Flat Porch Roof Ventilation

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.

Flat porch roof ventilation.

It depends on where the insulation is installed. Durable plastic and glass panels in your porch roof provide weather protection while also maximizing natural light. Consequently the article concludes that the concept of venting a flat roof is no longer safe and instead don 039 t vent the flat roof and install a smart vapor retarder inboard. Porch roofs can also develop ice dam problems like the rest of the house s roof.

The article notes that the ventilation cannot overcome the significant humidity drive into the flat roof structure caused by small air leaks. Porch roof ventilation options. A cold roof or hot roof. 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.

Roof vents help make a home more energy efficient and allow humidity and hot air to escape the. Last year i replaced a flat porch roof with a 6 12 pitch. Soffit vents have much less risk of water entry. Problems with porch roofs can cause intrusion of water into the interior of the house.

How much ventilation does a flat roof need. The answer depends on the type of roof you have. If you have an enclosed porch ceiling have vents to clear the roof cavity of moisture. Though porches are more open to the air they may still have ventilation problems under the roof.

Any type of roof from tpo to epdm can be either hot or cold. If you plan to include a ceiling fan in your porch make sure you take that into consideration when deciding on the height of your ceiling. Porches are often attached to the house.