How to Cut OSB

Measure the area where the OSB will go and determine the size cuts that will need to be made on each sheet. Measure on the sheet with a tape measure and mark at the desired spot where the cut is to be made. Using a T-square and marker, draw a line across the board where the cut will be made. This will help ensure a perfectly straight cut.

Set up the table saw in an open environment where there is proper ventilation and space to work with the large sheets of OSB. Take the first sheet and line up the mark to the blade. Turn on the table saw and feed the board through. Make sure to go slow so the cut is made straight. Feed the board completely through and turn off the saw once the cut has been made. Repeat this procedure for each board that needs to be cut.

Sand the edges of the OSB with sandpaper, as the edges will be extremely rough. Sand down the entire side of the board where the cut was made until the edge has been completely smoothed out.

Paint the cut edge with a waterproof exterior sealant to prevent moisture from weakening the board. Allow the OSB at least four hours to dry before beginning installation.