wind speed can an aluminium window withstand?

There is no universal wind-speed figure for aluminium windows. Performance depends on the system, opening dimensions, glass, hardware, design pressure, anchoring and installation.

Is toughened glass better than laminated glass during storms?

They perform different functions. Toughened glass has different strength and breakage characteristics, while laminated glass is designed to retain fragments after breakage. Selection should be based on the application and engineering requirement.

What should I consider when selecting aluminium windows in Punjab?

Start with the building location, exposure, height and opening sizes. The required wind pressure can then inform the selection of the aluminium system, glass, hardware and anchoring.

Can a premium aluminium system still perform poorly?

Yes. Even a well-engineered system can underperform if the wrong configuration is selected or fabrication, glazing, fixing or installation is poorly executed.

Planning a High-Performance Window or Façade Project?

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