Knowing how to air seal a house is a cost-effective way to decrease heating and cooling costs and improve home comfort. The trick is to find the leaky areas and use the correct supplies to seal them up. Find air leaks Some leaks are easy to spot, such as under-door drafts, but others are more difficult to detect. To thoroughly identify all the air leaks in your home, seek a home energy audit. However, even without infrared cameras and a blower door test, you can find many leaks yourself. The most common locations for air leaks in the average home are around the following areas:
  • Door and window frames
  • Baseboards
  • Electrical outlets and switch plates
  • Fireplace dampers
  • Attic hatches
  • Ceiling and wall penetrations
  • Recessed light fixtures
  • Exhaust vents and fans
Caulking Your best friend when learning how to air seal a house is caulk. This flexible material seals gaps and cracks around window and door frames, baseboards, exhaust fans and other locations. Applying caulk requires a caulk gun and a steady hand. Practice the application on a scrap piece of newspaper before applying it to a permanent location. Weatherstripping Windows and doors are the primary installation locations for weatherstripping. The cushy material is adhesive on one side and creates a gasket-like seal when the movable door or window closes. When applying weatherstripping, always measure twice and cut once to avoid wasting material. Expanding spray foam Holes in the attic floor, wall penetrations and plumbing are all examples of spray foam applications. When hardened, spray foam provides excellent air sealing and insulating properties. It can even be applied to unfinished walls in place of insulation. Just keep in mind that exposure to spray foam vapors can be dangerous, which is why a professional is usually trusted to apply spray foam for air sealing and insulation purposes. This is just a glimpse of how to air seal a house. For more tips and information, please contact Gilman Heating and Cooling. We provide expect heating and cooling services to Richmond, Glen Allen and the surrounding areas.

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