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Window security film won’t prevent break-ins or stop your window from shattering from impact during extreme weather like hurricanes or tornadoes. However, applying security film is relatively inexpensive, and it can make breaking into your home significantly harder—often hard enough to deter burglars entirely—and keep your window from shattering on your floor after impact. For these reasons, window security film is often a worthwhile investment that helps protect your property.

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.

Upgrade to double-glazed glass or apply energy-efficient coatings to reduce heat loss and utility costs.

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.