Estimate full-length or split opaque-and-clear sheets for one rectangular plane.
Step 1
Measure across the sheet coverage direction, then measure the run in the direction each sheet travels.
For example: Garage north plane
Across the direction the sheets cover.
Along the sheet, excluding allowances below.
Enter only the overhang you intend beyond the measured roof edge.
Enter the additional top length required by your verified roof detail or overlap.
