Attic Ventilation Calculator Canada

Home attic vent calculator for years we have been working with architects and specifiers to ensure affordable roof ventilation that upholds building code standards.

Attic ventilation calculator canada.

Calculate or enter the square footage of the attic or area to be vented. There should also be a 50 50 balance of attic venting and roof venting. Vent calculator design your balanced ventilation system. Make sure you don t block any ventilation areas.

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. When installing your batts make sure to fit them tightly end to end as gaps in the insulation can greatly reduce your r value. If local code requires the 1 150 rule please double the requirements. Width or area.

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. If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation. The calculator will determine the number of square inches of net free area required for adequate attic ventilation based on the 1 300th general requirement. According to the national building code you need 1 sq.

According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space. Use this calculator to help determine the proper amount of attic ventilation based on u s. Gaf attic ventilation calculator. 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.

Select ventilation product flex roll ridge vent multi roll multi purpose vent rigid roll ridge. Of ventilation for every 300 sq. Here s how to determine your requirements. For an uninsulated attic it s important to install a vapour barrier on the interior side of your roof before filling it with insulation.

Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs. Use the duraflo ventilation calculator to determine your home s ventilation requirements. 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. Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph.