If you have bubble wrap lying around the house and you don’t care about the odd look, taping bubble wrap over a window is a very affordable way to insulate it. Another inexpensive option for insulating windows is to add new caulk around the glass. This step quickly cuts down on air drafts for older windows, and a tube of caulk only costs a few dollars. Adding plastic shrink film around the glass is another cost-effective option. You can purchase a kit of plastic film for a few dollars per window.

Applying window security film yourself is possible, but we don’t recommend it. This task is simple in theory, but getting the product to sit on your windows evenly and without bubbles underneath is challenging for DIYers who lack the necessary experience and tools. You might save money on labor by applying it yourself, but you might also end up with a film that doesn’t look appealing, prompting you to start over and spend the money on a professional installation anyway. Plus, most window film manufacturers will void your warranty if you install the product yourself.

The ideal thickness of window film depends on various factors and specific needs. Thicker films generally offer increased durability and enhanced security benefits. They are also typically more effective at reducing heat and blocking UV rays. However, thinner options may be preferable for some applications, such as decorative or privacy films. Thinner films are easier to apply and provide adequate privacy without compromising visibility. Ultimately, the best thickness of window film will depend on your specific requirements, desired benefits, and the recommendations of professional installers.

The costs range from $5 to $15 per square foot, depending on the film type, UV protection level, and labor.