Lstiburek 20% Unvented Ratio for a Vented Roof?
I made a inquiry with a company that makes batt insulation looking for a list of dealers. This progressed into an application/installation discussion.
In the latest email the company sent me a copy of a publication (named below) saying the 20% foam/batt ratio needs to be used for vented Cathedral Ceilings.
Insight Hybrid Attics and Hybrid Walls Simple physics…complicated language By Joseph W. Lstiburek, Ph.D., P.Eng., Fellow ASHRAE
GBA Detail Library
A collection of one thousand construction details organized by climate and house part