Air Tight Modular Home Construction
The air tight layer (ATL) is one of the most important components of Passive House building and is probably the most difficult to achieve. Air leakage through a building assembly not only results in energy loss, but more importantly it can compromise the durability of a structure by trapping waters vapors in any assembly. Mitigating air leakage is the most cost effective measure of reducing energy loss and is the “secret sauce” of any Passive House building. Passive House Certification requires buildings to achieve air leakage no greater than .6 ACH at 50 pascals of pressure!