Attic Air Sealants
Patent Pending

Hot air rises. Without attic air sealing you are allowing warm air to escape from your home carrying with it your hard earned winter heating money.  Most people just add insulation to their attic - this will not stop the escaping warm air. The EPA estimates that the typical American home has enough leaks, holes and gaps to be equal to an open window every day of the year. That is significant. We need to seal the air in our conditioned living space from the unconditioned attic space. Every attic needs proper ventilation. We are not stopping the proper air exchange in the attic - we are only stopping the exchange between the house and the attic.

Hot air rises and carries with it dust particles that find their way into your attic. Your insulation acts as a filter and traps this dirt.  You will be able to spot leaks by finding dirty insulation. This will be on insulation that sits on the attic floor. I was skeptical at first – until I found an unusual amount of dirty insulation all over my attic. Places to look: the tops of walls, drilled electrical wire holes, electrical outlet boxes for lights, pipes, recessed lighting, bathroom vent fan, chimney flashing, dropped soffits over lighting, cabinets, and slanted stairway access.

When a home is built, the various contractors that are hired to build the home do not speak to each other. The framers, electricians, plumbers and HVAC workers do their work, creating holes, gaps, penetrations and other opening between the attic floor and the living space. Then, the insulation contractor comes in and covers up all these imperfections with blown-in fiberglass or batts.

These penetrations in the air and thermal boundary between the attic and the living space are completely ignored! Pipe and wire penetrations, can lights, chimney chases, top plates, drop down stairs and other gaps and cracks in the attic floor are places that the air your customers paid to heat in winter can leak into the attic. Since the attic is ventilated, this air is lost to the outside. Heat from super-hot attics in the summer can migrate into the home, increasing the cooling load in living spaces. Unsealed attic floors leads to rooms and homes that are uncomfortable and difficult to heat in winter and cool in summer.

The air flowing through all these gaps and cracks deposits dirt and dust in fiberglass batts. Dirty insulation has a reduced ability to resist heat flow between the attic and conditioned areas in the home, increasing heating and cooling loads, and making people too hot in summer and too cold in wintertime. Heating and cooling systems must run longer to deliver comfort to the home, increasing fuel and electric bills and wasting peoples' money.

Plus, warm moist air leaking through these gaps and cracks into cold, winter attics condenses on the underside of roof decks, which can lead to mold. This contributes to unhealthy indoor air quality, leading to sick homeowners!

Attics that are ventilated are considered outdoor space, and are very cold in the winter and extremely hot in the summer. Most attics do not have enough insulation on the attic floor to resist the movement of heat through the insulation. This makes the upstairs ceilings very hot, turning them to indoor radiant heaters during the summer. In wintertime, heated air rises to the top of the house, and conducts through the dry wall ceiling and into the attic, making it difficult to keep the air your customers paid to heat inside the home.

Many homes have heating and cooling systems and ductwork in their attics. Ducts in attics are a major contributor to uncomfortable and unhealthy homes. In summer, attics can be 130˚ or hotter. Uninsulated or under-insulated ducts in attics act as reheating lines. The cold air homeowners paid to cool gains heat from the very hot attic as the air moves through the ducts to the areas of the home that need to be cooled! The opposite happens in winter. Ducts act as re-chilling lines. The air homeowners paid to heat, loses that heat to the cold, cold attics as the air moves through poorly insulated duct systems to the conditioned parts of the home.

These systems are designed to produce and distribute a certain amount and temperature of air to heat and cool the home. Unfortunately, a large percentage of that air is lost along the way due to duct leakage. Up to 47% of the air your customers paid to heat or cool can be lost through holes, gaps and poor connections in ductwork. If there is an air handler in the attic, it can suck contaminates like mouse feces, mold spores and dust from the attic into the ducts. These contaminates are distributed right into the living areas, potentially causing and making it worse for allergy and asthma suffers.