| | An up-side-down martini-glass shape is traced within the window opening of the housewrap |
| | Housewrap is cut along the traced lines. |
| | Side and bottom flaps are wrapped iinside and secured. |
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| | Top cut is straight across. |
| | Sides of opening are protected by the housewrap, but sill corners are vulnerable. A flashing system is needed for corners and sills. |
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