However the utility of attic ventilation fans is actually quite a controversial topic.
Attic ventilation requirements and benefits.
Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems.
Here are some of the myths and the facts you need to know about attic ventilation.
Balanced ventilation balanced ventilation is achieved when intake and exhaust allow for same amount of airflow because the natural forces of air pressure create a push pull effect around your roof.
It is important that air movement occurs and is not impeded by any framing members of the.
Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.
A ridge vent is a ventilation strip that is placed along the ridgeline of the home.
Code requirements the international building code.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.
About attic ventilation natural attic ventilation.
More attic ventilation is good.
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.
Foot of ventilation for every 150 sq.
Good insulation reduces fan effectiveness.
The roofing industry also has practical guide lines for attic ventilation.
Intake vents located at the lowest part of the roof under the eaves allow cool.
Understanding whether your home could benefit from some form of attic ventilation might just be if not a life saver a roof saver.
The downside of attic ventilation fans.
Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.
Attic ventilation requirements how many attic vents your roof needs industry standard for proper attic ventilation recommends for no vapor retarder type of attic insulation no paper plastic or aluminum layer between the attic floor and insulation layer 1 sq.
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.
About 90 percent of homes in the us have unreasonably high levels of moisture.
See the benefits of attic ventilation a new roof is more than just shingles.
Typically building codes include minimum requirements applicable to attic ventilation.
