Attic Without Ventilation

This moisture is released into the air inside the house from bathing cooking plants laundry and other causes.

Attic without ventilation. If the attic ventilation system is not a balanced combination of intake vents installed in the soffit under eave or at the roof s bottom edge and exhaust vents installed at or near the roof s peak the attic ventilation system will not be efficient and effective. They call this a venting drip edge. Normal vented air likes to enter the attic lower down near the bottom third of the attic and as it passes through it will exit higher up near the top third of the attic space. This will use more energy and make your air conditioner work harder which will increase your summer utility bill.

It s a diy project you can tackle in a weekend and the savings you ll get add up every year says toh general contractor tom silva. How to vent an attic with no eaves. The venting drip edge seems to be the easiest and most common way to go. If your attic has inadequate ventilation it can act like a heat trap and lead to premature shingle aging warp wood sheathing lead to mold issues and increase your hvac costs.

But if you ve got an unfinished attic giving it proper insulation is one of the simplest ways to keep a lid on your heating bill this season. When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still. One great alternative to a soffit ventilation system is to install an intake vent right at the lower edge of the roof. Without adequate ventilation moisture rises with the hot air and forms condensation on the inside of the roof deck.

Poor insulation is usually the culprit although if you enter the attic on sunny winter day your attic space can be warmed by the sun more than your furnace. On the principle that hot air rises the accumulated heat and moisture would rise to the attic and out the roof vents. Unless your roofing system has insulation on the roofing deck and is designed without ventilation your furnace should not be heating your attic. Typically you would have a gable vent on each end of the attic.

If i had an older home without soffits i would do everything possible to make sure that my attic is properly ventilated. For an attic without soffit vents you may have the option to use gable vents instead.