A common way to modernize arched windows is to install interior window treatments that allow light through the curved portion up to and let you cover the bottom portion for privacy. You can also install plantation shutters to make an arched window look more modern. From the exterior, arched windows can appear outdated if they’re coupled with ornate trim, so toning down the decor can make your window look more natural with a modern design.

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.

To darken your windows without curtains, try installing window film or even installing an awning outside your windows. Window film is a DIY-friendly option with many different darkness levels you can choose from to fit your desired look. Awnings can also help by casting shade over your window, though this isn’t feasible for every home. 

Yes, most professional-grade window films include warranties covering fading, peeling, and bubbling.