Attic Ventilation Requirements Canada

Of net free area of exhaust needed at or near the ridge.

Attic ventilation requirements canada.

It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience. 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. 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. 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.

Typically building codes include minimum requirements applicable to attic ventilation. Of net free area of intake needed at or near the soffit. It reduces summer heat buildup prolonging the life of roofing and reduces air conditioner loads. The following are the requirements taken directly from the irc.

Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems. 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. Code requirements the international building code. The roofing industry also has practical guide lines for attic ventilation.

Attic ventilation serves a number of purposes. It is important that air movement occurs and is not impeded by any framing members of the. 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. Heat build up the canadian asphalt shingle manufacturers association has issued a bulletin titled proper ventilation for asphalt shingle covered roofs.

Careful attention to the need for adequate ventilation is necessary when water and vapour impermeable roof covers are applied over attic and roof spaces. See the benefits of attic ventilation a new roof is more than just shingles. The majority of the requirements related to attic ventilation have not changed much from the previous editions. For the 1 150 attic ventilation requirement simply double the amount of exhaust and intake calculated.

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. 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. A ridge vent is a ventilation strip that is placed along the ridgeline of the home.