Plywood is a manufactured wood panel made from thin sheets of luan wood veneer. It is one of the most widely used wood products.
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It is flexible, inexpensive, workable, and re-usable, and usually can be manufactured locally. Plywood is used instead of plain wood because of plywood's resistance to cracking, shrinkage, splitting, and twisting/warping, and because of its generally high strength.
Layers of Wood, which are called Vaneers,are glued together, with adjacent plies having their wood grain at right angles to each other, to form a composite material. This alternation of the grain is called cross-graining and has several important benefits: Plywood Vaneers reduce the tendency of wood to split when nailed at the edges, this is a benefit for many do it yourself jobs, especially when you consider that most do it yourself'ers are novices in jobs for the first time.
Another advantage of Plywood Vaneers is that they reduce expansion and shrinkage, providing improved dimensional stability; and it makes the strength of the panel consistent across both directions. There is usually an odd number of plies, so that the sheet is balanced—this reduces warping. Because plywood is bonded with grains running against one another and with an odd number of composite parts, it is very hard to bend it perpendicular to the grain direction.
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MDF Plywood : Description
What is MDF Plywood? Well I'll give you a brief description of it's background here. MDF Plywood is actually an acronym for Medium Density Fibreboard. It is a specially engineered product which is created when hardwood or softwood is broken down into fibers and then combined with wax in a resin. This then forms panels (plywood) by applying high temperature and pressure. MDF Plywood is actually denser than regular plywood, but can be used in the same applications or those that might call for greater strength than run of the mill plywood Read More
CDX Plywood : Description
CDX is a low or average grade exterior plywood material: The letters C and D represent the grade quality of the wood on both the front and back sides, and the X represents that it is an exterior grade wood suitable for outdoor purposes and resistant to water damage as the glues involved in making the plywood will not be adversely impacted my exposure to water. Read More