Air sealing the envelope or shell of your home, including the exterior walls, ceiling, windows, doors and floors, is often one of the most cost effective ways to improve your home’s energy efficiency and comfort. Air sealing should always be performed before any insulation is added. It can save 10 percent or more on your total annual energy bills.
Attic ventilation is essential in making any home more comfortable while lowering energy costs. Air-conditioners can run less and won’t have to work as hard. Humid, stagnant air can be removed, drawing fresh dry air across the surfaces. Your attic can be drier and cooler–the perfect tools to help fight potential moisture damage. Attics get hot because your roof takes the full brunt of the Sun's energy. As the Sun beats down on your roof, the shingles heat up–reaching temperatures up to 150°F. This heat is transferred through the shingles, to the roof deck, to the lumber and rafters, and to anything else inside the attic. All of these materials will absorb and radiate the heat.
Prolong the life of your roof–and your home.
Of all the reasons to ventilate an attic the most important is to preserve the structural integrity of the roof. At all times during the year, heat and moisture accumulate in every attic. When left uncontrolled, excess heat and moisture can result in significant damage to the roof and structure–reducing normal life expectancy. Proper ventilation validates some shingle manufacturers’ warranty and protects the investment in your home.
Lower air-conditioning costs.
Keeping your house cool can be a real challenge when your attic is too hot. The heat from the attic can find its way through the insulation or the A/C duct work to your living space, causing your air-conditioning system to run longer and work harder.
By lowering the attic temperature, you can save money on your cooling expenses. The exact savings depends on several factors such as the color of your roof, whether the home is shaded, the amount of attic insulation, and the efficiency of your cooling system