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HomeTinting TimesEnhancing Energy Efficiency with 3M Prestige 40 Window Film for Double-Glazed Windows & E Glass

Tinting Times

Enhancing Energy Efficiency with 3M Prestige 40 Window Film for Double-Glazed Windows & E Glass

At Total Tint Solutions, we have been relayed information by our customers by their Glass Company / Glaziers that customers will lose some / all the thermal benefits by putting a window film on the glass (externally). Especially on Viridian Smart Glass.

This is a massive claim and one you can add to the BS bucket.

tinting double glazed windows

Tinting double glazed windows and e-glass is possible.

Firstly, if window film is installed on the exterior then the film doesn’t touch the low E coating and it’s not affected.

Secondly, It’s worth noting that for double or insulated glazing, this isn’t a concern, as the Low-E coating is typically applied to either Surface 2 or 3, meaning the interior side.

So why are customers not happy with their required Low E smart glass?

The backstory reveals that the National Construction Code (NCC) mandated the use of Low-E glass in all new constructions. But overlooked the Solar Heat Gain Coefficient (SHGC), resulting in excessively hot houses during summer months. Consequently, homeowners are now seeking solutions to mitigate this summer heat issue, even if it means sacrificing the winter U-value benefits.

But with 3M Prestige Exterior, you get have the best of both worlds.

Challenges with Low-E glass and window films.

Low-E glass is available with both ‘Hard’ and ‘Soft’ Pyrolytic coatings, but distinguishing between the two can be confusing. When it comes to installing internal solar films on Low-E glass, there are significant challenges to consider


  1. Yes, internal film will negate the Low E glass properties. For Example, they lose the Heat Loss Reduction benefits in Winter! But they do get a lot better Solar Heat gain reduction for Summer!  
  2. When cleaning the internal Low E coating for the film installation, you can easily ‘scratch’ the ‘Soft’ Low E coating. This may not be even noticed until the film is installed and then the shadow it casts on the floor can highlight these scratches.
  3. A Second issue with the ‘Hard’ Low E Coatings is that the very act of cleaning with a Scrapper blade can actually leave metal fragments on the glass. These basically rust under the film! (it is recommended to use a low-level HCL wipe to remove this!)
  4. Finally, If the window film needs removal from the soft coating this can also be an issue with getting the PSA off the glass. Again leading to scratching of the glass.

This is why it’s not recommended to add the film directly to the Low E coatings. But this isn’t the only option. Using an exterior window film allows the window film to not be in contact with the low e film.

tinting double glazed windows

3M Exterior window tinting will not reduce the glass performance!

When installing the 3M Prestige Exterior film, we’re leaving the Low-E coating untouched, avoiding any potential issues while maintaining the glass’s U-value. By applying an external film, we enhance the Total Solar Energy Rejected (TSER). This aligns with the typical preferences of homeowners seeking to mitigate heat and glare. This solution effectively boosts performance. While it’s true that in extremely cold climates, there may be a reduction in passive heat gain during winter, this concern doesn’t apply to Perth or similar regions.

This innovative film not only enhances the aesthetic appeal of your windows but also offers a multitude of benefits that contribute to a more sustainable and comfortable living environment. Including,

1. Solar Heat Rejection:

The 3M Prestige 40 Window Film is designed to reject up to 97% of infrared heat. It provides an effective barrier against the sun’s intense rays. This feature is particularly valuable in warmer climates, as it helps regulate indoor temperatures and reduces the load on your cooling systems.

2. UV Protection:

Harmful UV rays can not only damage your skin but also your interior furnishings. The window film provides 99.9% UV protection, safeguarding your home and its occupants from the sun’s harmful effects. It preventing fading and deterioration of furniture, flooring, and other belongings.

3. Glare Reduction:

Enjoy a clearer and more comfortable view of the outside world with the 3M Prestige 40 Window Film, which significantly reduces glare. Whether you’re working on a computer, watching television, or simply relaxing, this film ensures that your eyes are protected from harsh sunlight and reflections.

4. Preservation of Views:

Unlike traditional reflective films, the Prestige 40 Window Film is virtually clear and allows for uncompromised views. You can relish the beauty of the outdoors without sacrificing privacy or aesthetics.

5. Energy Savings:

By minimising the need for excessive air conditioning during warmer months, the window film contributes to lower energy consumption and reduced utility bills. This not only benefits your pocket but also lessens your overall environmental impact.

6. Easy Maintenance:

The 3M Prestige 40 Window Film is durable and easy to maintain. Its scratch-resistant coating ensures longevity, and routine cleaning is a breeze, contributing to long-term cost savings and hassle-free upkeep.

In conclusion, tinting double glazed windows is possible, and while double-glazed windows excel at retaining indoor heat, the addition of 3M Prestige 40 Window Film elevates their performance. From solar heat rejection and UV protection to glare reduction and energy savings, this innovative solution offers a comprehensive approach to creating a more comfortable, efficient, and sustainable living space. Consider upgrading your double-glazed E windows with this advanced film for a home that not only looks impressive but also performs exceptionally in all seasons.

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            What Our Clients Say

            4WD window tinting

            “Excellent service and communication. If you are a RAC member you might get a great discount as I did. The tint applied to my 4WD is perfect with no flaws of issues. Ian and his team are friendly down to earth people who will make you feel welcome.

            I have another vehicle that needs window tint and I will have that done with Total Tint Solutions in Mandurah in due course with full confidence.  Not often you come across a business like this that puts you first and does a highly professional job. Thanks Ian and team!”

            white mustang with car tint and paint protection

            “I got my brand new Mustang tinted by Total Tint Solutions. It been a dream car for me and with the dark tint, it really made it pop. I also got them to apply their latest paint protection. My car stays cleaner for longer and the water just beads off it. Highly recommend these guys for great service, advice and value”

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