Carpentry Materials: Modified Woods

Modified woods are now a significant material for home carpenters. Plywood is made from thin plies or veneers glued together having the grains at right angles. In three-ply plywood there is a core having two "faces" of veneer. Five-ply panels have a core, two inner plies known as crossbands, and a veneer surface. Plywood offers equal strength in width and length of the panel and more outstanding resistance to splitting and moisture changes. Another distinguished advantage is the extra width that is available. Laminated wood and paper-faced plywood are made up of wood, or layers of wood and plastic, or

wood and paper bound together with resins tempered under pressure. These give interesting patterns and stain-resistant finishes valuable for sink tops and highly ornamental work.
Some of the resin-impregnated finishes look like fine veneers, inlays, and great designs in a variety of colors.

Plaster boards and wood-fiber boards are commonly used for ceilings, insulation, and interior walls. Some are pliable, and some semi-rigid.
Fiberboards are stiff panels created from waste materials— cork, paper, straw, sawdust, corn stalks, and the like. Produced like paper in a water suspension, it is available in all thickness ranging from 1/16 inch to 1/2 inch. Highly compressed, they're tough and rigid and could be made weather-resistant. Some plastics made of wood or wood products are utilized as substitutes for hardwood melded with synthetic resins. They are commonly used for tool handles, toys, machine parts and the like.

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