Renters who want to keep energy costs low need to properly insulate their windows. Drafty windows can make your space less comfortable, contribute to heat loss, and drive up your energy costs. Read our guide below to learn how to achieve proper insulation carefully without forfeiting your security deposit.

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Importance of Proper Window Insulation

Proper insulation keeps cold air from infiltrating your apartment and heated air from leaking out. Improved window insulation is one of the best and most affordable ways to reduce your heating costs. You can lose about 30% of your home’s heating and cooling energy through windows, according to the United States Department of Energy.

Poor insulation can also lead to issues with indoor air quality and humidity. Rain and melting snow may seep through the windows, which can cause water, pests, dusts, and odors to enter. Excess condensation that builds up can lead to mold or mildew on your window frames and sills.

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Assessing Your Apartment Windows

Inspect your windows carefully and identify any problem areas before you start adding insulation.

Identifying Drafts and Leaks

Check for drafts and leaks around your windows. Visually inspect the windows for gaps, cracks, or worn weather stripping. Hold a lit candle or incense stick near the edges of your window frames on a windy day. If the flame flickers, or if the smoke blows back, you probably have a draft.

Measuring Window Dimensions

Take an accurate measurement of your windows so that you purchase materials that are the correct size. Measure the width and height of each window, including the frame. Add a few inches to your measurements to make sure you get complete coverage.

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Apartment Window Insulation Options

Below are a few budget-friendly and renter-approved methods that can help you to improve your window insulation. You can find most of these products online or at your local hardware or home improvement stores.

Bubble Wrap

Affix bubble wrap to your windows to add an extra cushion of air between the winter chill and your heated apartment. This system will function the way double-glazed or double-pane windows do, and will allow sunlight through. Bubble wrap won’t seal cracks and gaps as well as film, caulk, and weather stripping, though.

Make sure the bubble side faces the window pane to maximize insulation.

Rope Caulking

Use rope caulking to reinforce old caulk. Simply press the rope caulk into the crevices around your windowsills and frames with your fingertips. The rope caulk will seal off any gaps through which cold air might enter. It’s also flexible and easy to remove.

You can find rope caulk at any home improvement or hardware store.

Thermal Insulating Curtains and Shades

Consider investing in new window treatments, such as thermal insulating curtains, for an aesthetically appealing solution. These curtains contain multiple layers of fabric that block out light and provide a barrier against heat loss. Make sure the curtains extend beyond the window frame and can close tightly.

You can also invest in pleated insulated cellular shades, which can reduce heat loss by 40%, according to the Department of Energy. These also allow you to control the light that enters your space. They feature a honeycomb structure that traps air, which helps to insulate.

Updated Weather Stripping

The weather stripping around your window frame can degrade and become less effective over time. Updating your weather stripping only requires a pair of scissors and the necessary materials. Simply remove the old weather stripping, clean the area, and apply the new materials.

Renters can choose from several types of weather stripping, such as adhesive foam tape, felt, rubber, draft snakes, or silicone. The type you need depends on the location of the leak. Some close gaps between sills, while others fit in crevices or cracks.

Window Inserts

Window inserts are clear panels that fit inside your interior window frame and create an extra barrier against cold air. They’re usually made of plastic or acrylics, and you can hold them in place with magnetic tape. They can also help to muffle outdoor noise.

Window inserts are more expensive than other options, but you can remove them during the warmer months, store them, and reuse them

Window Insulation Film

Window insulation film frequently comes with window insulation kits that includes double-sided tape and enough plastic to cover multiple windows. This type of insulation works like shrink-wrap, and creates an airtight seal over the entire window.

Follow the steps below to use this type of film:

1. Clean the window and frame thoroughly.
2. Apply double-sided tape around the window frame.
3. Cut the plastic film to size. Leave a few extra inches on each side.
4. Carefully press the film into the tape. Smooth out the wrinkles.
5. Use a hair dryer to shrink the film and create a tight seal.
6. Trim away excess film.

Use a blow-dryer to loosen the adhesive, then carefully peel off the plastic. Diluted acetone, soapy water, or Goo Gone can help you to remove any remaining tape residue.

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Other Ways to Reduce Chill and Heating Costs

Stay comfortable and maintain your home’s energy efficiency by employing the strategies below.

Using Space Heaters Effectively

Use space heaters to heat specific areas of your living area without increasing the temperature throughout your entire home. Consider the tips below when using a space heater:

• Choose an energy-efficient model that has safety features.
• Keep it away from flammable materials and out of high-traffic areas.
• Turn it off when you’re leaving the room or going to sleep.
• Use it in occupied rooms only.

Optimizing Thermostat Settings

Properly managing your thermostat can improve your home’s energy efficiency. Consider the tips below.

• Avoid drastic temperature changes, which can tire out your heating system.
• Keep the temperature as low as possible during waking hours.
• Lower the temperature when you’re asleep or away from home.
• Use a programmable thermostat to automate temperature changes.

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FAQ About Insulating Apartment Windows for Winter

What is the best way to insulate your windows in winter?

The best way to insulate your windows in winter is window insulation film. Caulk and weather stripping are cheap, easy, and effective alternatives. Thermal curtains or cellular shades cost more but provide more aesthetic appeal.

Is it a good idea to buy a space heater for your apartment?

Yes, it’s a good idea to buy a space heater for your apartment. Space heaters use less energy than your home’s central HVAC system and allow you to heat targeted areas without raising the thermostat. Make sure to abide by all necessary safety precautions.

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