Our weatherization services include sealing air leaks around A/C ducts, doors, windows, ducts, outlets, electrical boxes, chimney flues and attic chases. Contractor selection is key when weatherizing your home because professionals like Bison Insulation understand that the house is a system and that performing air sealing can sometimes have dynamic results. Bison Insulation is the right choice for your home weatherization because we have been a trusted name in the industry for decades and we warranty our workmanship.
Why Air Seal?
Air sealing is important, not only because drafts are uncomfortable, but also because air leaks carry both moisture and energy, usually in the direction you don’t want. For example, air leaks can carry hot humid outdoor air into your house in the summer, or can carry warm moist air from a bathroom into the attic in the winter. In addition, if your home is leaky, you are paying to recondition outside air on a constant basis. Reducing air leakage can reduce heating and cooling costs up to 50% and contribute to better comfort and improve occupant health and safety. Air sealing also comes with the tertiary benefit of extending air conditioning equipment life.
Where Is Your House Leaking?
Most homeowners are aware that air leaks into and out of their houses through small openings around doors and window frames and through fireplaces and chimneys. Air also enters the living space from other unheated parts of the house, such as attics, basements or crawlspaces. The air travels through:
- Any openings or cracks where two walls meet, where the wall meets the ceiling, or near interior door frames
- Gaps around electrical outlets, switch boxes, and recessed fixtures
- Gaps behind recessed cabinets, and furred or false ceilings such as kitchen or bathroom soffits
- Gaps around attic access hatches and pull-down stairs
- Behind bath tubs and shower stall units
- Through floor cavities of finished attics adjacent to unconditioned attic spaces
- Utility chaseways for ducts
- Plumbing and electrical wiring penetrations
These leaks between the living space and other parts of the house are often much greater than the obvious leaks around windows and doors. Since many of these leakage paths are driven by the tendency for warm air to rise and cool air to fall, the attic is often the best place to stop them. It’s important to stop these leaks before installing attic insulation because the insulation may hide them and make them less accessible. Usually, the attic insulation itself will not stop these leaks and you won’t save as much as you expect because of the air flowing through or around the insulation.
- DUCTWORK – Air duct leakage is one of the largest contributors to high heating and cooling bills and poor indoor air quality.
- DUCT CHASES / CHIMNEY FLU CHASES / FURR DOWNS – Uncapped chases are usually the largest contributors to home air infiltration because they are the largest holes in the attic.
- WINDOWS AND DOORS – Small cracks around doors and windows can contribute to a significant amount of air infiltration.
- OUTLETS – Each outlet and light switch at an interior wall is a likely area of air leakage/infiltration if top plates are not correctly sealed from the attic.
- RECESSED LIGHTING – Recessed lights can be a very large contributor to air infiltration.