A mark in the center of the window and one in the opening allows Manny to center the window from the outside.
A bead of low-temperature caulk applied around the opening will seal the window flange against the house.
Before nailing the top corners, Manny checks the diagonal measurements of the window in both directions to make sure it's perfectly square.
Nailing the top corners locks the unit in position. At that point the rest of the flange can be nailed off.
Before applying the flashing tape to the side jambs, Manny scribes a line about 1/2 inch from the corner of the nailing flange. Starting the tape along this line will help keep it straight as it is applied.
After aligning the edge of the flashing tape with the guideline, Manny carefully presses the tape into the corner of the nailing flange. The free edge of the tape then tucks behind the siding that had been lifted away from the wall slightly when the opening was being prepped.
The window manufacturer specifies that the side flashing tape extend 2 inches past the upper nailing flange of the window. Manny extends the tape past the flange almost 4 inches on both sides.
Before coming to the site to do the installation, Manny cut and preassembled the exterior molding for the window in the comfort of his shop. To join the PVC molding, he glued and screwed the corners.
To save time and money, the original siding was kept in place for the installation. To fit the exterior trim, Manny holds the molding in place and scribes a line along the ends of the siding boards.
Raw wood like the cut ends of clapboards is vulnerable to absorbing moisture which can cause paint to fail prematurely, (or worse can lead to rot. A coat of fast-drying primer seals the cut ends before trim goes on).
Manny applies a bead of caulk to the back side of the prefabricated window trim before setting it into place.
Small plugs made from the same material as the trim are pushed into the holes. When the plugs are hammered flush, the holes completely diappear.
Flashing tape seals the drip cap to the wall. The original tar-paper barrier will then flop down to cover the whole assembly.
Manny pre-drills lengths of new preprimed clapboards that will be secured with stainless steel nails.