How To Ventilate An Old Attic

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.

How to ventilate an old attic.

When reroofing use white or pale gray shingles instead of dark ones. If you don t see any attic vents on the roof or in the eaves you need to add some. A ridge and soffit ventilation system an extra 200 during reroofing will reduce attic temperature to around 100 degrees. 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.

Multiply the area by 144 to convert it to square inches then divide the result by 300 to determine the amount of. 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. This is called passive ventilation. Touch your ceiling on a warm sunny day.

Space the holes 12 to 14 in. A passive ventilation system should have air. Hot air exhaust vents located at the peak of the roof allow hot air to escape. 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.

Gable vents around 25 each plus 75 per vent for labor can lower attic temperatures about 10 degrees. A sign of roof leaks from ice damming or other causes. If the attic. Measure the length and width of your attic floor with a tape measure and multiply them together to get the area in square feet.

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Also make sure your attic is ventilated. Your roof vents may not look. Attic ventilation keeps your house cooler in summer and it prevents moisture from building up in winter and ruining your roof framing and insulation.

The soffit vents allow convective air movement from the soffits of the residence to the ridge vent. 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. If you have either ice dams or moisture buildup improve your attic ventilation. Screw holes through both flanges.