
It may be time because sealing drafty windows and doors can improve energy efficiency, enhance comfort, and reduce heating or cooling costs. Here’s a step-by-step guide to help you seal them effectively:
Identify Drafts
Focus on problem areas: Common culprits include gaps around frames, sashes, and thresholds.
Inspect for leaks:
Close windows and doors and check for light peeking through the edges.
Use the back of your hand around windows and doors, it senses the draft better than your palm.
Use a lit candle or incense stick to detect air movement—flames or smoke will flicker near drafts.
Gather Materials and tools
You’ll need:
Weatherstripping: For movable parts like sashes and doors.
Caulk: For stationary parts like frames or cracks.
Door sweeps: For the bottom of doors.
Window insulation kits: These include plastic film to cover entire window panes.
Foam sealant: For larger gaps and holes.
Backer rod: for larger holes or gaps.
Tools: Caulking gun, utility knife, scissors, measuring tape.
Apply Seals
For Windows:
Weatherstripping:
Use adhesive foam or V-strip weatherstripping to seal movable parts of the window.
Apply along the top, bottom, and sides where the sashes meet.
Caulking:
Clean and dry the edges before applying caulk.
Seal gaps between the frame and wall with quality silicone or acrylic latex caulk.
Window Film (Optional for old windows):
Apply clear plastic insulation film over the entire window. Use a hairdryer to shrink and tighten it.
For Doors:
Weatherstripping:
Apply foam or rubber weatherstripping along the sides and top of the doorframe.
Door Sweep:
Install a door sweep or draft stopper along the bottom edge of the door.
Caulking:
Seal gaps around the door frame with caulk.
Address Large Gaps or Cracks
Use expanding foam sealant for larger cracks in walls or gaps around windows/doors that weatherstripping and caulk cannot address. Use backer rod for even larger cracks with caulking over backer rod.
Test the Results
Re-check for drafts using the candle or smoke test.
Adjust or reinforce seals as necessary.
Additional Tips
Replace worn-out weatherstripping or door sweeps periodically.
Check for drafts seasonally, as materials can shrink or degrade over time.
Consider upgrading to energy-efficient windows and doors if drafts persist.
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