The Hidden Cost of Drafts: Why You Feel Cold (Even When the Heat’s On)
Imagine cranking up your thermostat and still feeling an uncomfortable chill throughout your house. According to the U.S. Department of Energy, up to 30% of a home’s energy can be lost through drafty windows and doors, making it harder to stay warm and driving up heating costs.
The good news? Flex Seal Draft & Insulation Tape provides a simple, mess-free solution to instantly block drafts, improve insulation, and help reduce energy loss. This flexible, clear tape helps seal gaps around windows and doors without affecting how they open and close.
Flex Seal Draft Tape applies in minutes and is completely removable, so you can take it off when the seasons change and reuse it whenever needed.
Ready to start blocking out cold drafts? Here’s how to get it done.
Materials Needed
- Flex Seal Draft & Insulation Tape
- Scissors
- Measuring tape
- Clean cloth or alcohol wipes
Important Information: Flex Seal Draft Tape works best on smooth, non-porous surfaces such as painted wood, glass, tile, metal, plastic, and fiberglass. Avoid using on painted walls, wallpaper, or drywall. Do not use on wet, oily, uneven, or nonstick surfaces.
Steps
1. Identify the Source of the Draft
Use your hand or a lit incense stick to trace around door and window frames. If the smoke wavers or you feel air movement, you’ve found the draft.
Flexpert Tip: Corners, gaps between sashes, and sliding door tracks are notorious for hidden air leaks.
2. Clean the Surface Area
Wipe down the frame edges with a clean cloth to remove dust, oils, and debris. For glass or metal surfaces, use a cleaning spray and dry thoroughly for best results.
3. Measure and Cut the Tape
Measure the area you’re sealing and cut the tape to size, working one strip at a time for the most accurate fit.
4. Apply with Firm Pressure
Peel off the backing and apply Flex Draft Tape with the adhesive side down and the non-adhesive flap covering the gap. Press the tape firmly into place for 15-30 seconds to ensure a secure bond.
5. Seal All Sides for Maximum Protection
Repeat the process on all four sides of the frame. Even small gaps, especially at the bottom of windows or doors, can cause noticeable drafts.
Flexpert Tip: Flex Draft Tape can withstand application temperatures ranging from 41°F to 113°F, with humidity between 30% and 70%.
Bonus Application: Seal an Attic Hatch to Keep Heat Downstairs
Pull-down attic ladders and ceiling hatches are common sources of heat loss, especially in older homes. Use Flex Seal Draft Tape along the perimeter of the attic hatch where it meets the ceiling frame to help create an airtight seal.
Note: Attic entries can vary, so we recommend assessing your layout to determine the best positioning.
Flex Seal Draft & Insulation Tape is available in a clear finish that blends seamlessly with window and door frames. Pick up a roll today and start sealing air leaks before the next cold front hits. It’s one of the fastest ways to create a warmer, more energy-efficient home this winter.







