Waterproof plywood: specifications and reviews

In the construction market plywood is very popular.It is used in many spheres. This material is a few glued sheets of wood veneer, processed in a certain way. Synthetic resins are used to join the layers. Due to this, all kinds of plywood are somewhat protected from moisture. But there are some species that are better than others to prevent moisture. This is the waterproof plywood.

Production features

Wood-layered slabs, capable of withstanding long-term exposure to moisture, are designated by GOST as FSF.

Sheets of waterproof plywood are manufactured fromusing specially selected substances. These substances and protect the material from moisture. Apply drying oil for wood impregnation, paint and varnish. In some types of coating shpaklyuyut compositions using PVA, use fiberglass.

At the stage of forming the plates, the degreemoisture resistance. This is done by adjusting the composition of synthetic resins used to glue the layers. Therefore, knowing the substance that was used as an adhesive, you can determine the degree of moisture of the material:

• Plates made with the use of carbamide substances have a moisture resistance limit in the region of 5-10%. Such materials are able to withstand only a brief exposure to moisture.
• 10-15% of the resistance to moisture provides the use of phenol-formaldehyde compounds. Plates of this type can be used for outdoor work.
• Plywood waterproof laminate is not subjected to destruction under the influence of moisture. It is protected by a film applied to the surface of the plate.

Advantages of the material and its disadvantages

The way of production makes the plywood strong andresistant to deformations. This is achieved due to the presence of several layers and special adhesive compositions. Therefore, the following advantages of such boards can be distinguished:

• Resistance to moisture. Waterproof plywood is not subject to destruction under the influence of moisture. It does not stick to layers and does not deform.
• Easy to use. High strength of the material does not interfere with the processing process. Plywood can be easily processed with various tools. It is easy to mount.
• Combination with other building materials. Most often, waterproof plywood is used as an additional material. It is easily combined with natural and polymer building materials.
• Wear resistance. Plywood can withstand mechanical stress without breaking integrity.
• Resistance to temperature changes.
• Wide scope of use.
• Aesthetics. Plywood externally has an original wood pattern and color.
• Affordable price. Plywood plates are cheaper than solid wood. And you can always save by choosing a lower grade material.

The only drawback of the material ispresence of harmful substances in the composition of the glue. It's about formaldehyde. Therefore, it is not recommended to use plywood in living quarters and where there are children or people suffering from allergies.

Application area

Waterproof plywood is used in many industries. Most often it is used in construction. It is used in the following processes:

• Sheathing of walls, floors, roofs.
• Interior decoration of buildings.
• For the manufacture of decorative elements.
• As a formwork reusable.
• For billboards.
• For the production of packaging.

Due to its strength, reliability and low weight,waterproof plywood used in the construction of ships, rail transport, furniture for the garden. A separate view of the chopped birch is used even in aviation.

Types of plates

Given the degree of moisture resistance, plywood is made of several types:

• FC.It is a material that is made using carbomidoformaldehyde formulations. It has an average moisture resistance. But it has good ecological compatibility. Used for interior work, furniture production and decoration.
• FSF has increased protection against moisture.As an adhesive, phenol-formaldehyde resins are used. From a similar material make a rough floor, a lath of a roof, make container, advertising boards.
• FBS has the greatest protection against moisture and swelling. It is a bakelized waterproof plywood. They use it in shipbuilding and aircraft building.

In appearance, the water-resistant plywood is divided intofive varieties (from 1 to 5). If the slabs are made of hardwood, the letters E are added to the figures at the marking. In the case of coniferous raw materials, the letter X is used.

By surface treatment material quality distinguish unsanded (NS) with single-sided polishing (III-1) and a double-sided polishing (III-2).

There is also a classification according toamount of formaldehyde in the material. With a content of up to ten milligrams per hundred gram of material mass, they speak of the emission class of E-1. If the resin is contained from ten to thirty milligrams, then indicate the class E-2.

Dimensions of plates

The average dimensions of the material are 1.22 x 2.44, 1.25 x 2.50,1,52х3,05, 1,52х1,52 m. This is not all, but only the main dimensions for waterproof plywood. The thickness of the plates can be from 9 to 40 mm. It depends on the number of layers of wood. They can be from three to twenty-one.

• The plywood of FK brand is made in length of 1,525 m. Its width can be 1,22, 1,27 or 1,525 m.
• FSF has a width of 1.22 and 1.25 m. Its length is 2.44, 2.5 m.
• The dimensions of the PBS plywood vary in length from 1.5 to 7.7 m, in width from 1.2 to 1.55 m.

User Reviews

According to consumers, waterproof plywood is a quality material that is not afraid of moisture and atmospheric effects. They also note the high strength of the material.

In addition, the ease of installation and processing is noted. In the plates you can hammer nails, twist the screws, make holes in them and so on. And all this does not cause any difficulties.

Of the minuses, consumers note the complexity oftransportation of plywood. It is caused by large dimensions. The sizes of waterproof plywood are always more than one meter. Due to this plate not all types of equipment are placed. Therefore, to transport the material, you must search for suitable transport.