Today we finally started on the window installation. This is an important step as we work to enclose the building. The Tyvek is cut and bent around the window openings as you can see below. Then the "protecto-wrap" product is used to seal the sill of the window. The window is placed inside the space and properly fitted with small wood strips. We then go outside and drill eight holes in the nailing fins of the window on the outside. We use a countersink drill bit to give it a groove so that the screw will sink in better with the wall. We use galvanized 1 1/2 inch screws to hold the window to the house from the outside. The protecto-wrap product is then once again put on the two edges of the window, sealing the aluminium frame to the Tyvek. Then another strip of the protecto wrap is used again on the top of the window. When you working with these products you need to imagine water running down the side of the wall of the house. What will it do? How will it flow when it reaches a point, etc. By following these methods any water which does get behind the cedar siding will run down the Tyvek, hit the protecto-wrap product on the top. Since it seals to the top of the window, the water will then run over and around the window. It also can't penetrate the sill of the window because thats also covered. Essentially the water will have no possible to get behind the Tyvek and into the house.
Tyvek cut in a upside martini shape and folded inwards.
Protecting the window sill is the first step to water proofing.
Cut and folded on the outside.
Window in place.
Inside view of window with wood spacers and protecto-wrap.
Galvanized screw already in place holding window to wall.
Complete protecto-wrap treatment given to window.
See how it overlaps? Water can't get behind the tyvek (and inside the house) anyway now.
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