How Window Films Help Buildings Meet Sustainability Goals

Buildings account for over 20% of Singapore’s carbon emissions, and the pressure on property owners to address that figure is growing. The Singapore Green Building Masterplan (SGBMP) sets targets of 80% of buildings green by 2030, 80% of new developments meeting Super Low Energy standard from 2030, and 80% energy efficiency improvement from 2005 levels for best-in-class buildings by the same year. For building owners looking for practical, cost-effective ways to move toward these targets, solar control window film is one of the most accessible retrofits available, and one of the most underutilised. 

Where Does Most of a Building’s Heat Come From?

In a heavily glazed commercial building, windows are where the thermal problem begins. An estimated 33% of cooling expenses in commercial buildings are due to solar heat gain through windows. Solar control films address this directly by blocking a significant portion of infrared radiation before it enters the building, reducing the demand placed on HVAC systems throughout the day. The practical result: 

• Less solar heat entering the building means cooling systems run less intensively
• Up to 30% cooling energy savings, with payback periods that can fall within two to five years for mid- to high-rise commercial buildings, subject to glazing area, film type and how intensively the building is cooled
• For a building running air-conditioning across multiple floors and long operating hours, that reduction compounds into meaningful cost and emissions savings over time

Read: Can Car Window Films Help Save on Fuel and Electricity?

Does Window Film Actually Help With Green Mark Certification?

Solar control window film can support a building’s Green Mark performance, particularly where it reduces solar heat gain through glazing and lowers cooling demand. However, installing window film does not automatically earn Green Mark certification or specific Green Mark credits. Its contribution depends on the building, the film selected and how the resulting performance improvement is assessed and documented.

For example:

BCA’s Green Mark 2021 framework places significant emphasis on energy performance while also considering outcomes such as health and wellbeing and whole-life carbon. Green Mark 2021 officially took effect on 1 November 2021; its 2nd Edition took effect on 1 January 2024, and BCA has assessed all GM: 2021 projects using the 2nd Edition documents since 1 June 2024.For property owners, this means window film is best viewed as one possible energy-efficiency measure within a broader Green Mark strategy, rather than a standalone route to certification. Whether a particular installation contributes to a Green Mark assessment should be confirmed against the applicable Green Mark criteria, project calculations and supporting product data.

Is Replacing the Glass Necessary?

Not always, and often not at all. Sustainability is not only about energy consumption. The carbon footprint of construction activity, including the manufacture, transport and installation of replacement glass, is considerable. Solar control window films can reject a significant portion of solar heat, and advanced products provide a non-invasive upgrade to a building’s thermal envelope without requiring glass replacement. For older commercial buildings with large glazed facades, film retrofitting is a significantly lower-impact intervention, both financially and environmentally.

A straightforward comparison:

What About the People Inside the Building?

Sustainability goals in commercial buildings are increasingly evaluated not just through energy metrics but through occupant wellbeing criteria. Highly conductive glass curtain walls allow significant solar radiation to flood interior spaces during peak operating hours, forcing mechanical cooling equipment to work constantly to offset the thermal load. The day-to-day consequences for occupants include: 

• Uneven temperatures between perimeter and interior workstations
• Glare on screens during certain hours of the day
• Discomfort that affects concentration and productivity over time

Solar control film moderates these conditions by reducing heat and glare before they reach the interior, supporting a more stable environment for the people working in it.

Protecting Interiors and Reducing Replacement Cycles

UV radiation accelerates the deterioration of furnishings, flooring, upholstery and display materials, shortening replacement cycles and generating waste that carries its own environmental cost. High-quality window films block up to 99% of UV radiation, slowing the rate at which interior assets degrade. For commercial interiors where fit-outs represent substantial investment, this is a resource efficiency argument as much as a comfort one.

A Practical Step Towards a More Sustainable Building

Window film will not on its own bring a building to net-zero, but it addresses one of the most significant and most accessible variables in a building’s energy profile. For property managers and building owners navigating Green Mark requirements, rising energy costs and broader sustainability commitments, it is a retrofit that delivers practical benefits with minimal disruption.

At V-Tint, we work with commercial clients on solar control and building film applications suited to Singapore’s climate. If you are exploring ways to improve comfort, manage solar heat gain or upgrade existing glazing, make an appointment with our team to discuss whether window film may be suitable for your property.

Find us here.