Minimize Air Leaks All Year Around

When you’re trying to keep your Boise home comfortable—whether it’s during our freezing Treasure Valley winters or scorching summer days—the last thing you want is air sneaking in (or out) through gaps around your windows and doors. Even small leaks can drive up energy bills and make your HVAC system work harder than it needs to.

At Gem Heating & Air Conditioning, we care about helping our neighbors save energy and stay comfortable. That’s why we’ve put together this simple guide to help you seal up those pesky leaks around windows and doors.

Step 1: Inspect for Drafts

On a windy day, walk around your home and check for drafts. Common signs include:

• Feeling cool or warm air around the edges of a window or door
• Seeing daylight peeking through cracks
• Curtains or blinds moving slightly when the window is closed

Pro tip: You can also use a lit candle or incense stick. Hold it near the frame and watch if the smoke wavers—that’s a sign of air movement.

Step 2: Apply Weatherstripping

For doors and windows that open and close, weatherstripping is your best defense. You can find different types at your local hardware store:

• Foam tape: Easy to apply and great for irregular gaps
• V-strip (tension seal): Perfect for the sides of doors or double-hung windows
• Door sweeps: Install on the bottom of exterior doors to block drafts

Make sure the surface is clean and dry before applying, and press firmly to ensure a tight seal.

Step 3: Use Caulk for Fixed Gaps

If you notice cracks around stationary parts of your window or door frames, caulk is the solution. Use a caulking gun and apply a smooth, even bead along the gaps where the frame meets the wall. For the best results:

• Choose exterior-grade caulk for outdoor use
• Use paintable caulk if you want to match your trim
• Smooth the bead with your finger or a caulk tool for a clean finish

Step 4: Check and Replace Old Seals

Over time, weatherstripping and caulk wear out. If yours is cracked, brittle, or peeling away, it’s time to replace it. Think of this as routine maintenance—just like changing your HVAC filters.

Step 5: Consider Professional Help

Sealing windows and doors goes a long way, but if you’re still noticing drafts or unusually high energy bills, your home may need additional solutions like insulation upgrades or HVAC efficiency improvements. That’s where we come in.

Final Thoughts from Gem Heating & Air Conditioning

Sealing up air leaks around your windows and doors is one of the simplest, most affordable ways to save money and stay comfortable in your Boise home. It not only keeps your heating and cooling system from working overtime but also improves overall indoor comfort year-round.

If you’d like a professional energy-efficiency assessment—or if your HVAC system is due for a tune-up—give Gem Heating & Air Conditioning of Boise a call. We’re proud to keep Treasure Valley homes comfortable no matter the season.