Specialized sizes or products such as beveled drop siding may also be produced. Reconstituted wood products may be smooth or textured to look like standard lumber. Depending upon the basic wood component used in their manufacture, reconstituted wood products may be classified as fiberboard or particleboard. Fiberboards are produced from mechanical pulps. Hardboard is a relatively heavy type of fiberboard and is used for exterior siding.
Many grades are available.
Particleboards are manufactured from whole wood in the form of flakes, shavings, chips or splinters. Waferboard and flakeboard are two types of particleboard made from relatively large flakes or shavings. Reconstituted wood products can be purchased unfinished, primed, with a top coat, or stained. Because of the many different types of fiberboard and particleboard products available, most retail lumber dealers do not carry a complete line but can order any special items. Only some fiberboards and particleboards are manufactured for exterior use.