Preparation for a SIP order should include the following:
Pre-measure openings. Measure all doors, windows, vents and skylights in the safe room, then pre-cut plastic sheeting to fit with an overlap of 6 inches all the way around.
Pre-measure openings. Measure all doors, windows, vents and skylights in the safe room, then pre-cut plastic sheeting to fit with an overlap of 6 inches all the way around.