How To Ventilate An Old Attic

Look at your eaves and roof.

How to ventilate an old attic. Space the holes 12 to 14 in. 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. The soffit vents allow convective air movement from the soffits of the residence to the ridge vent. A ridge and soffit ventilation system an extra 200 during reroofing will reduce attic temperature to around 100 degrees.

Your roof vents may not look. A passive ventilation system should have air. 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. Also make sure your attic is ventilated.

If you don t see any attic vents on the roof or in the eaves you need to add some. If you have either ice dams or moisture buildup improve your attic ventilation. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Touch your ceiling on a warm sunny day.

When reroofing use white or pale gray shingles instead of dark ones. A hot ceiling tells you that the attic is acting like a solar oven raising your cooling bills and. If the attic. Screw holes through both flanges.

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. Multiply the area by 144 to convert it to square inches then divide the result by 300 to determine the amount of. Measure the length and width of your attic floor with a tape measure and multiply them together to get the area in square feet. 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.

This is called passive ventilation. A sign of roof leaks from ice damming or other causes. 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. Gable vents around 25 each plus 75 per vent for labor can lower attic temperatures about 10 degrees.