Oregon Residential Specialty Roof Ventilation

Chapter 8 roof ceiling construction.

Oregon residential specialty roof ventilation.

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. Eight of the adopted specialty codes are available to read online. The remaining codes are comprised of multiple standards listed on the program pages. Four story structures regulated under the oregon residential specialty code irc 1 3 5 1 12.

Roof vents must have between 40 and 50 of the vents located within 3 of the peak to take advantage of ventilation area reductions. A cricket or saddle shall be installed on the ridge side of any chimney or penetration. International residential code 2015 irc 2015. Intake and exhaust vents shall be provided in accordance with section 1203 2 and the manufac turer s installation instructions.

1503 6 crickets and saddles. Or air movement and control association amca residential ventilation standards. The division works to ensure the adopted codes and standards are accessible. International residential code 2015 irc 2015.

Area to be exhausted. 330 2014 oregon structural specialty code 1503 5 roof ventilation. Section m2005 water heaters section r408 under floor space section r404 foundation and retaining walls section r806 roof ventilation. Table m1507 4 minimum required local exhaust rates for one and two family dwellings.

The division works with building officials technical committees advisory boards and the public to adopt amend and interpret the oregon residential specialty code orsc. This code applies to the construction reconstruction and repair of one and two family dwellings and townhouses. After january 1 2018 all work must conform to the new code. Although there are many different types of roof vents to choose from ensuring you have the right number of both.

2017 oregon residential specialty code orsc adopts with amendments. 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. Cargo containers used as accessory storage structures irc 1 2 1 29 13. See the benefits of attic ventilation a new roof is more than just shingles.

International residential code and oregon residential specialty code orsc chapter 1. Advantages of proper roofing ventilation. 2017 oregon residential specialty code orsc.