How To Ventilate An Old Attic

The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house.

How to ventilate an old attic.

Screw holes through both flanges. The soffit vents allow convective air movement from the soffits of the residence to the ridge vent. Space the holes 12 to 14 in. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Look at your eaves and roof. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. This is called passive ventilation. Multiply the area by 144 to convert it to square inches then divide the result by 300 to determine the amount of.

How to vent the attic of a house. Your roof vents may not look. Begin by making sure your existing system works photos 1 and 3 plugging major air leaks into the attic photo 2 and correcting any other of the common causes of poor attic venting. If you have either ice dams or moisture buildup improve your attic ventilation.

A hot ceiling tells you that the attic is acting like a solar oven raising your cooling bills and. A ridge and soffit ventilation system an extra 200 during reroofing will reduce attic temperature to around 100 degrees. If you don t see any attic vents on the roof or in the eaves you need to add some. This creates a natural air flow by drawing in the air from outside pushing it up and out through the vent at the top of the house.

Measure the length and width of your attic floor with a tape measure and multiply them together to get the area in square feet. If the attic. Raise the vent up to the soffit photo by merle henkenius next lay the strip vent down on a flat wood surface such as a plywood sheet or long 2 x 4 and drill 1 8 in dia. A passive ventilation system should have air.

A sign of roof leaks from ice damming or other causes. When reroofing use white or pale gray shingles instead of dark ones. Gable vents around 25 each plus 75 per vent for labor can lower attic temperatures about 10 degrees. In addition insulation baffles must be installed at the point where the attic floor meets the roofline to prevent the attic insulation from migrating into the cavities and restricting the airflow from the soffit vents.