How to Insulate Windows for Winter in Cold Climates

Have you noticed a consistent draft throughout your home when the temperatures drop? It may be that your older windows need to be replaced. Old or poorly installed windows are a common culprit for drafts that make your home feel cold during the wintertime. If you’re looking for some DIY fixes, or need to hold off on a window replacement, here are some solutions to help insulate your windows!

1. Use caulk to better seal windows

Using new caulk around the glass panes to improve a draft problem is a popular method in DIY window projects. If you feel cold air coming through your windows or notice existing seals have cracks, using new caulk can be especially helpful in creating a better seal.

Pro Tip: Choose a silicone caulk that matches your window colour (or trim). Remove old caulk and clean off any excess once you’re finished. Fill any gaps between your window panes and the window frame and let the caulk set for 24 hours.

2.  Install weatherstripping to windows

Installing weatherstripping to windows helps eliminate any gaps that may cause drafts.

Pro Tip: Measure the outermost seam of your window frames (the seam between the window and your wall). Then, cut four pieces of weatherstripping to size—one for each side of the window. Remove the adhesive backing from the weatherstripping, and press into the window seam to seal gaps. Simple, easy, and you’re done!

3. Apply clear insulation film to windows

Clear insulation film is an inexpensive and popular option that acts like a storm window, minus the installation process. To adhere the insulation film, wipe down and measure your window sill (the trim and frame). Then follow these instructions to put it on any windows needing additional insulation.

You will need:

• Tape dimensions for the size of your window -1 inch
• Film dimensions for the size of your window and frame +10 inches

How to apply the insulation film to your windows:

• Cut and measure the adhesive or magnetic tape that comes with the window insulation film kit. Apply adhesive tape to your whole window, leaving a 1-inch space from your window from the window frame edge.
• Cut your plastic film and add 10 inches to the height and width of your window, so when applied, the film goes beyond window glass—approximately 5-inches on each side.
• Press the plastic film firmly to your pre-taped window frame starting at the top and working down to the bottom of the window without leaving any gaps.
• Grab your hairdryer, select high heat, then blow-dry the plastic to smooth out wrinkles in the insulation film.

4. Use draft stoppers to cover windows

Draft stoppers (also called draft snakes) have been around for a long time, and are an effective way in eliminating window and door drafts. You can make your own draft stopper by creating a long, skinny fabric cylinder and filling it with rice or insulating material. Place the stopper at the bottom of your window or door to block the cold air from escaping in. Draft stoppers are easy to DIY and an affordable option.

5. Thermal curtains to help insulate windows

One additional way to block drafts in your home is using insulating thermal curtains. Thermal curtains are designed with two pieces of heavy fabric that have a layer of foam in-between to block out cold air from entering your home. Any curtain made from a heavier, thick weave fabric can work in the same way thermal curtains would at insulating your house and ensuring you have warmth and comfort throughout the cold months!

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We hope these DIY tips make insulating your windows effective and affordable for you! For more tips, visit How to Winterize Your Sliding Glass Doors to help insulate your patio doors!

Need help deciding on the best replacement windows or doors for your home? Our team can answer any questions you have and provide expert guidance every step of the way. Schedule a free consultation to discuss your project and get a quote!