Sealing cracks and openings from cold air (and warm air in the summer) can lower your utility payments and add value to your home. Published on December 30, 2014 in New Year’s resolutions for homeowners: Weather seal your homeFull resolution (500 × 375) Sealing cracks and openings from cold air (and warm air in the summer) can lower your utility payments and add value to your home. Sealing cracks and openings from cold air (and warm air in the summer) can lower your utility payments and add value to your home.