Roof Ventilation Requirements Building Regulations

Roofs with a pitch of 15 or more pitched roof spaces should have ventilation openings at eaves level to promote cross ventilation.

Roof ventilation requirements building regulations. Building regulation in england for the ventilation requirements to maintain indoor air quality. Otherwise ventilation is required and this is known as a cold roof system. In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. Published 1 december 2010 from.

Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems. When ventilating a roof the air should be able to enter at one end and travel through to the other end where it can exit. Make sure your comply with flat roof building regulations. The requirements will be met by the ventilation of those roofs where the moisture from the building can pass through the insulation.

Code requirements the international building code. Ventilation openings shall have a least dimension of 1 16 inch 1 6 mm minimum and 1 4 inch 6 4 mm maximum. Typically building codes include minimum requirements applicable to attic ventilation. Swish ventilators for roof voids are covered by british board of agrément certificate no 91 2620.

The roofing industry also has practical guide lines for attic ventilation. When used in accordance with the certificate swish ventilators will satisfy the following statutory requirements. 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. Enter square footage calculate or enter the square footage of the attic or area to be vented.

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. 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. Of vent for every 300 sq. Sometimes the excitement of starting a new construction project or building venture can lead you to forget about the finer details such as planning permission and local building regulations.

Building codes vary. The building regulations 2000 as amended england and wales.