Polycarbonate glazing is also called sheeting and is installed on the frame of a greenhouse to enclose it. It is made of a rigid, clear, plastic material and is an alternative to flexible plastic sheeting or glass. Since the polycarbonate sheets come in precut sizes, you must cut some of the sheets at the edges of the greenhouse. Cutting polycarbonate glazing is accomplished using a standard circular saw.
Place a tape measure up to the location of the greenhouse where you are installing the polycarbonate glazing and measure the proper length or width.
Lay the polycarbonate glazing sheet on a flat surface and mark the proper cut location with the tape measure and a marker.
Place the polycarbonate glazing between two saw horses with the cut line hanging off one end.
Insert a carbide tipped blade with 60 to 80 teeth per inch into a circular saw.
Put on safety glasses and pull the trigger of the circular saw to start the blade spinning. Move the blade slowly toward the polycarbonate and cut through it all the way to the other side of the marker line.
Release the saw trigger and wait until it stops spinning to set it down.