Xsi model has exposed Dow stryrofoam, but is labeled as “no thermal barrier required”, but when I click on the http://www.superiorwalls.com/xi_detail webpage, DOW® extruded polystyrene insulation shows up.
My point is that it’s confusing and is the insulation required to be covered?
Just got off the phone with David from Superior Walls, the exposed extruded polystyrene insulation does not have to be sheetrocked/fireproofed which explains the words “thermal barrier not required”!
In the past our AHJ required it to be covered, even in the basement. I haven’t checked in a while but still point out the potential hazard of breathing black poison in the event of a fire in the basement.