Venting A Porch Roof

Soffit vents have much less risk of water entry.

Venting a porch roof.

Porch roof venting posted in general discussion on may 5 1999 10 54am i ll be soon building my open air porch on my house soon ne ohio. I installed collar ties to leave an open space above the finished room along with r 15 insullation and installed a fan on a thermostat at the end of the roof in addition to ridge vent to suck all the hot air that collected between the roof and porch ceiling. Proper roof ventilation is an important aspect of home construction. The joint where the top of the porch roof meets the wall needs to be flashed well and most of the vent details for that look to me like they might leak water under some conditions of rain and wind.

If your porch has developed ceiling stains or problems shedding snow and ice in the winter try providing additional venting for the roof system. Last year i replaced a flat porch roof with a 6 12 pitch. Knee vents that fit along the area where the roof joins the house can also provide good ventilation for porches according to the roofing. People have strong and differing opinions on whether roof venting affects shingle life.

It will be a simple 3 12 pitch roof tying into the house front with ceiling joists with pine 1 4 tg beaded boards for ceiling. Louvered vents provide good air flow for roof areas. 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. 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.