Roof Venting 101

In summer the sun heats air in the attic.

Roof venting 101.

Attic ventilation 101 november 1 2019 many may not realize that residential attic ventilation was a requirement in the very first edition of the building officials conference of america s boca s model building code published in 1948. Ridge and soffit vents. Although there are many different types of roof vents to choose from ensuring you have the right number of both intake and exhaust vents is a central part of roof design. Ridge vents are installed along the roof line and soffit vents are installed under the eaves.

Advantages of proper roofing ventilation. And of course attic ventilation is still addressed in model building codes today. If a fixture is close to the stack and on the top floor the upper part of the stack serves nicely as a vent. Here are five rules that are critical to the success of this simple roof design.

This type of ventilation is basically a ridge vent with a built in electrical fan that can speed. Proper attic area ventilation is an important performance consideration for a home or building with a steep slope roof. In either season good venting occurs when cool air can enter the attic near the eaves and exit near the peak. The true vent a re vent pipe the common vent and the loop vent.

In winter heat from your home warms attic air. And since hot air rises and is exactly what you want to vent out of your attic exhaust vents should always be installed at or near the top of the roof. Roof venting 101 vent the attic space to ensure that a vented attic performs at its best you need to get the details right. The goal of roof ventilation is to get fresh relatively cool air into the attic and vent out hot moist air.

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 living space to the attic. Many fixtures are not so conveniently located however and other solutions must be found. These rules must guide design and construction no matter where the roof is being built. The installation of roof vents is a crucial part of roof design because it allows for proper attic ventilation which may help prevent condensation and early aging of your roofing materials.

Entire attic or if you re venting only the roof deck. A true vent is a vertical pipe attached to a drain line that travels through the roof with no water running through it. Vent the attic space learn how proper attic area ventilation is an important performance consideration for a home or building with a steep slope roof.