Plywood Roof Sheathing Gap

H clips provide additional stiffness between bearing points for the unsupported edges of wood panel plywood or osb roof sheathing along with the necessary 1 8 gap for expansion as shown below illustrated on a bag of simpson h clips.
Plywood roof sheathing gap. Ventilate the roof according to current building codes step 3. The shaft of the nail is slightly larger than 1 8 inch. Align the long edge of the sheathing with the ends of the. Properly fasten panels including fastening and spacing hints step 4.
That can mean costly time consuming callbacks. Position the first piece of plywood or oriented strand board sheathing on the bottom edge of the rafter tails at one end of the roof. If the wood structural panels are tightly butted there is no room for expansion and buckling can occur. Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content.
Use a 16d sinker nail for this purpose. Cover sheathing with. Apa recommends a 1 8 inch space between panel edge and end joints. And scroll down to see more details on each with installation hints and tips below.
Not always required but a good idea. This gap will minimize or totally eliminate any puckering caused by swelling.