Attic Ventilation Calculator Canada

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.

Attic ventilation calculator canada.

Here s how to determine your requirements. Gaf attic ventilation calculator. If local code requires the 1 150 rule please double the 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.

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. 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. According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space. Of ventilation for every 300 sq.

Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs. Calculate or enter the square footage of the attic or area to be vented. To find out how many vents you will need then round up to make sure you re getting enough ventilation. 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.

Select ventilation product flex roll ridge vent multi roll multi purpose vent rigid roll ridge. When installing your batts make sure to fit them tightly end to end as gaps in the insulation can greatly reduce your r value. Make sure you don t block any ventilation areas. For an uninsulated attic it s important to install a vapour barrier on the interior side of your roof before filling it with insulation.

Divide your square footage by 300 sq. According to the national building code you need 1 sq. Vent calculator design your balanced ventilation system. There should also be a 50 50 balance of attic venting and roof venting.

Home attic vent calculator for years we have been working with architects and specifiers to ensure affordable roof ventilation that upholds building code standards. If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation. Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph. Use the duraflo ventilation calculator to determine your home s ventilation requirements.