Tint Questions: How Does Window Tint Reduce Heat?

July 6, 2011

People usually have a lot of questions about window tinting and with over 30 years in the tinting business, we’re happy to answer them. A few questions are more popular than others, so we’ve decided to answer some of your most popular window tinting questions here on the Tint World® blog.

One question we’ve heard a few times around our stores is “does window tinting reduce heat?” or “how much heat can tinting block?”. That’s a great question, and one that reveals one of the more comfortable advantages of window tinting.

Tint Question: Does Window Tint Reduce Heat?


The short answer is yes, window tint does reduce thermal rays and, therefore, heat. In fact, that’s one of the top reasons for tinting windows in your vehicle, home, or office. Now that you know the short answer, we’ll go into more detail and answer some more specific questions about window tinting and thermal rejection properties.

How Does It Work?

Basically, window tint is designed to reject the thermal rays that make sunlight increase temperature. Tint World®‘s solar window tint is spectrally-selective, meaning that it only lets certain wavelengths of radiation pass through. By blocking the wavelengths that create heat, and passing the ones that create natural light, solar window tint acts as a filter that prevents interior heating without blocking the illuminating features of the sun’s rays.

How Much Heat Can Window Tint Block?

Heat rejection properties vary by tint type, shade, and quality. Different tint providers also offer differing types of solar tint, so be sure to inquire about heat rejection percentages wherever you purchase window tint or film. Tint World®‘s lowest solar rejection film blocks about 40% of heat, while Tint World® Ultimate Tint blocks up to 71% of thermal energy. If you aren’t sure what level of heat rejection you need, Tint World® representatives will work with you to determine your goals, and then help you decide the type of tint you need.

Does Window Tinting Reduce Heat in the Car and Keep It Cooler?

Window tinting definitely keeps vehicle interiors cooler. The problem with car windows (the windshield in particular) is that they are designed to give you a wide view outside, but this also lets massive amounts of solar energy inside, heating your car to uncomfortable temperatures. Vehicle window tinting can filter sunlight and keep your interior cooler, and this can even be accomplished with windshields since solar tint doesn’t have to be dark in shade.

Can I Keep Homes and Buildings Cooler with Window Tint?

As with vehicle windows, solar tint blocks thermal rays just as well on homes, offices, and other buildings. We love buildings with large window views of the outdoors, but large amounts of sunlight can quickly heat up a room and significantly increase cooling costs. With residential and commercial solar window film, you can have your cake and eat it to with large windows that let in plenty of clear, natural light, but block the rays that leave you sweating in your chair. Solar tint even has insulative properties so it will prevent heat loss in colder months.

Hopefully we’ve answered most of your questions about solar window tint and heat rejection. If you still have questions about how window tint reduces heat, or how solar window film is used, don’t hesitate to contact a Tint World® representative who will be happy to provide more details and answer any other window tint questions.