Glare Reduction vs Solar Control Window Film – What’s the Difference?

Close up photo showing glare reduction window film on the front of a commercial building

Glare reduction and solar control window film are often discussed as if they are the same thing. In reality, they address different, though related, issues within commercial buildings.

Understanding the difference is important when specifying film for offices, public buildings or workspaces where comfort and performance matter.

This article explains what each solution does, when it is appropriate, and how they work together.

What Is Glare?

Glare occurs when excessive brightness makes it difficult to see clearly. In office environments, this usually affects:

• Computer screens

• Reception desks facing glazing

• Open-plan desks near large façades

• Meeting rooms with projection equipment

Glare does not always mean excessive heat. It is primarily a visual comfort issue, though it can coincide with solar gain.

Prolonged glare can contribute to:

• Eye strain

• Headaches

• Reduced productivity

• Staff repositioning desks or using temporary blinds

If glare is a concern, our commercial glare reduction window film solutions explain how we assess brightness and how we control this in office and commercial environments.

Tinted window next to untinted window showing effect against sun glare

Outside shot showing front of a building that is half tinted with a glare reduction window film

What Is Solar Control?

Solar control refers to the management of solar energy entering a building through glazing.

Solar radiation includes:

• Infrared energy (heat)

• Visible light

• Ultraviolet radiation

Solar control films are designed to reduce:

• Solar heat gain

• Internal temperature rise

• Load on air conditioning systems

• Thermal discomfort in occupied areas

Unlike glare reduction alone, solar control is a thermal performance solution.

Where overheating is an issue, our commercial solar control window film systems focus on managing solar heat gain effectively.

Outside of a building with heat reduction window film

Inside a building showing heat reduction window film after installation

The Key Difference

In simple terms:

• Glare reduction manages brightness.

• Solar control manages heat.

Some films can achieve both. However, not all glare-reducing films significantly reduce heat, and not all heat-reducing films provide optimal glare control.

Specification depends on:

• Building orientation

• Glazing type

• Usage of the space

• Occupant sensitivity

• Aesthetic considerations

When Is Glare the Primary Issue?

Glare-focused specification is typically appropriate when:

• Staff sit directly facing glazing

• Screens are affected at certain times of day

• Temperature remains manageable

• The client wants minimal change to external appearance

In these cases, a film with moderate light reduction may be sufficient.

When Is Solar Heat the Primary Issue?

Solar control is usually prioritised when:

• Internal temperatures rise significantly during sunny periods

• Large glazed façades face south or west

• Open-plan offices experience uneven temperature zones

• Cooling systems are under strain

In these scenarios, films with higher solar energy rejection are specified.

Do Most Projects Require Both?

In commercial environments, the answer is often yes.

A properly specified solar control film will:

• Reduce glare

• Reduce solar heat gain

• Maintain usable natural light

• Improve overall occupant comfort

The key is selecting the correct performance balance.

Internal vs External Installation

In some buildings, internal film application is appropriate.

In others, particularly where access is restricted or glass type demands it, external installation may be required.

Access planning, glazing assessment and thermal stress considerations should always form part of the specification process.

Choosing the Right Film

There is no “best” film universally.

Selection should consider:

• Solar energy rejection (g-value / TSER)

• Visible light transmission

• External reflectivity

• Glass type compatibility

• Installation access

This is why site surveys remain important for commercial projects.

Summary

Glare reduction and solar control are related but distinct.

Glare is a visual comfort issue. Solar control is a thermal performance issue.

In most commercial environments, the most effective solution addresses both in balance.

If you are experiencing discomfort from glazing, the first step is understanding whether brightness, heat – or both – are the root cause.

A practical example of this can be seen in our Ravenscraig solar control case study, where glare and heat reduction were both required on an external installation.

Need Advice on Your Building?

If you're unsure which solution is appropriate, we’re happy to review photos, conduct site surveys and provide guidance based on your glazing type and building usage.

You can contact our team for a site survey to find out more.