Labels:sky OCR: Potential for air leakage vapor many times higher than permeat ion. 004 cfm/f+2 eff ective air barrier perf orm ance Again air leakage Is measured in cfm per square foot. An effective air barrier based or the standards that are being writ ten into eaees today has 004 fm per The potential for air leakage vapor is many times higher in most situations than permeation because air leakage primarily the result of necessary joints and holes and designed imper fections the wall where air can actually migrate That's why an air and moisture barrier becomes so impor tant Slide ATA Continuing Education tana Steel pr4s Moisture Resistance XPS codes Stae Stud Resistonos
