Smart Glazing Systems: Are They Worth The Investment?

For quantity surveyors looking to enhance building performance and reduce operational costs, smart glazing systems offer an innovative solution that may be worth exploring. By incorporating advanced technology into building windows, these systems offer the potential for dynamic control over light, heat, and privacy, but are they worth the investment? This article takes you on a tour of the features, benefits, and applications of smart glazing systems, with a focus on their role in improving energy efficiency and long-term cost savings.

What Are Smart Glazing Systems, And Why Are They Important?

Unlike traditional glass, which has static properties, smart glazing is a dynamic solution that adapts to environmental conditions, optimising comfort and energy usage. Smart glass can change its light transmission properties when voltage, light, or heat is applied, meaning it actively responds to both user controls and external conditions.

From office spaces that require enhanced daylight to residential properties seeking energy efficiency, smart glazing systems are an innovation designed to align perfectly with today’s emphasis on sustainable and functional design. This is particularly relevant in the UK, where regulations such as Building Regulations Part L and the Building Safety Act 2022 are driving higher standards in building performance.

Why Does Energy Efficiency Matter?

Energy efficiency is crucial in modern construction and is increasingly regulated. Smart glazing systems contribute significantly to sustainability goals by reducing dependency on artificial lighting and air conditioning. This lowers both costs and emissions, supporting compliance with tightening carbon and energy performance targets. For quantity surveyors tasked with balancing budgets while adhering to energy standards, integrating smart glazing is a forward-thinking solution that can help achieve both regulatory compliance and lifecycle savings.

Smart Glass Technologies: Electrochromic & Thermochromic

Electrochromic Smart Glass

Electrochromic smart glass uses electrical currents to control its opacity or tint. The technology involves sandwiching electrochromic materials between layers of glass, causing the tonality to change gradually when voltage is applied.

Features And Advantages:

• Dynamic control over light and glare, which improves comfort.
• Minimising solar heat to help reduce HVAC costs.
• Customisable levels of transparency, giving you privacy on demand.
• Integration with automated systems, enabling remote or timed adjustments.

Limitations:

• You need a steady power source to use electrochromic glass.
• The transition between opacity levels is gradual rather than instant, and the speed can vary depending on pane size.

Electrochromic smart glass is ideal for applications requiring frequent adjustments, such as offices, meeting rooms, or healthcare facilities, where privacy and light management are priorities.

Thermochromic Smart Glass

Thermochromic smart glass adjusts its tint based on temperature rather than electrical input. When heated by sunlight, the glass darkens to block solar heat and protect interiors.

Features And Advantages:

• It doesn’t need an electrical source.
• Automatic response to sunlight, reducing cooling loads.
• It’s a highly effective solution that can replace or reduce reliance on traditional shading like blinds.

Limitations:

• Tinting is automatic in response to temperatures, so user control is limited, especially when compared with other systems (for example, electrically controlled).
• Performance can be less predictable in climates with sustained high sunlight, as the glass will continue to darken without user control.

Thermochromic smart glass is particularly suited to residential and static-use environments where automation is less critical, but passive energy control is desirable.

The Verdict

Smart glazing systems do require a higher initial investment compared to traditional glass. However, they offer significant life-cycle savings by reducing energy bills. The ability to dynamically regulate heat gain and control sunlight can lower heating, cooling, and lighting costs by up to 30%, depending on design, orientation, and specification. Actual performance will vary by project, so energy modelling at the design stage is essential.

Furthermore, integrating smart glazing enhances a building’s marketability by aligning with sustainability goals and energy efficiency regulations, a significant factor in premium residential and commercial building valuations. As with any façade system, however, procurement decisions should also consider lead times, access requirements for large glazing units, integration with façade systems, and installation training needs to ensure successful delivery under CDM Regulations.

​Future Trends

Smart glazing technology continues to advance, with the next generation of systems expected to deliver even greater performance and value. Ongoing innovation is focused on:

• Better integration with building systems: Smart glass is increasingly being linked to building management systems (BMS), allowing glass to respond automatically to sensors or programmed schedules. For example, windows may adjust in response to external light levels, internal temperatures, or occupancy, reducing the need for manual intervention and ensuring consistent energy performance.
• Improved energy performance: Manufacturers are working on enhanced coatings and interlayers that improve thermal insulation and solar control. This supports energy-efficient design targets and can help demonstrate compliance with project specifications and sustainability benchmarks.
• Sustainability and carbon reduction: As the UK construction sector moves towards net-zero goals, demand for smart glazing will rise as part of a fabric-first approach. By reducing reliance on HVAC systems and artificial lighting, smart glazing can cut both operational costs and emissions over the building’s lifecycle.
• Lower costs and faster transitions: Research is focused on reducing manufacturing costs, increasing durability, and improving response times between clear and tinted states. This will make smart glazing more viable for larger projects and ensure more predictable performance in day-to-day use.

These developments signal that smart glazing is moving beyond a “specialist feature” to become a practical, future-ready solution that supports compliance, cost control, and sustainability benchmarks in both residential and commercial construction.

Making Smart Decisions In Glazing

At Advanced Glass, we specialise in innovative façade solutions, including smart glazing systems. To learn how our products can enhance your next project, contact us today and take the first step toward energy-optimised design.

​Image source: Canva