Roof section 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").

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.

Truss Roof Section Drawing DWG File; download free DWG file wooden truss roof section drawing with dimension and description details.

Roof section structural block detail 2d view layout file in Autocad format, roofing material detail, dimension detail, namings text detail, welded and bolted joints and connection detail, principal rafter detail, struts detail, hidden line detail, different angle section are used, etc.

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

Client A: I like flat roofed designs very much but when I remember the cost of doing another slab up there I shrink. Be...