Infiltration rating of ICF
I am working on a design using ICF for a new building. I am wanting to run some performance testing on the wall assembly, however I am not exactly sure what to put for the infiltration numbers. Knowing PH is .6, I have been using 1.5 for tight framed construction (hoping and assuming it can test lower), but what is a good number to use for ICF construction from footing to roof? All the rave is about the tightness, so is 1.5 safe or too high? I am also using the r value for the EPS for my number and not any “thermal mass” fluff as they like to claim.