Intake vents located at the lowest part of the roof under the eaves allow cool.
Attic ventilation work sheet.
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.
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.
If you are in the puget sound area of washington state and would like to have a free attic ventilation evaluation or roof estimate please contact us at 253 445 8950 or fill out our quick estimate form.
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.
Ventilation attic spaces cont.
Code requirements the international building code.
It is important that air movement occurs and is not impeded by any framing members of the.
If you don t know how your roof vents work or if you re unsure about your attic ventilation in general you should talk to a roof inspector about your current system and any inherent weaknesses that may be at.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
A ridge vent is a ventilation strip that is placed along the ridgeline of the home.
Other options to meet your attic ventilation needs are.
The roofing industry also has practical guide lines for attic ventilation.
See the benefits of attic ventilation a new roof is more than just shingles.
Calculate or enter the square footage of the attic or area to be vented.
The attic ventilation worksheet shall be completed by the contractor applicant to determine the number of vents required to comply with minimum building code requirements.
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.
Standard attic vents like af 50 s ventilation fans or solar powered attic fans.
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.
The net free ventilating area shall not be less than 1 300 of the area of the space ventilated.
Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof.
Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems.
