Keeping your home warm in the winter isn’t just about cranking up the thermostat—it’s about keeping the heat you already have from slipping away. Drafty windows can undermine your comfort and drive up energy bills, but a few quick-seal window solutions can make a big difference.
Below, you’ll find easy, effective, and budget-friendly window sealing tips and home winterization ideas to help improve energy efficiency, boost home heating, and banish those cold winter drafts for good.
Remember: Energy efficiency is worth it. Sealing leaks can save you 10% on your annual energy bills, according to ENERGY STAR.
DIY Window Sealing Options
Head to your local hardware store and you’ll find plenty of DIY window insulation tools. Here are a few of the most effective methods for how to seal your windows quickly and affordably so you can enjoy a warmer winter house:
1. Caulking
Want to quickly seal windows? Use caulk.
Caulking is best for sealing gaps around window frames and trim. Stick with silicone or polyurethane caulk for outdoors, but choose latex caulk for indoor use—it’s easy to apply and clean.
Tip: Clean surfaces before applying to ensure a proper seal. Check out our window cleaning tips to learn more!
2. Foam insulation behind trim
For a deeper seal, remove the interior trim and use spray foam or fiberglass insulation between the trim and frame. Reattach the trim and seal again with caulk to lock in warmth.
3. Weatherstripping
Foam or rubber weatherstripping sticks to the window sash or frame to block air leaks, cutting down on those freezing drafts. Weatherstripping is ideal for temporary seals if you’re not looking for a permanent modification.
4. Plastic film window kits
Here’s a great strategy if you want to know how to temporarily seal a window: Create an airtight seal using clear plastic sheeting and a hairdryer! Plastic window kits are great for quick window sealing in colder months, and they’re easy to remove in spring.
5. Window coverings for extra insulation
Window coverings do more than decorate—they can insulate. Use these options to add another layer of protection:
- Thermal Curtains or Energy-Efficient Shades. These are designed to reduce heat loss through glass. Look for cold-resistant or insulated options in home goods or big-box stores.
- Layered Drapes. These add thick insulation with multiple layers of curtains. The more material you hang, the better the heat retention inside the room.
- Draft Snakes. These are relatively simple in design, but incredibly impactful. They’re simply fabric tubes filled with rice or beans to block drafts at the window sill or base of doors. You can buy them online or make your own from leftover fabric scraps.
6. Storm windows: a long-term investment
If you’re looking to upgrade, interior storm windows can offer reusable, season-long protection. These panels fit snugly inside your existing frames to reduce air leaks and improve window insulation without replacing the original windows.
Not Sure Where the Drafts Are Coming From?
If you’re not sure where your drafts are coming from, consider scheduling a professional energy audit. These experts use infrared cameras and blower door tests to detect hidden leaks throughout your home, including around windows, doors, and even outlets.
These pros definitely know how to seal leaky windows—and they have specialized equipment and tools to make it happen!
Stay Warm, Save Money
With a few smart window sealing tips, you can improve home heating efficiency, reduce energy bills, and enjoy a cozier winter—without a costly remodel. Whether you're sealing temporarily with film or investing in storm windows, every layer counts.
And remember: Unexpected appliance or system breakdowns can still happen—no matter how energy-efficient your home is. A 2-10 Home Service Plan offers year-round protection to keep you covered when things go wrong.
2-10 HBW offers comprehensive Home Warranty coverage for homeowners. Let us help you protect your home.
FAQ: Window Sealing Tips
How much can sealing your windows save you?
Sealing your windows and other leaks can save you 10% on your annual energy bills.
What are the best DIY window sealing options?
Some of the best DIY window sealing solutions include:
- Caulk
- Foam insulation
- Weatherstripping
- Plastic film
- Window coverings
- Storm windows
How do you find where your drafts are coming from?
Hire a professional with the proper equipment to find your leaks.
