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What is plywood?
Plywood is a flat panel made up of
sheets of veneer called "plys". They are glued
together with an adhesive that that is as strong
if not stronger than the original wood! Plywood
is valued because it is light, yet strong. It is a sheet
material, and can cover large areas. It can be nailed,
glued and sawed just like lumber.
Plywood is constructed with an odd number of layers with the
grain of each layer perpendicular to layers above and below. Outer layers and
all odd numbered layers usually have the grain direction going parallel to the
long (8-foot) dimension of the panel. This arrangement makes plywood especially
resistant to strain, splitting and warping.
Looks count! These specialty products are used where
appearance is most important. Face veneer is high quality hardwood used for wall
paneling and furniture.
matters! This plywood is used in building construction for sheathing on walls
and roofs, and floor underlayment, so is often not visible after the building
is done. Most structural plywood is made from softwoods, and uses thick, low-grade
veneers. But other structural uses like siding and concrete forms may require
a face veneer.