How Do You Vent An Attic

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.

How do you vent an attic.

Calculate net free vent space building codes typically require 1 square foot of venting space for every 150 square feet of attic space. Attic venting process mark the spacing of your soffit vents in between the rafters or joists. Using a saw cut holes that are a tad smaller than the vent you re using. Secure the vents in place using the included hardware.

Please see an enlargement in additional information below. Screw holes through both flanges. Whole house fans powered attic fans. Air chutes when combined with soffit vents and a ridge vent will help prevent problems with condensation and ice dams.

To effectively ventilate your roof create a 1 in. 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. Clear any debris or insulation blocking the ventilation holes. 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. 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. Enter square footage calculate or enter the square footage of the attic or area to be vented. 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.

The venting space should be equally divided between intake. 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. 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. Typically you would have a gable vent on each end of the attic.

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. After creating a space for the vent line the hole with caulk and place the vent inside. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Airspace from the soffit to the ridge by installing a continuous air chute in each rafter bay.

Simply secure the vent into place with screws and your vent is complete.