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Appen~ix: Prepare Rough Opening for Sheathed or Open-Stud Wall Sheathed all For radius r curve windows, see diagram AI. 1 Clean ugh opening and surrounding sheathing with a clean, ry cloth beginning at the top 2 If buil ing wrap has not been applied prior to window install ion, . Si jambs: cut two strips of IS" wide building wrap 12" longer than the rough opening side jambs . He der: cut one strip of IS" wide building wrap 24" Ion er than the rough opening header . Ap ly side jamb pieces as follows (fig. AI): . ut side jamb pieces as shown in fig. Al . taple one side jamb piece to the face of the rough peningjamb wrapping out onto the exterior face fthe sheathing as shown in fig. AI; the wrap hould extend 6" past the head and 6" past the sill . taple flat to the exterior face of the rough opening . epeat on other side jamb . Ap Iy header as follows: . Cut header piece as !shown in fig. A2. . Staple header piece to the exterior sheathing above the head jamb extending 12" past bothjamb comers (fig. A2) . Wrap onto the inside face of the rough opening head jamb; staple flat If bui ding wrap was appli d prior to window instal ation, . ut the wrap over the rough opening in a modified "Y" shape, as shown in fig. A3 . rap head and side pieces onto the inside face of the rough opening and staple . rim the excess building wrap beyond the interior side of the rough opening 3 Place sill pan in rough opening with the open side facing the exterior; if necessary, stapl sill pan through the exterior, vertical face only; do not staple through bottom ofp Note: Window sits inside sill pan; the back dam of the sill pan s ould just clear the back edge of the window frame sill when it is placed in the rough opening. 4 Coat e sill pan with adhesive spray extending 3" up the side jamb on both sides; refer to fig. A4 (follow manufacturer's ins ctions for tack time) 5 Appl self-adhesive flashing to lower comers of window as folio s (fig. A5): . ut two pieces (one for each comer of the sill) 6" x all thickness + 3" emove backing paper from one piece Diagram A1. Radius or Curved Window Preparation ~tientaround curved perimeter to allow for njogin same manner as for standard window n sarl1lunanneras for regular window but apply Pias,follows: ICIlhg)wrap has been applied, cut as shown in fig. d;~.tathejns.ide II1Q,'VHlIP:has,not.been applied, cut three 18" .. .' .... ... p$ofbuilding.wrap and apply in a shiplap manner atI';shollllnlnfig.B;: cutllush with rough opening Fig. AI. Apply side jamb pieces Fig. A2. Apply header piece -g - Fig. A3. Cut building wrap Fig. A4. Apply adhesive spray to rough opening mOl2 Ins lation Instructions for Primed Wood Windows without Applied Exterior Trim Fig. AS. Apply self-adhesive flashing to lower comers Page 9