Is flashing required with EIFS?
Yes. As with all wall cladding, flashing is an important component required by building codes. At points where water can enter the wall it should be directed to the exterior face of the cladding with flashing. Transition areas such as decks or roof/wall intersections are typical areas where flashing must be installed. Openings for windows and similar through-wall penetrations require jamb, head, and sill flashing to direct water to the exterior face of the cladding. Note: Complete moisture protection requires rough opening protection and the integration of air seals, sealants, and flashings.