How Do You Vent An Attic

After creating a space for the vent line the hole with caulk and place the vent inside.

How do you vent an attic.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. Space the holes 12 to 14 in. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Enter square footage calculate or enter the square footage of the attic or area to be vented.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Using a saw cut holes that are a tad smaller than the vent you re using. Simply secure the vent into place with screws and your vent is complete.

For a gable vent you start by removing the siding and sheathing in your determined area with a circular saw avoiding any unnecessary contact to the gable studs. Secure the vents in place using the included hardware. To effectively ventilate your roof create a 1 in. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Clear any debris or insulation blocking the ventilation holes. Whole house fans powered attic fans. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. 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.

The venting space should be equally divided between intake. Typically you would have a gable vent on each end of the attic. Airspace from the soffit to the ridge by installing a continuous air chute in each rafter bay. Fans and vents may be installed on the roof system that will draw the air out of the attic space and exhaust it to the exterior.

Please see an enlargement in additional information below. 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. Attic venting process mark the spacing of your soffit vents in between the rafters or joists. Air chutes when combined with soffit vents and a ridge vent will help prevent problems with condensation and ice dams.

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.