Plywood is a highly versatile building material. The usage ranges from interior to structural to exterior. As a result, you can utilize it to do tasks like paneling and formwork. Here, we’ve attempted to outline and explain the reasons why Trojan plywood is a flexible material for both indoor and outdoor building projects.

What Are Plywood Sheets?

A plywood sheet is made of thin wood veneer layers that have been bonded together with the grain of the adjacent layers turned 90 degrees from one another. Plywood is made by combining wood veneers to form a flat sheet in its most basic form.

Plywood Sheets Manufacturing Process

Plywood is broken down into massive flat sheets before being utilized for building. If it is used to make furniture, boats, or airplanes, curves will be produced. The grain runs at a right angle through each layer of the ply. This lessens the chance of shrinkage while preserving the layer’s strength and longevity. Layers of wood veneers are glued together using adhesive to form plywood sheets.

The plywood’s back and face are its two outer regions. Typically, the face is visible while the back is hidden from view. When five or more plies are utilized, the additional inside layers are referred to as crossbands, and the central layer is known as the core.

Plywood Sheets Classification

Plywood is generally classified into two types, each with its grading system. The two categories are hardwood/decorative and construction/industrial. Plywood is used in the industrial and construction sectors because of its strength. Based on the veneer used on their back and face and their potential for exposure, they are categorized. Whether the exposure capability is internal or external depends typically on the adhesive type utilized.

The grades D, C, B, A, and N of veneer fall under this classification. The N rating is the best; the D grade contains the most flaws. Plywood used as subflooring often has a C or D grade.

The hardwood/decorative variety of plywood sheets is used because of their beautiful appearance. The grade in this class is based on how well the plywood resists moisture. Given that it is used for decorative purposes, the face of this plywood is rarely flawed, at least to the human eye. The technical classifications include Type III, Type II, and Type I.

What Materials Are Plywood Sheets Made Of?

Plywood can be made from both hardwoods and softwoods. It can also be made from a combination of the two. Although cedar, pine, redwood, and spruce are all used to create plywood, Douglas fir is the material of choice. Hardwoods like oak, eucalyptus, mahogany, teak, maple, or ash are frequently used to make plywood. Composite plywood’s core is made of solid wood or wood veneers.

To create a plywood sheet, several adhesives may be used to bond the layers of wood. The kind of plywood chosen depends on the use it will receive. For instance, phenol-formaldehyde resin, which is necessary for any outdoor task, would be needed for an outside building. It is recommended that you use plywood with PF resin, regardless of whether the intended application is for the interior or outside.

In addition to wood, various materials can be used to make plywood. For some applications, for instance, it may be necessary to glue a layer of metal, plastic, paper, or fabric to the plywood’s face, back, or occasionally both. The sheet’s resistance to moisture is subsequently increased.

To give plywood a more polished appearance that is useful for more ornamental activities, liquid stains may also be applied. Finally, a variety of chemicals may be used to treat plywood to improve particular properties. For instance, you can treat it as more resistant to fires or deterioration.

Unveiling the Diversity of Plywood Sheets: A Comprehensive Guide

1. Softwood Plywood

Softwood plywood is one of the most often used types of plywood. It is made from softwood species like cedar, fir, or pine. Softwood plywood has several applications, including construction, furniture, cabinets, and packaging. It is also known for being accessible and reasonably priced. It is commonly treated with preservatives for outdoor usage and rated based on the quality of the face veneer.

2. Hardwood Plywood

Hardwood plywood is made from hardwood species like oak, birch, or maple. It offers tremendous strength, stamina, and warp resistance. Hardwood plywood is widely utilized in expensive cabinetry, furniture, carpeting, and ornamental paneling because of its high regard for visual appeal. It is offered in a range of grades, enabling customization in accordance with project needs.

3. Marine Plywood

Marine plywood is designed specifically for usage in moist or humid environments, as its name suggests. It is constructed using waterproof adhesives and strong wood species. For tasks like building boats, docks, fittings for the bathroom and kitchen, and outdoor furniture, marine plywood works well. It is a solid solution for projects that may be exposed to moisture due to its exceptional strength and water resistance.

4. Exterior Plywood

Exterior plywood is designed for outdoor uses where toughness and moisture resistance are essential. Because water-resistant adhesives were used during construction, they can tolerate exposure to the elements. Subflooring, sheathing, roofing, and siding are frequent applications for exterior plywood. Because it is available in a variety of thicknesses and grades, it can be used for various structural requirements.

5. Interior Plywood

Interior plywood is designed for usage in regulated, dry environments. It is frequently made of softwood or hardwood and used to make furniture, shelves, cabinets, and wall paneling. There are various interior plywood grades available, offering diversity in appearance and functionality. Veneers are frequently used in combination with it to create a polished, elegant appearance.

6. Structural Plywood

Plywood designed specifically for load-bearing installations where stability and strength are required is known as structural plywood. Strong adhesives and premium veneers are used in its construction. Structural plywood is frequently used for roofing, flooring, formwork, and bracing in construction projects.  It is engineered to withstand heavy loads and maintain structural integrity over time.

Plywood TypeDescriptionCommon Uses
Softwood PlywoodManufactured from softwoods like pine, fir, or cedar.Construction, furniture, cabinets, packaging
Hardwood PlywoodMade from hardwoods like maple, oak, or birch.Cabinetry, furniture, paneling, ornamental use
Marine PlywoodIntended for damp or moist situations. constructed with sturdy wood species and waterproof adhesives.Boats, docks, bathroom/kitchen fittings, outdoor furniture
Exterior PlywoodUsing adhesives that are water-resistant, designed for outdoor use.Subflooring, sheathing, roofing, siding
Interior PlywoodDesigned for regulated, dry settings. made of hardwood or softwood.Furniture, shelves, cabinets, wall paneling
Structural PlywoodDesigned with stability, strength, and load-bearing applications in mind.Roofing, flooring, formwork, bracing
Flexible PlywoodMade with a flexible core that makes it easy to bend into different forms.Curved furniture, architectural elements
Fire-Rated PlywoodFire-resistant treatment makes it appropriate for applications where fire safety is essential.Fire-rated walls, doors, partitions
Decorative PlywoodDesigned with visually appealing veneers for decorative purposes.Interior decoration, furniture surfaces
Bending PlywoodEngineered to be more pliable and flexible, ideal for curved surfaces.Curved furniture, architectural elements
Aircraft PlywoodCrafted to meet aviation standards, used in aircraft construction.Aircraft interiors, lightweight structures
MDO and HDO PlywoodMedium Density Overlay (MDO) and High Density Overlay (HDO) have a resin-coated surface for enhanced durability.Concrete forms, outdoor signs, furniture

Plywood Sheets Size

The size of the plywood sheets might vary substantially. The most common thickness ranges between 6mm to 19mm. Every veneer’s back and face must be the same thickness as the top and bottom crossbands. The most common plywood sheet size is 8 inches in height x 4 inches in width.