Air sealing is a seal that prevents the passage of air or vapor. Creating an air seal with foam insulation can work to block air movement both in and out of your home. The air leakage you may be experiencing can account for about 30% of your home’s heating and cooling costs.
Besides the financial aspect, sealing your home against air leakage is a simple way you can increase your comfort and simultaneously reduce carbon emissions by up to 25%. Air usually leaks through unsealed or poorly sealed doors and windows, unsealed vents, skylights, and exhaust fans, poorly fitted or shrunken floorboards, and gaps in or around ceiling insulation.
Air leaks also damage the structure of your house. The air that enters through the tiny gaps around your house can carry moisture, and this moisture can damage your home’s foundation. If you don’t already have the correct barrier to protect from outside vapor, the moisture that is absorbed can also result in the development of mold, water damage, and pest infestations.
Air sealing will especially help those who suffer from allergies or asthma, which is directly linked to pollutants and other allergens that are found in indoor air. Besides mold and pesticides, pollen and dust are other irritants that can irritate the airways.
Caulking and weather-stripping are two of the most common ways to air seal your home.
- Weather-stripping is the process of sealing openings around doors and windows to prevent air from entering and escaping. Foam, vinyl, and tape are some of the material that helps to block air flow.
- Caulking is a multipurpose material that seals the cracks created by caps, cracks, and joints. Caulk and seal air leaks where plumbing or electrical wiring comes through walls, floors, and ceilings.
Air that leaks out of your home is replaced by air that comes in from the outside, which creates unnecessary drafts within your home. The most effective solution would be to start by sealing the largest and most obvious leaks, and then moving on to the cracks that are more significant. When these are sealed, smaller leaks become more prominent. Larger leaks on the roof may be more difficult to locate and seal, so professional advice may be necessary.
You will notice a decrease in energy consumption and an overall improved air quality and be at ease knowing that your home is protected against mold and other air leak related damages. Air sealing will keep your home and its occupants healthy.
Written by Dami Falade