The ridge vent is installed on the peak with nails and shingled over for aesthetic purposes.
Attic ventilation worksheet.
This yields a total area of 1 104 square feet.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Ridge vent must me installed per the manufactures instructions.
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.
Insulation at least r 38 or more is there for heating and.
Best ventilation is open soffit venting to a open vented ridge vent.
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.
Of attic space 1 150 ventilation ratio measured at the attic floor level ceiling.
Gaf attic ventilation calculator.
Select the roof pitch that is closest to yours.
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.
Ridge vents are one of the easiest ways to meet roof venting requirements.
Attic ventilation calculator note.
Most building codes require a ratio of 1 150 ventilation space to attic floor space.
Enter the width and length of your home including overhang in feet.
It can do both.
Calculate or enter the square footage of the attic or area to be vented.
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.
Standard attic vents like af 50 s ventilation fans or solar powered attic fans.
Other options to meet your attic ventilation needs are.
See attached required attic ventilation shall be provided for all reroof projects as determined from the attic ventilation worksheet.
For large volume attics such as where roof slopes are greater than 8 12 designers also should consider increasing the amount of attic ventilation to account for the additional volume of attic space.
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.
Let s look at the following example.
Intake vents located at the lowest part of the roof under the eaves allow cool.
Use this calculator to help determine the proper amount of attic ventilation based on u s.
Up to 6 12 7 12 to 10 12 11 12 and up.
Jones has an attic space that measures 23 feet by 48 feet.
You can also contact your local municipality to check on building code in your area.
