Versatex Blog

How to Install Stealth Window Surrounds

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• Before installing your Stealth Window Trim, be sure the window area is properly prepared to accept it. The window should be installed square, true and plumb with the area where the window is to be installed and covered with house wrap. Flash the window opening in accordance with AAMA Method A-1. Apply a large bead of sealant around the window's rough opening. Insert the window into the opening pressing the flanges into the bead of sealant.
• Once in place, cover the entire nail flange of the window with a rubberized butyl flashing (i.e. Grace Vycor or equal). The flashing should extend 4” to 6” from the frame of the window. Apply the flashing to the bottom of the window first, then to the jambs and, finally, across the head of the window overlapping the flashing at the four corners. At the window header, have the flashing fold over and onto the top of the window. This will keep stray rainwater from getting behind the window.
• Typical window nailing flanges are approximately 1/8” thick creating an irregular surface for the casing boards or window trim making the 1/8” x 3/16” nail flange reveal ideal for this condition.
• Having measured the window, miter cut the Stealth Window Trim to create a picture frame look with the trim pieces. Glue using a cement or Fill n’ Fasten and pocket screw the miters to create the window surround. We recommend using a Historic Sill trim at the base of the window surround. Before installing the Stealth Window Surround, run a bead of sealant down the back edge just outside the pocket. The purpose of this sealant bead is to provide a positive seal of the trim to the wall of the house, as well as a dam which will prevent water or wind driven moisture from working its way behind the trim.
• Nail the Stealth Window Surround the same way you would standard trim, being sure not to nail through the overhang that conceals your siding. Although this overhang piece is 1/4” thick, it may break if struck with a hammer. Use stainless steel fasteners designed for wood trim and siding. Fasteners with thin shanks, blunt points, and full round heads are preferred. The fastener must be long enough to penetrate the substrate a minimum of 1 1/2”.
• Place nails a maximum of 16” on center. 
• At the window header, bend a piece of light gage aluminum into a “J” or drip edge and place it on the trim before installing the siding.
• Install the siding around the perimeter of the window in accordance with the manufacturer’s installation guidelines.