FAQ Knowledge Articles

The technical thickness of Marvin Bow or Bay Assembly individual Head or Seat Boards is 0.640" +/- 0.025".  The Marvin Order Management System rounds this thickness to 11/16", however, or 0.6875".  The placement of Head and/or Seat Board varies by Bow or Bay Assembly product type, so please reference the Marvin Architectural Detail Manual (ADM) for more information and details.

Clad Ultimate Casement Bow & Bay ADM
Clad Ultimate Double Hung Bow & Bay ADM
Wood Ultimate Casement Bow & Bay ADM
Wood Ultimate Double Hung Bow & Bay ADM