Photo 5 (top): Window Openings. Openings were lined with 0.5 in. (12.5 mm) thick plywood boxes that extended outward 4 in. (100 mm) past the exterior face of the stud wall framing such that their exterior edge lined up Ḁush with the exterior surface of the exterior rigid foam insulating sheathing. Photo 6 (center): Window Attachment. Typical Ḁanged residential windows are installed with the Ḁanges overlapping the exterior surface of the rigid foam insulating sheathing. Attachment is with mounting straps typically used with masonry openings. Photo 7 (bottom): Exterior Window Trim. Exterior trim is attached over the top of the exterior 1×4 wood furring. Standard water management (pan Ḁashing and Ḁashing tape) fo r rigid foam sheathing is used. Figure 1 (right): Superinsulated and Ultratight. The high levels of insulation are selfexplanatory. The air barrier is a combination of fully adhered membranes (the roof), spray foam (the “critical seals”) at rim joists and at the r oof to exterior wall connection, the exterior sheathing tape joints, interior glued gypsum boar d (the “ airtight dryw all approach”) and the foundation concr ete slab and perimeter basement foam insulation. December 2008 ASHRAE Journal 63