Attic Ventilation Worksheet Fresno

Other options to meet your attic ventilation needs are.

Attic ventilation worksheet fresno.

This cap features both a back draft damper and bird screen preventing outside air from entering the home and birds and small pests from entering duct work. 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. It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience. A minimum of 1 inch 25mm of air space shall be provided between the insulation and the roof sheathing.

See attic ventilation worksheet typical values for attic vents soffit vents 3 5 x 14 5 30 sq ins 3 5 x 22 5 50 sq ins 5 5 x 22 5 80 sq ins small dormer vents 50 sq ins large dormer vents 100 sq ins ridge vents per icc evaluation report. 1 300 of the attic floor area. See the benefits of attic ventilation a new roof is more than just shingles. See attached required attic ventilation shall be provided for all reroof projects as determined from the attic ventilation worksheet.

See attic ventilation worksheet typical values for attic vents soffit vents 3 5 x 14 5 30 sq ins 3 5 x 22 5 50 sq ins 5 5 x 22 5 80 sq ins small dormer vents 50 sq ins large dormer vents 100 sq ins ridge vents per icc evaluation report. Distributed equally around the structure. 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. Current cbc requirement is 1 300 of the attic floor area.

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. Calculations are based on 1 square foot of net free area for every 150 square feet of attic floor space. Attic ventilation calculator note. The net free ventilating area shall not be less than 1 300 of the area of the space ventilated.

Ventilation attic spaces cont. Select the roof pitch that is closest to yours. 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 rvk1a steel roof cap kit is an the rvk1a steel roof cap kit is an easy to install vent for ventilation fans bath rec room home gym etc.

Up to 6 12 7 12 to 10 12 11 12 and up. Calculate or enter the square footage of the attic or area to be vented. Enter the width and length of your home including overhang in feet.