Venting Low Pitch Roof

I m trying to vent a 1 12 roof that has not been vented.

Venting low pitch roof.

November 19 2014 9 08pm 1. About 12 x 18. For this design to work well on a low sloped not dead flat roof an outside air inlet is provided by a soffit or roof overhang built at the low end of the roof and a roof cavity air vent outlet is provided along the high or up slope end of the roof using a built up half ridge vent. Smartvent low slope application smartvent can be modified to provide intake ventilation for new roofs or re roofs through the fascia board for low slope roof with less than a 4 12 pitch.

For example a ridge vent on a low pitch roof will allow the wind driven water to enter the attic. Visiting my sister marlene in thunder bay this summer 2012 there was as usual a project like every other time. The intent of roof venting varies depending on climate but it is the same if you re venting the entire attic or if you re venting only the roof deck. Since most low slope roofs are not vented ice dams are much more likely to occur and cause extensive damages to the roof and the interior of the house as it is a lot easier for water to travel upward on a low pitch roof.

In a cold climate the primary purpose of ventilation is to maintain a cold roof temperature to avoid ice dams created by melting snow and to vent any moisture that moves from the conditioned. So it is essentially boxed in on 3 sides. The top of the roof meets the wall of the house and the 2 sides also meet walls.