- 1). Measure the shape and dimension for the space in which you are hanging the OSB board. Most OSB sheets will measure 8- by 4-feet, so you will have to cut out pieces and special sections to go around window and door openings instead of covering those spots. For sub-flooring, you will have to cut around opening for pipes. You will also need to make cuts to cover areas too small for an entire sheet of OSB.
- 2). Use the measurements you need to draw shapes and sizes for cutting out the OSB pieces. Use a carpenter's square to make 90-degree corner cuts. Draw all cutting lines as dark, easy-to-see pencil marks.
- 3). Wear safety goggles while you cut out the OSB sheets with a miter saw. Because the larger OSB sheets are awkward to move, have an assistant help you move the sheets while you cut.
- 4). Move the cut sheets to their intended installation sites. To attach as sub-flooring, set the pieces into place over the floor joists; for wall or roof pieces, have your assistant or several assistants help hold the piece in place while you attach or hang the piece.
- 5). Align the ends of the OSB board with the wall studs or roof and floor joists, so that the ends of the OSB sit in the middle of each stud or joist. Fasten the pieces into place using a nail gun. Drive the nails through the OSB and into the studs or joists at each end of the board and throughout the center of the board; you may need a stud finder to locate all studs and joists in order to nail appropriately.
- 6). Butt the next appropriately cut piece of OSB board against the first hung piece and nail it into place. Continue placing adjacent boards until you have covered all places in which you need to hang the OSB sheets.
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