Parapet Roof Vents

Courtesy of max baker and the national research council of canada.

Parapet roof vents. Roof membrane temperatures ottawa canada summer day. If the one hour parapet exceeds the 30 inch minimum can the roof be vented to the inside as. We also have a parapet on a flat roof and the ventilation solution is not through the cladding but the design flows air over the parapet. Nothing built yet but in theory the solution should work well.

If the one hour parapet exceeds the 30 inch minimum can the roof be vented to the inside as long as the vents are 30 inches above the roof deck. Roof 2 wall vent incorporates the active weather foil technology and enhanced snow screen feature of our x 5 ridge vent line to stop rain and snow at the point of entry. The solution seems reasonable but we are definitely going to end up with a cold roof though not in the traditional sense. If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4.

Terminate roofing on parapet wall with mechanically fastened termination bar. Parapet ventilation for new construction attic area that provides a vapor retarder is 1sf ventilation per 300sf of attic area. Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications whichever is greater.