From plank end to end, any distortion from flat.

A swirl or twist of the grain of the wood that usually occurs near a knot, but does not contain a knot.

The length of a plank is not true or square against a straight edge.

To change the properties of a substance by chemical reaction and thereby developing maximum strength. Generally accomplished by the action of heat or a catalyst, with or without pressure.

Cross-section of a tree branch or limb. Sound, tight knots less than 1/2" in diameter are typical for hardwood flooring. Pin knots are typically 1/4" or less in diameter.

A transition molding accessory for hardwood flooring, normally used at doorways, but sometimes at fireplaces and as a room divider. One edge is at the same height as the flooring and the other is tapered or feathered. 3' or 6' fixed length or random length is available.

The layer of wood growth formed on a tree during a single growing season.

Caused when wood plank absorb excess moisture and expand so much that the cells along the edges of adjoining pieces in the floor are crushed. This causes them to loose resiliency and creates cracks when the floor returns to its normal moisture content.

A “convex” or “crowned” condition or appearance of individual plank, with the center of the plank higher than the edges. (Plank is frowning across the width)

A “concave” or “dished” appearance of individual plank, with the edges raised above the center. (Plank is smiling across the width)

The decomposition of wood substance by fungi. The incipient stage is characterized by discoloration, and may be accompanied by a softening of the wood substance. The final or ultimate state is characterized by the partial or complete collapse of the wood structure and the destruction of the wood substance.

The separation of any of the veneer plys that make up the flooring.

The degree to which the flooring maintains its original dimensions when subjected to humidity changes.

All edges of the flooring plank are slightly beveled at 45 degree angles to the plank surface, resulting in a very shallow groove between pieces when they are placed next to each other. Micro-beveled edges are smaller than eased edges and eased edges are smaller than beveled edges.

In tongue-and-groove plank flooring, the individual pieces have a tongue milled on one end and a groove milled on the opposite end, so that when the individual planks are butted together, the tongue of one piece engages the groove of the next piece.

A broad generic term inclusive of sheet materials of widely varying densities manufactured of refined or partially refined wood or other vegetable fibers. Bonding agents and other materials may be added to increase strength, resistance to moisture, fire or decay, or to improve some other property. Fiberboard is not an approved substrate for Nydree flooring.

In woodworking, any substance used to fill the holes and irregularities in planed or sanded surfaces to decrease the porosity of the surface before applying finish coatings.

Generally, one of the botanical groups of deciduous trees that have broad leaves in contrast to the conifers or softwoods. The term has no reference to the actual hardness of the wood.

The wood that comes from the center of a tree. It is usually darker than the outside of the tree (sapwood).

Includes all defects or blemishes that are produced in manufacturing. Examples include chipped grain, delamination (ply separation), skips in finish, variation in machining, sander burn marks and mis-milling (plank do not fit together on sides or ends).

The amount of water (moisture) in wood expressed as a percentage of the weight of oven-dried wood.

A profiled molding used to cover the outside comer of a step, milled to meet the flooring in the horizontal plane and to meet the riser in the vertical plane. (Usually used on landings.)

A panel or core product composed of small particles of wood and wood fiber that are bonded together with synthetic resin adhesives in the presence of heat and pressure.

• Flakeboard - A particle panel product composed of wood flakes.

• Oriented Strand Board - A type of particle panel product composed of strand-type flakes which are purposefully aligned in directions which make a panel stronger, stiffer, and with improved dimensional properties in the alignment directions than a panel with random flake orientation.

• Waferboard - A particle panel product made of wafer-type flakes. Usually manufactured to possess equal properties in all directions parallel to the plane of the panel. Particleboard of any type is not an approved substrate for Nydree flooring.

Typically flooring that is 3" and wider designed to be installed in parallel rows.

A completely finished floor that requires installation only.

The wood near the outside of the tree. Usually lighter in color than heartwood.

General term used to describe lumber or veneer produced from needle and/or cone bearing trees (Conifers).

Milling around the edge of a flooring plank that allows each plank to join together. One side of a plank contains a tongue and the other a groove. The ends of each plank also contain a tongue or groove.

Veneer produced by centering the log in a lathe and turning it against a broad cutting knife which is set into the log at a slight angle.

Any distortion of a piece of flooring from its true flat plane.