How Do I Vent My Attic

Here are four signs of an unventilated or under ventilated attic.

How do i vent my attic.

It does this by creating an area of low pressure on both sides of the vent which pulls the hot air right out of the attic. Simply secure the vent into place with screws and your vent is complete. So if your attic is 25 by 15 you ll need 2 5 feet of vent space. Building codes typically require 1 square foot of venting space for every 150 square feet.

How to check attic ventilation calculate net free vent space. The use of an exhaust vent in conjunction with an intake vent uses the natural forces of wind pressure and thermal effect collectively known as the stack effect to ventilate the attic space. Hot air exhaust vents located at the peak of the roof allow hot air to escape. After creating a space for the vent line the hole with caulk and place the vent inside.

Inspect the vent openings. If your attic is not sufficiently vented you probably won t have to look very hard to find signs. These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and. Set your circular saw at 1 8 inch 0 4 cm greater than the thickness of your roof s soffit when installing an intake vent.

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Exhaust vents which are located near or on the ridge line of the roof and allow air to leave the attic. Touch your ceiling on a warm sunny day. Most ridge vents use an external baffle system that s designed to pull in cool air and push out warm air regardless of wind direction and force outside.

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. Then divide the total area by 150 to find the total amount of vent space needed for your attic. Look at your eaves and roof. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Then cut out your desired location and screw the vent directly into the soffit. If you don t see any attic vents on the roof or in the eaves you need to add some. 25 x 15 375 and 375 140 2 5. To determine the area multiply the length times the width in feet.