Windows & Doors

Windows cannot rest on the foam, so they hang from wood bucks

Use expensive stretch tape for the tricky parts and regular non-stretch tape for the rest of the window flashing

Wide tape spans the many layers of a thick wall to make an air tight and water tight seal

Window banks need to line up neatly for the trim to work out. Foam walls add the extra possibility of compressing the backing. So there's that.

Three videos covering the step by step process for flashing, installing, and airsealing an in-betweenie window in a Passive House Retrofit

The final step: center it in the opening, and seal the perimeter

Flashing an In-Betweenie window is a lot like flashing an Innie or an Outie, only it is somewhere in between

How to install pan flashing and jamb flashing on a window opening in a wall that will be thickened with 4 inches of foam—using regular, non-stretch peel-and-stick flashing tape.

From extension jambs to mullions, begin with the biggest piece and work to the smallest