18mm OSB 3 Tongue & Groove Flooring Board 2400mm x 590mm (8' x 2')

Colour and finish are representative only and may vary slightly as this is a natural product.

What Is 18mm OSB3 Tongue and Groove? 

Engineered for demanding environments, 18mm OSB3 Tongue and Groove (T&G) offers exceptional durability and performance compared to traditional interior laminate sheets.

Crafted to excel in humid conditions, this versatile wood sheet material, also known as sterling board, is composed of oriented strands compressed with adhesives, resulting in superior load-bearing capabilities.

OSB T&G 18mm exhibits performance characteristics similar to those of softwood plywood building materials, including comparable flexibility and strength. 

A notable attribute of OSB T&G 18mm is its durable tongue and groove profile. Precision-engineered edges allow the boards to interlock seamlessly, ensuring a perfect alignment with adjacent panels. This design feature renders 18mm OSB T&G particularly suitable for use in platform floors, load-bearing roofs, flooring, wall applications, and ceilings.

Furthermore, the inherent water resistance of 18mm OSB T&G makes it an excellent choice for use in areas prone to humidity.

Where Is 18mm OSB3 Tongue and Groove Flooring Board Used? 

• Wall sheathing
• Roofing and flooring applications
• Signboards
• Furniture and concealment applications

18mm OSB3 Tongue and Groove Flooring Board Benefits

• Relatively easily sealed against the elements - suitable for interior or exterior structural applications
• Precision engineered tongued and grooved board
• Edges machined to the finest tolerance for a snug and secure fit
• A reliable structural panel for house building and structural roofing
• Suitable for humid conditions - (Service Class 1 & 2)
• Superb load-bearing properties
• Durable building board
• BBA approved
• Standard finished thickness of 18mm
• Cost-effective alternative to plywood

OSB T&G 18mm - Tongue & Groove Explained

OSB T&G 18mm boards comprise a ‘tongue’ edge with a precisely engineered gap ‘groove’. 

When installing the boards, this tongue edge slots perfectly into the groove, streamlining the installation process. 

For additional security, the boards can also be glued or bound with screws or nails ( a method often referred to as ‘secret nailing’).

18mm OSB3 Tongue and Groove - Moisture Resistance 

OSB3 (Oriented Strand Board) showcases exceptional resistance to moisture and humidity, owing to its manufacturing process incorporating resin binders and wax.

Strips and flakes of wood are layered with an adhesive resin and then hot-pressed into a panel. This strength lends itself to OSB3's performative superiority over its sister board OSB2. 

While Class 2 OSB can only be used for non-load-bearing applications in dry conditions, 18mm OSB3 can be used for structural, load-bearing uses in humid conditions in housing applications. The boards are edge-coated with a proprietary water-resistant sealer to lessen the chances of edge swelling.

Despite this being the case, it is always a good idea to add further weather protection if you are planning to use it for permanent outdoor use.

You can do this by adding weather-proof exterior paint. Follow the exterior paint with a wood waterproofing sealant. Allow 12-14 hours for it to dry before installing it - you can add a second coat if required.