Constructions Standards Checklists

HOUSEWRAP – WINDOWS

DRAINAGE PLANE  A. Housewrap is cut at rough opening, folded in at jambs, and fastened to the interior face of the rough opening.  B. A butyl tape sill pan with flexible flashing in the corners, or alternate sill pan detail installed with sealant applied to the back of the window frame. Sealant should create an end dam, extending 6" up each jamb.  C. Continuous 3/8" bead of high-quality sealant applied to the head and jambs behind the window nailing fn, in line with any pre-punched holes, at time of installation. Non-continuous bead of sealant behind flange at window sill.  D. Window fastened per manufacturer installation instructions and is damage free.  E. Butyl flashing tape installed at each jamb

extending minimum 1" above the window head flange and below bottom edge of sill flashing.  F. Butyl flashing tape installed at the head layered over and extended 2" past the flashing tape at the jambs.  G. Header flap laps over head flashing and taped at diagonal corners and at minimum skip-taped along horizontal.  H. For mulled windows and windows without continuous integrated drip, drip cap installed with positive slope away from the house, integrated behind or taped to the WRB and turned up or down at the ends.

CONSTRUCTION STANDARDS CHECKLISTS | Drainage Plane | 25