Venting Low Pitch Roof

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.

Venting low pitch roof.

For example a ridge vent on a low pitch roof will allow the wind driven water to enter the attic. So it is essentially boxed in on 3 sides. Although surprisingly there was only one leak in the old roof. The top of the roof meets the wall of the house and the 2 sides also meet walls.

I m trying to vent a 1 12 roof that has not been vented. Look at our fasciavent which has been designed more specifically for metal roofs and provides the intake ventilation for flat to 16 12 pitches. 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. 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.

November 19 2014 9 08pm 1. Reshingling a low slope roof and a few things not to do this article covers reshingling a low sloped roof and a few things you should avoid when shingling such a roof. 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.