Roof construction detail

I have a (very sligthly sloped) flat roof deck held up by 2x8's to which the ceiling for the upstairs room is attached. Therefore, the space between the ceiling and the roof deck is about 7 inches - much like a cathedral ceiling, except that it's basically flat. In each 16" wide channel there is a pitiful layer of R13 fiberglass batt attached to vapor barrier paper laid against the ceiling, with cold air blowing continuously over and arround it from openings at either end ("vents").

Drawing of wooden roof detail AutoCAD file which includes a section of the roof.

How to ensure continuity between an interior air barrier membrane and wall sheathing that acts as an exterior air barrier.

Diagram of roof construction. Format Diagram Credit Image courtesy of MIT OpenCourseWare. MIT OpenCourseWare Course of Origin 4.401 Introduction to Building Technology Spring 2006 MIT Course Instructor Andersen, Marilyne MIT Department Architecture License http://ocw.mit.edu/terms Publisher MIT OpenCourseWare

Eaves and roof constructive structure cad drawing details that includes a detailed view of previously linked support, multilayer insulation panel, rubber shock absorber element, galvanized profile for anchorage, acoustic sandwich. (see detail), dimensions details, memory of materials, concrete details, cuts and joints details, reinforcement details, water proofing details and much more of roof structure details.

Roof drains are designed to carry water away from the roof and exterior of buildings. Roof drains come in a variety of sizes and shapes and can vary as to

The roof truss is defined as a load-bearing structural frame designed to bridge an internal space and support the roofing.

W hen making changes to a dwelling or when constructing a new dwelling it must comply with the current building regulations, when altering the insulation in a dormer part L of the building...