Is plywood waterproof?

High Strength: Plywood has the structural strength of the wood it is made from. This is in addition to the properties obtained from its laminated design. The grains of each veneer are laid at 90 degree angles to each other. This makes the whole sheet resistant to splitting, especially when nailed at the edges. It also gives the whole sheet uniform strength for increased stability. Furthermore, plywood has a higher strength to weight ratio as compared to cut lumber. This makes it ideal for flooring, webbed beams, and shear walls.

High panel shear: Plywood is made with an odd number of layers, making it tough to bend. The angle at which the veneer grains are laid against each other may be varied from 90 degrees. Each veneer can be laid at a 45 or 30 degree angle to the next one, increasing the plywood’s strength in every direction. This cross lamination increases the panel shear of plywood, important in bracing panels and fabricated beams.

Flexibility: Unlike cut timber, plywood can be manufactured to fit every requirement. The thickness of each veneer can vary from a few millimeters to several inches. The number of veneers used also ranges from three to several, increasing the thickness of the sheet. The extra layers add more strength to the plywood. Thinner veneers are used to increase flexibility for use in ceilings and paneling.

Moisture resistance: The type of adhesive used to bind the veneers makes the plywood resistant to moisture and humidity. A layer of paint or varnish can also increase resistance to water damage. These types of veneers are suitable for exterior use such as cladding, sheds, and in marine construction. They are also suited for holding concrete while it sets. Moisture resistance is important in interior applications as well, including on floors. The cross lamination ensures the veneers do not warp, shrink, or expand when exposed to water and extreme temperature.

Chemical resistance: Plywood treated with preservative does not corrode when exposed to chemicals. This makes it suitable for chemical works and cooling towers.

Impact resistance: Plywood has high tensile strength, derived from the cross lamination of panels. This distributes force over a larger area, reducing tensile stress. Plywood is therefore able to withstand overloading by up to twice its designated load. This is critical during short-term seismic activity or high winds. It is also useful in flooring and concrete formwork.

Fire resistance: Plywood can be treated with a fire resistant chemical coating. More commonly, it is combined with non combustible materials such as plasterboard or fibrous cement. This makes it ideal for use in fire resistant structures.

Insulation: Plywood has high thermal and sound insulation. This makes it a useful insulating material for flooring, ceilings, roofing, and wall cladding. Insulation offered by plywood can greatly reduce heating and cooling costs.

Judge which kind of plywood you need according to your actual situation. We offer high quality and best price. All kinds of plywood are produced by changsong wood with high quality. You are welcome to order.