EPS or XPS for Exterior Wall Insulation
I will be building a new house near Tucson. Lately, I’ve noticed some houses under construction using a synthetic WRB and Formular 250 instead of EPS and 15# felt. A typical exterior wall here in the southwest consists of 2×6, OSB sheathing, 15# felt, 1″ EPS foam board insulation, and one coat stucco system. Would the substitution of XPS and synthetic WRB for EPS and felt be worth the additional cost?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part