Did you know that leaky windows and doors can account for up to 30% of your home’s heating and cooling loss? That’s money slipping right through the cracks—every single month.
The good news? Sealing your home isn’t just affordable—it’s also one of the most impactful energy-saving upgrades you can do yourself. A few well-placed seals can significantly reduce your monthly utility bills, improve indoor comfort, and extend the life of your HVAC system.
This guide breaks down the steps for sealing windows and doors effectively, what supplies you’ll need, and when it’s time to call in a Puls pro for expert help.
Drafty doors and windows don’t just make your home feel chilly in the winter and stuffy in the summer. They create a hidden energy drain that causes your HVAC system to work overtime—leading to:
According to the U.S. Department of Energy, sealing air leaks can reduce heating and cooling costs by 10–20% on average. In homes with aging windows and doors, the impact can be even greater.
Windows are one of the biggest culprits when it comes to energy loss. Here’s how to spot and fix common window leaks.
Use a lit incense stick or a candle on a windy day. Slowly move it around the edges of your window frame. If the smoke flickers or pulls in one direction, you’ve found a leak.
You can also use:
For cracks where the window frame meets the wall (especially outside), use silicone-based weatherproof caulk to seal the gaps.
Window sashes (parts that slide or swing open) often leak where they meet the frame. Apply adhesive-backed foam, rubber, or vinyl weatherstripping to fill the gaps.
Make sure surfaces are clean and dry before applying for best adhesion.
In colder months, clear plastic window insulation kits can add an extra layer of protection. They’re especially effective for single-pane windows.
Doors see frequent use and movement, which means their seals wear down faster than you might expect.
Most exterior doors have a built-in seal that can be easily replaced.
Choose the right profile (V-strip, foam, rubber) for your specific door type.
A door sweep covers the gap between the bottom of the door and the threshold.
While many sealing tasks are beginner-friendly, there are some issues that require professional attention.
Call Puls if you notice:
A Puls handyman can help assess the damage, make structural repairs, replace compromised materials, and apply commercial-grade weatherproofing products that last longer and seal better.
Most people only think about sealing drafts in the winter—but it's just as important during the summer.
In hot climates, sealing up air leaks:
Doing a full seal check in both spring and fall ensures year-round energy savings.
For long-term protection, especially in older homes, consider these pro-level upgrades:
Temporary storm window kits or permanent inserts can increase efficiency without replacing your windows entirely.
Expanding foam sealants fill large gaps around pipe entries, basement windows, or irregular surfaces.
Old door thresholds can wear down over time. Installing a new one improves both the seal and the stability of your entryway.
A pro can walk your home’s perimeter and seal foundation cracks, gaps around outdoor faucets, attic vents, and more.
Sealing doors and windows is step one — but pair it with these for even better results:
If your windows or doors are more than 20 years old, damaged, or permanently warped, sealing alone might not cut it.
While full replacement is a bigger investment, it can:
Talk to a Puls expert for an honest assessment of whether repair or replacement makes more sense for your situation.
Drafts may be invisible, but their impact on your energy bills is very real.
Whether you need help sealing tricky gaps, replacing worn-out weatherstripping, repairing old door frames, or upgrading insulation, Puls is here to help.
🛠️ Book a Puls handyman today and enjoy:
📅 Schedule your appointment now and take the first step toward a cozier, more efficient home.