'Air Sealing' Is Something Most Homeowners Are Unaware Of When It Comes To Reducing Heating And Cooling Bills; While Increasing Comfort.
In general, air sealing is a very cost-effective measure to to energy efficient solutions to existing homes today. In addition, it can save money by preventing maintenance problems such as freezing pipes, ice dams and roof rot. More about that in future blog articles.
Windows - Air leakage through or around existing double-hung windows is huge and can often be reduced by installing or adjusting sash locks, installing storm windows, and caulking window trim. Whenever possible, full replacement windows and inserts should be installed, caulked, and flashed in accordance with manufacturer’s instructions.
Sill - The following locations should be sealed with caulk or 1-part foam. (Where local codes permit exposed foam board or 2-part foam on band joists, these materials can double as insulation and air sealing materials. Foam board should be sealed in place with caulk or foam.) Gaps between top of foundation wall and sill plate. Gaps between sill plate, band joist, and subfloor. Gas and oil pipe penetrations, hose bibs, electrical weatherheads. Fan and dryer vents. Sidewall vents (use noncombustible materials and observe required clearance for non-zero clearance flues).
Electrical - Seal electrical penetrations of exterior walls (including the main weatherhead and boxes for outdoor lights) with caulk and weatherproof (tyvek) tape. Seal indoor electrical boxes or exterior walls with caulk and gaskets. Outlets: Seal electrical switch, outlet, and circuit breaker boxes to drywall with caulk or foam. Inexpensive insulating "inserts" can be installed behind electrical outlets to minimize air leakage from inner wall cavities. Switch Plates: Inexpensive insulating "inserts" can be installed behind switch plates to minimize air leakage from inner wall cavities.
Any Hole - Seal medicine cabinets and bath and kitchen ventilation fans with caulk or foam. Seal all exterior penetrations, such as porch light fixtures, phone, security, cable and electric service holes, with caulk or spray foam.
Plug Them All.
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