Important - Panels are cut to the exact measurements provided and fractions i.e. 1/4 ,1/2 etc are rounded up to the next whole number.

Please remember to add the necessary inches to ensure the panels overlay the openings as shown in the How to Measure document and How to Measure video (below) for wood and concrete construction.
Simple rule of thumb measuring - for concrete construction the panels will overlap the openings by 4" all around and for wood construction 2".