B. Cornice Width Adjustment.Size
Example: 74” window + 1” on each side = 76” cornice
You will need to cut one of the 16” extensions to get the 76” length. You will cut 14” from one 16” extension. To cut draw a line, using a ruler as a guide, from top to bottom on the back (flat side) of the cornice. A hacksaw, electric carving knife, or retractable utility knife extended about 4” may be used to cut the polystyrene forms. Use a slow up and down sawing motion rather than trying to slice the piece