Residential Roof Ventilation Requirements

2018 international residential code.

Residential roof ventilation requirements.

Ventilation 2010 edition incorporating 2010 and 2013 amendments ref. Attic venting serves an important purpose and is key to a well performing roof system. Chapter 8 roof ceiling construction. Selecting metal roof and wall panels is a strategic investment for the life of a building.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. The following is a list of options for installing ventilation into a residential attic space. The amount of space you devote to intake must be equal to the amount you allow for exhaust and these must be calculated according to the size of your attic and slope of your roof. A ridge vent is a ventilation strip that is placed along the ridgeline of the home.

The roofing industry also has practical guide lines for attic ventilation. Typically building codes include minimum requirements applicable to attic ventilation. As an example of what you can find in chapter 8 of the 2018 irc see. See the benefits of attic ventilation a new roof is more than just shingles.

Isbn 978 1 85946 679 7 pdf 683kb this file may not be suitable for users of assistive technology. Enter square footage calculate or enter the square footage of the attic or area to be vented. Optimal air movement not only promotes temperature regulation and energy efficiency but also reduces the risk of moisture related issues like condensation build up. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.

Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the. To protect their investment it is key that your customers ensure the proper ventilation system is installed. On the upcodes website. Code requirements the international building code.

Contains sections covering roof framing roof sheathing and roof ventilation. Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems. Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof. The key to proper ventilation of your roof and attic is balance.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.