Guide describing how to install flashing that is integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit.
https://basc.pnnl.gov/resources/2018-irc-international-residential-code-one-and-two-family-dwellingsGuide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.