(a) General.
(1) All exterior stud framed walls which are not finished with back-plastered stucco extending back between the studs at least one-fourth (1/4) inch, or with other approved exterior finish which will provide adequate bracing and weather protection, shall have wall sheathing back of the exterior finish.
(2) Exterior wall sheathing shall consist of either wood boards, plywood, fibre board, gypsum board, or particle board, conforming to the requirements of OBBC or other material approved by the Ohio Board of Building Standards or the Cleveland Board of Building Standards and Building Appeals.
(3) All wall sheathing shall be fastened to each stud, to top and bottom plates and to sills.
(b) Wood Sheathing.
(1) Wood sheathing shall not be less than five-eighths (5/8) inch in net thickness.
(2) Joints shall be broken over studs unless end-matched boards are used. If end-matched boards are used, no two (2) adjoining boards shall break joints over the same stud space, and each board shall bear on not less than two (2) studs.
(3) When applied diagonally, boards shall extend at approximately forty-five (45) degrees in opposite directions from each corner.
(4) When applied horizontally, the stud frame shall have diagonal corner bracing.
(5) Wood sheathing shall be applied horizontally under stucco finish.
(c) Plywood Sheathing.
(1) Plywood for exterior sheathing shall be not less than “sheathing” grade, “interior type.”
(2) Shingles applied over plywood sheathing less than five-eighths (5/8) inch thick shall be fastened to wood or other approved nailing strips.
(d) Fibreboard Sheathing.
(1) Fibreboard sheathing shall not be less than the following:
Minimum Thickness (Inches) | Maximum Stud Spacing (Inches) |
1/2 | 16 |
3/4 | 24 |
(2) So far as possible, each fibre-board sheathing board shall bear on at least four (4) studs.
(3) Fibreboard sheathing shall be erected with tightly fitted vertical joints staggered.
(4) Fibreboard shall not be used as a nailing base for the attachment of exterior finish. Exterior finish shall be nailed either to the studding through the fiberboard, or shall be attached to wood or other approved nailing strips.
(e) Gypsum Board Sheathing.
(1) Gypsum sheathing boards shall have an approved water repellent treatment adequate to prevent moisture or water from entering into the gypsum core, shall have a minimum thickness of one-half (1/2) inch.
(2) Sheathing shall fit tightly around all door and window frames, with all ends over supports and with vertical joints staggered. At openings, water- resistant paper shall be applied to provide a seal between the opening frame and the gypsum sheathing.
(3) Wood or slate shingles applied over gypsum sheathing shall be fastened to wood or other approved nailing strips.
(f) Particle Board Sheathing.
(1) Particle board sheathing shall have a minimum thickness of three-eighths (3/8) inch.
(2) Sheathing shall fit tightly around all door and window frames, with all ends over supports and with vertical joints staggered. At openings, water- resistant paper shall be applied to provide a seal between the opening frame and the sheathing.
(3) Wood or slate shingles applied over sheathing shall be fastened to wood or other approved nailing strips.