Attic Ventilation Calculator Canada

Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph.

Attic ventilation calculator canada. 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. Use this calculator to help determine the proper amount of attic ventilation based on u s. Of ventilation for every 300 sq. If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation.

Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs. For an uninsulated attic it s important to install a vapour barrier on the interior side of your roof before filling it with insulation. According to the national building code you need 1 sq. Make sure you don t block any ventilation areas.

Vent calculator design your balanced ventilation system. Here s how to determine your requirements. Calculate or enter the square footage of the attic or area to be vented. Select ventilation product flex roll ridge vent multi roll multi purpose vent rigid roll ridge.

Width or area. If local code requires the 1 150 rule please double the requirements. Gaf attic ventilation calculator. To find out how many vents you will need then round up to make sure you re getting enough ventilation.

There should also be a 50 50 balance of attic venting and roof venting. 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. When installing your batts make sure to fit them tightly end to end as gaps in the insulation can greatly reduce your r value. According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space.

All lomanco attic ventilation product requirements are based on the minimum standard 1 300 rule as set forth by the international building code ibc and the international residential code irc. Use the duraflo ventilation calculator to determine your home s ventilation requirements. 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. Home attic vent calculator for years we have been working with architects and specifiers to ensure affordable roof ventilation that upholds building code standards.