Attic Ventilation Work Sheet

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

Attic ventilation work sheet. 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. Standard attic vents like af 50 s ventilation fans or solar powered attic fans. 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. Typically building codes include minimum requirements applicable to attic ventilation.

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. Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof. See the benefits of attic ventilation a new roof is more than just shingles. Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems.

Ventilation attic spaces cont. Code requirements the international building code. Other options to meet your attic ventilation needs are. 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.

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. Intake vents located at the lowest part of the roof under the eaves allow cool. 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. Calculate or enter the square footage of the attic or area to be vented.

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. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. 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. The net free ventilating area shall not be less than 1 300 of the area of the space ventilated.

A minimum of 1 inch 25mm of air space shall be provided between the insulation and the roof sheathing.