The most popular tint percentage for home windows is 35%. Generally, most homeowners choose a visible light transmission (VLT) between 50% and 35%, where lower numbers mean less sunlight enters the home. A 35% tint blocks over half the incoming light while still allowing plenty of natural light, which can improve energy efficiency and comfort. If privacy is a primary concern, you can opt for a tint of 50% or lower to make it more difficult for people to see inside. However, keep in mind that very dark, thick tints may offer fewer energy-efficiency benefits.

Unlike cars, there are no laws regulating window tint percentages on homes, so you can choose what you think is best. It is often a good idea to hire a professional, as they can show you samples of how different tint levels will look in your specific property, helping you make the right choice.

If your window film doesn’t come with an installation kit and its own application solution, you can make your own—but don’t use soap! Instead, use 1 teaspoon of baby shampoo mixed with a gallon of bottled water. Make sure the bucket in which you mix this solution is completely clean.

Energy-efficient windows are judged on their performance according to a few different factors, including heat transfer, air leakage, light transference, and condensation resistance. If you're unsure whether a window is energy-efficient, look for an ENERGY STAR® label from the U.S. Environmental Protection Agency (EPA). If various products, including windows, meet energy-efficiency standards set by the federal government, the EPA issues this label to help consumers identify energy-efficient products.

The visibility through tinted house windows depends on the lighting. During the day, when it is brighter outside, privacy film prevents people from seeing into your home. However, this effect reverses at night. If you have lights on inside, it becomes brighter indoors than outdoors, allowing people to see inside. To optimize privacy, you can select from various shades of film, ranging from lighter to darker, which affects how much is visible from the outside.