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").
Published twice a year, providing inspiration from a range of international projects using Fibre Cement roofing and EQUITONE facade materials, A+D Magazine is specifically designed for architects and specifiers.
Completed in 2011 in Cape Town, South Africa. Images by Wieland Gleich, Luis Mira Architects & Plus Arquitectura. The Junior School building corresponds to the Phase 1 of the Blouberg International School in Cape Town. The site is located into a residential area...
TODO: Check into moving vapor/ i&wb onto OSB layer and adding rainscreen above roxul. This would leave roxul & plywood room to breathe into cavity & would be easier to re-roof later by leaving the i&wb more protected further down.