Attic Roof Construction Details

Use construction nails 6 in 15 cm apart to secure the plywood around the outer perimeter and along each support.

Attic roof construction details. The valley is formed where the two different sections of the roof meet generally at a 90 angle. Construction of a rafter roof a simple rafter roof consists of rafters that the rafter foot rest on horizontal wall plates on top of each wall. Many regulations of the building code which are com. This type of roof is more complicated than the figure 2 1 most common types of pitched roofs.

Use 1 2 in 1 3 cm plywood to cover the entire surface of your roof. The unvented attic space is completely within the building thermal envelope. And the line length measurement from the roof peak to the building wall is the hypotenuse. The top ends of the rafters often meet at a ridge beam but may butt directly to another rafter to form a pair of rafters called a couple.

The rise or height of the roof at its peak is the altitude of the triangle. Unvented attics and unvented enclosed roof framing assemblies created by ceilings that are applied directly to the underside of the roof framing members and structural roof sheathing applied directly to the top of the roof framing members rafters shall be permitted where all the following conditions are met. The run or half the building span is the base of the triangle. Another option is the balcony.

Intersecting the intersecting roof consists of a gable and valley or hip and valley. Refer to specific language of this section for required dimensions of the access. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. These attic or roof ventilation recommendations are based on a survey of building science literature combined with 40 years of building inspections on the observation of the locations of moisture mold ice dams condensation stains and other clues in buildings and on the correlation of these clues with the roof venting conditions at those.

Put roof sheathing on top of your roof. Is that it is more difficult to construct than a gable roof. One and two family residential building code requirements 5 preface the purpose of this guide is to provide an informa tional guide to the builder for the construction of a new one or two family residential building garage or other accessory buildings and structures. Section r807 1 attic access.

An attic access is required where the ceiling or roof construction is combustible and where the attic area is more than 30 sf and the height between the ceiling framing and roof framing is more than 30.