Would metal roofing (say Imperial Rib type profile) on decking and horizontal purlins work for venting a roof assembly with sealed fibrous insulation-filled rafter bays?
The main question is whether the air space provided by the metal ribs would provide adequate air flow. If not, how about vertical 2X 'purlins', forming site-built insulation baffles that would be insect screened at both ends?
Posted Thu, 08/07/2014 - 12:43
Other Questions in Green building techniques
Best practices ideas for retrofitting existing PWF built in muskeg and best practices for foundations for new builds in muskeg (i.e. very wet !) and a severe cold climate