Plywood is a product made up of numerous thin strips of wood, known as veneers. Each veneer sheet is laid on top of each other with the grain of each alternating sheet running in opposition direction and bonded with glue into a plywood sheet. This method of construction creates a very strong and versatile man-made timber material which is less susceptible to expansion and shrinkage.
The majority of plywood is made from an odd number of layers, called plies (typically 3, 5 or 7), with an equal number of plies on each side of the centre ply.
One side of the plywood sheet is known as the “face” which is normally the side which would be seen in most applications and is generally the superior side. The other side is known as the “back” and is generally not as appealing and maybe rough. You can purchase plywood that has two goods sides for those applications where both sides of the sheet will be visible.
A plywood sheet is constructed with each veneer running in the opposite direction.