Nothing drives up winter heating costs like cold drafts sneaking into your home. Those little air leaks around windows, doors, and other gaps force your furnace to work overtime. The good news is you can seal your home to stop drafts and save money – often with simple DIY fixes. Here’s a guide to draft-proofing your home before New Jersey’s deep winter cold arrives:
Find the Drafts: Common Culprits
First, hunt down where the drafts are coming from. Common culprits include:
Windows and Doors: Especially older ones with worn weatherstripping. On a windy day, feel around the edges for cold air or look for daylight around frames.
Attic Hatches and Basements: Often neglected, attic pull-down stairs or basement rim joists can leak a lot of air.
Electrical Outlets and Fixtures: Exterior wall outlets, switch plates, and recessed lights can have gaps that allow cold air to enter.
Fireplace Dampers: If not sealed when not in use, your chimney essentially becomes an open window, allowing warm air to escape.
Plumbing & Wiring Penetrations: Under sinks or through walls (such as behind a tub or around a dryer vent), where pipes and cables enter – these holes are often loosely filled.
Walk through on a cold day and note any cool breezes. Alternatively, use a simple trick: hold a lit incense stick or candle and watch the smoke – if it wavers or gets sucked toward a crack, you’ve found a leak.
Weatherstripping Doors and Windows
One of the easiest high-impact fixes is installing or replacing weatherstripping on doors and windows. For doors, inspect the condition of the rubber or foam strips along the sides and top, as well as the sweep at the bottom. If you can see light or feel air, replace those seals. Quality adhesive-backed foam or rubber weatherstrips are inexpensive and straightforward to apply. Adding a new door sweep (or an under-door draft blocker) can prevent cold air from sneaking in below the door. For windows, use self-stick foam weatherstrip tape along the sash or install a new V-strip along the sides. Proper weatherstripping can significantly reduce drafts and save up to 10% on heating costs on its own.
Caulk Gaps and Cracks
Grab a caulk gun and seal the smaller gaps that contribute to significant heat loss. Use durable silicone or acrylic caulk around window and door frames (both indoors and outdoors) where the trim meets the wall. Caulk along baseboards if you feel drafts at floor level. Don’t forget less visible spots, such as around pipe penetrations (where the gas line or plumbing enters the house), around vent ducts, and any cracks in the foundation or sill plate. A tube of caulk is cheap and can seal dozens of draft points – it’s one of the highest ROI fixes for comfort. For larger gaps (wider than ~1/4 inch), use expanding foam sealant carefully to fill the void (for example, significant gaps around a dryer vent or an outdoor faucet pipe).
According to the EPA, combining air sealing and insulation can save the average homeowner approximately 15% on heating and cooling costs. Even just sealing leaks alone yields noticeable savings and makes your home feel less chilly.
Don’t Forget the Attic and Basement
Sealing drafts isn’t just about living spaces – a significant amount of heat escapes through attics and basements, often going unnoticed. Weatherstrip and insulate your attic hatch or pull-down stairs, as this is usually just a thin plywood panel between you and a frigid attic. Use adhesive insulation or a specialized attic stair cover if available. Check the attic for obvious gaps, such as around the chimney, plumbing stacks, or where walls meet the attic floor. Plug these gaps with fire-safe caulk or foam.
In the basement or crawl space, seal the rim joist area (where the wood frame sits on the foundation). This area commonly has gaps around each joist or where utility lines exit the building. Use foam board insulation cut to fit between joists and seal edges with spray foam for an excellent solution. Also, seal around the basement windows or the sill plate. Cold air entering the low-pressure area will rise and chill the entire house.
Use Door Sweeps and Draft Stoppers
For any exterior door, install a good door sweep to block the bottom gap where a lot of cold air can slide in (and warm air out). There are bristle sweeps or rubber fin types – both work if properly sized to meet the threshold. For added measure (or interior doors to unheated areas, such as a garage), use draft snakes or door draft stoppers – those fabric tubes that can be placed along the bottom. They’re an easy way to stop a cold draft from sneaking under a door you might not open often in winter.
Upgrade Window Insulation
Windows can contribute significantly to heat loss, even when closed, as cold air can infiltrate through gaps or the glass itself. To combat this in winter:
Apply window insulation film: This is a transparent, plastic shrink film that you can place on the interior of leaky windows. It creates an air barrier that cuts drafts. A simple kit with double-sided tape and plastic film can make drafty windows far more snug (and it’s removable in spring).
Use thermal curtains or cellular shades: These add insulating value. Keep them open on sunny days to enjoy free heat, but close them at night to trap the warmth in. Insulating drapes can reduce heat loss through windows by around 10% or more on their own.
Install storm windows: If you have older single-pane windows, adding storm windows (interior or exterior) creates a buffer of air that improves insulation and reduces infiltration.
Maintain and Upgrade Insulation
Air sealing and insulation go hand-in-hand. Once you seal the air leaks, ensure your attic has sufficient insulation for our New Jersey climate (the EPA recommends a minimum of R-38 to R-49 for attics in this region). Top up any thin spots or consider adding another layer of blown-in or batt insulation after sealing leaks. Similarly, insulate accessible crawl space walls or the underside of floors above crawl spaces if they have not already been done. While insulation is a bigger project, it’s key to keeping the heat you paid for inside the house. The Department of Energy notes that proper insulation and air sealing together could save homeowners up to 15% on heating and cooling bills – that’s substantial!
Benefits: Comfort and Cost Savings
Once you chase down and seal these drafts, you’ll likely notice an immediate difference. Rooms will feel less “chilly” or prone to cold spots, and your furnace won’t have to cycle on as frequently. By eliminating cold air infiltration, you maintain a more stable indoor temperature. Beyond comfort, you’re preventing 5–20% of heat from escaping, which can equate to similar percentage savings on your heating bill. Many New Jersey homeowners see significantly lower utility bills after a thorough draft-proofing.
Moreover, a tighter home means less strain on your furnace, potentially extending its life. And you’ll reduce the chance of issues like frozen pipes in drafty areas.
Final Tips
Install foam gaskets behind outlet covers on exterior walls for better insulation These inexpensive inserts block drafts that often leak through light switches and outlets.
Close fireplace dampers when not in use, and consider a chimney balloon or plug if you never use the fireplace. An open chimney damper can suck vast amounts of warm air out (it’s like an open window in winter).
Monitor indoor humidity – a drafty home tends to be dry. Sealing leaks may slightly increase indoor humidity, making the space feel warmer. Aim for a humidity level of 30–50% for optimal comfort.
After sealing, have your HVAC system balanced if needed. With fewer drafts, your heating distribution may require minor adjustments to ensure even heating, now that the home’s envelope is tighter. Sealing your home against drafts is one of the best winter preparations you can do. A weekend of caulking, weatherstripping, and minor fixes can yield a home that’s cozier and more energy-efficient all winter long. Your furnace will appreciate it, and so will your wallet when the heating bills arrive. By stopping those sneaky drafts, you’ll stay warm and comfortable while keeping heating costs under control.
