Interior and Exterior Plywood – Difference, Grading and Handling


Different types of high-quality wood products have been developed by modern technology. The majority out of them are wooden “sheet” materials – purely flat sheets of compressed wood products that have strength, more flexibility, and less likely to break than ordinary lumber. These sheets expand and contract lesser than rough-cut lumber and are available in different sizes (usually 4 by 8-foot sheets) that would almost be impossible to mill and distribute in the natural form of wood.

All of these wood products can be categorized either as plywood or hardboard. Actually, plywood is a sandwich panel of real wood which is made from an odd number of highly thin sheets of wood set down with the grain running in flip-flop directions and bonded under extreme pressure, adhesives, and heat. There are various types of plywood for furniture in India available to the home craftsmen for excellent construction work.

Plywood serves a purpose both in interiors and exteriors – depending on the adhesive bond and grade of veneer. The inner flocks of exterior plywood are of really very high quality, and attached together with unfailingly waterproof glue. This kind of plywood has the capacity of resisting time and weather – even when it is boiled in water, it does not decontaminate at all. On the other hand, the plywood manufactured to serve interior purposes is water-resistant but not waterproof. Therefore, it is generally not included in the projects for permanent outdoor use.

The quality of face or front and back panels is what determines the grading of plywood. Letters including A, B, C and D are the indication of different grades. A indicates the best quality, B reflects smoothness (excellent for painting), C indicates splits and knotholes, and D is the poorest (often used for inner ply of interior plywood). Two letters are utilized in the determination of grading of a sheet of plywood – one for the front or face, and other for the back. The biggest task while working with plywood is usually the proper cutting of large panels to the desired size. If you try to cut several panels from a full-length sheet of plywood, then it would be good to draw the sections on paper first and then transfer the marks onto the plywood.

It is always necessary to have a double check on measurements just to be sure they are correct as per the requirements. If you make up your mind to cut the piece utilizing a handsaw, table saw or power radial, then place a mark on the face of the plywood and have cuts on it with this side up. In case, you are making use of a portable power saw, then mark and initiate cutting on the panel from the back side.

Most of the reputed plywood manufacturers in India offer all the above-mentioned types of plywood through their strong dealer network across the country.


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