If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the.
How to vent an attic space.
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.
Whole house fans powered attic fans.
These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and.
Venting the roof deck.
Attic vents were developed to help deal with this problem of too much heat accumulating in unfinished attics where it doesn t belong.
If you don t see any attic vents on the roof or in the eaves you need to add some.
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.
Here are four signs of an unventilated or under ventilated attic.
Obviously more research is needed but here s what we do know.
A hot ceiling tells you that the attic is acting like a solar oven.
So if your attic is 25 by 15 you ll need 2 5 feet of vent space.
Look at your eaves and roof.
Don t avoid ventilating your attic for fear you re letting cold air into the house.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
Touch your ceiling on a warm sunny day.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
Outside air enters the attic space through soffit or eave vents rises through the attic space as it warms and exits through vents that are positioned at or near the top.
Your actual living space is sealed.
To determine the area multiply the length times the width in feet.
To choose the proper ventilation system for your attic you ll first need to know the total area of your attic.
If you want to turn the attic into conditioned space or you ve got a room with a cathedral vaulted ceiling insulating and ventilating become more complex.
The venting path is essentially the same air flows up from the eaves and out at the ridge but creating a vent channel under the roof deck can be challenging.