Air Seal Windows with Weatherstripping

The Problem

Cold air leaks around windows in winter, hot air in summer. Your HVAC works overtime.

The Hack

Apply self-adhesive foam weatherstripping around window frames where you feel drafts. $3-5 per window at any hardware store.

Why It Works

Air leaks can account for 25-30% of heating/cooling costs. Sealing the most common leak points (windows and doors) has one of the best cost-to-savings ratios of any home improvement.

Pro Tips

• Feel for drafts on a windy day or use an incense stick
• Peel and stick foam strips take 5 minutes per window
• Also seal under exterior doors with a door sweep ($8)
• $10-20 total investment saves $50-100/year