Attic Roof Construction Details

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.

Attic roof construction details. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Intersecting the intersecting roof consists of a gable and valley or hip and valley. Use 1 2 in 1 3 cm plywood to cover the entire surface of your roof. Refer to specific language of this section for required dimensions of the access.

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. Is that it is more difficult to construct than a gable roof. 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. 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.

A bank of roof lights say two up top and two more set below can transform a dark space into a light filled eyrie but such additional glazing will add to your bill. Section r807 1 attic access. The valley is formed where the two different sections of the roof meet generally at a 90 angle. Place a piece of the plywood on the bottom corner of your roof making sure the edges are on a rafter beam.

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. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Put roof sheathing on top of your roof. And the line length measurement from the roof peak to the building wall is the hypotenuse.

The rise or height of the roof at its peak is the altitude of the triangle. 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. The unvented attic space is completely within the building thermal envelope. Another option is the balcony.

Many regulations of the building code which are com.