Sealing Your Home For Winter

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Sealing Your Home For Winter

With winter lurking just around the corner, it’s important to keep your home properly sealed. Air leakage can create issues in any climate, but leaks in cold weather can rack up heating bills, cause drafts, and freeze pipes. The best way to avoid damage and inconvenience is prevention—so we’ve laid out the basics of sealing your home.

Identifying Air Leaks

The most accurate assessment of a home’s efficiency is with an energy audit or blower door test, usually done by a hired professional. However, you can still assess your home for air leaks with a thorough inspection.

Inspecting your home

Check your home’s exterior for any source of leakage.
Air leaks are most likely to occur where different materials meet, such as

Corners

Junction of foundation and exterior

Around chimneys

Any protruding outdoor structures (sinks, hoses, windows)

Inspect the interior of your home for these other common sources of air leaks:

Frames of windows and doors

Vents and fans attached to walls

Fireplace dampers

Outlets—electrical, cable, Ethernet, etc.

Mail slots

Weather stripping around doors

Window and door frames are frequent culprits of leakage. Start inspecting these by testing them for movement and listening for rattling noises. If the frame can shift—even if only when pressing on it—it could have a leak.

Sealing air leaks

If you think you’ve identified most of the leaks in your home, you can seal them with caulk or weatherstripping. Caulk works best for immovable objects like cracks or gaps in siding (less than ¼ inch wide) and leaks around ceiling fixtures, pipes, bathtubs, etc. Weatherstripping is designed for movable objects like doors and windows that open.

Basic application techniques

Before applying anything, be sure the area is clean and dry to prevent trapped moisture, and use a scraper to remove old paint or caulk.

Cut the tip of the caulk cartridge at a 45-degree angle.

Trial using caulk on a disposable surface if you’ve never used it before.

Clean up mistakes with a damp rag.

Allow about 24 hours for caulk to cure and follow all instructions on the package.

Sources:
“Air Sealing Your Home” U.S. Department of Energy (energy.gov)

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