Attic Ventilation Work Sheet

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Attic ventilation work sheet.

Other options to meet your attic ventilation needs are. 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. Code requirements the international building code. A minimum of 1 inch 25mm of air space shall be provided between the insulation and the roof sheathing.

Intake vents located at the lowest part of the roof under the eaves allow cool. 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. See the benefits of attic ventilation a new roof is more than just shingles. A ridge vent is a ventilation strip that is placed along the ridgeline of the home.

See attached required attic ventilation shall be provided for all reroof projects as determined from the attic ventilation worksheet. 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. The net free ventilating area shall not be less than 1 300 of the area of the space ventilated. 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.

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. Ventilation attic spaces cont. Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems. It is important that air movement occurs and is not impeded by any framing members of the.

Standard attic vents like af 50 s ventilation fans or solar powered attic fans. 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. Calculate or enter the square footage of the attic or area to be vented. Typically building codes include minimum requirements applicable to attic ventilation.

The roofing industry also has practical guide lines for attic ventilation.