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Products> Building Products> OSB FAQs> Classification & Warranty

Classification & Warranty

Definition, Classification and Properties

What is OSB?

OSB is an engineered plane and rigid wood panel made of quality wood strands in controlled cross orientation, bound with a synthetic resin under high temperature and pressure conditions.

Depending on their technical class (type) and intended use, the boards can be used in dry or humid conditions.

How many types of OSB exist and what is the intended use for each?

According to EN 300, there are four types of OSB, known as technical classes:

  • OSB → general purpose non load-bearing boards for use in dry conditions (service class 1)

 

  • OSB 2 → load-bearing boards for use in dry conditions (service class 1)

 

  • OSB 3 → load-bearing boards for use in humid conditions (service classes 1 & 2)

 

  • OSB 4 → heavy-duty load-bearing boards for use in humid conditions (service classes 1 & 2)


Among these, OSB 3 is currently the most used product in Europe.

Standard OSB boards have un-sanded faces and sharp edges, but boards with smooth/sanded faces and milled edges (2 or 4-sided „tongue and groove“ - T&G profiles) are also possible to manufacture.

What are the main features of OSB?

OSB is a plane and sturdy board with remarkable mechanical properties and dimensional stability.
Its main function is for structural use (structural flooring, roof and wall sheathing), but also incorporates the function of a vapour barrier and of an airtight layer when used in the exterior components of wood frame houses.

Lifetime & Warranties

What is the lifetime of OSB boards?

If correctly stored, transported, handled, installed and maintained over the lifetime of the building, OSB boards will retain their mechanical properties for at least 50 years.

Does EGGER provide any warranty for its OSB boards?

EGGER fulfills all its duties as manufacturer according to the European Construction Product Regulation (CPR). The relevant documents are the Declarations of Performance for each CE-marked product.