This detail illustrates a window sill condition in an adhered veneer wall with wood stud backing and glass mat reinforced exterior gypsum sheathing. This backing system represents a lower initial cost alternative to concrete masonry, giving up some of the durability, stiffness, low maintenance, and life cycle costs of CMU. Rough opening treatment around the window perimeter shingles over the building wrap, providing continuity of air and moisture control at the termination. Continuous insulation outside the sheathing offers excellent thermal control, enhanced by additional insulation in the stud cavity. A drainage mat collects moisture that may penetrate the veneer and diverts it out through the weep vents via sill flashing with end dams. The thin brick veneer and stone sill are adhered to cement board with properly treated seams, and a vertical expansion joint allows movement of the veneer.
01.090.0401 Window Sill | Adhered Brick Veneer, Wood Stud Backing