En636-1, 2 and 3 plywood requirements

When doing with the european customers ,take care of their actual requirements of En636-1, 2 and 3 for plywood .

If you can understand fully meaning and requirements ,it will reduce your selling risks .

If you can not understand ,ask the customers provide you to see if you can meet .

Do not have any psychological fluke, to truly and truly treat the quality requirements of customers.Otherwise, it will be a big claim for quality

EN 636 Plywood – Specifications
The standard specifies the requirements for plywood for both general purpose use (non structuralapplication)
and structural application in dry (1), humid (2) or exterior (3) conditions. It also gives a
classification system based on the bending properties (tables).
According to the standard:
1. Plywood for use in dry conditions (EN 636-1)
Plywood to be used in dry conditions characterised by a moisture content in the material
corresponding to a temperature of 20°C and a relative humidity of the surrounding air only
exceeding 65% for a few weeks per year. These conditions correspond with service class 1.
according to EN 1995-1-1.
Requirements for plywood for use in dry conditions:
 Bonding quality – shall comply with the requirements of bonding class 1 of EN 314-2
 Biological durability – plywood shall be appropriate for prevailing climatic conditions
characteristic for class 1.of hazard of biological attack of EN 335-3

2. Plywood for use in humid conditions (EN 636-2)
Plywood to be used in dry conditions characterised by a moisture content in the material
corresponding to a temperature of 20°C and a relative humidity of the surrounding air only
exceeding 85% for a few weeks per year. These conditions correspond with service class 2.
according to EN 1995-1-1.
NOTE! This plywood is appropriate for protected external applications (e.g. behind cladding or
under roof coverings), but is also capable of resisting weather exposure for short periods (e.g.
when exposed during the construction). It is also suitable for interior situations where the service
moisture condition is raised above humidity of dry conditions.
Requirements for plywood for use in dry conditions:
 Bonding quality – shall comply with the requirements of bonding class 2 of EN 314-2
 Biological durability – plywood shall be appropriate for prevailing climatic conditions
characteristic for class 2.of hazard of biological attack of EN 335-3

3. Plywood for use in exterior conditions (EN 636-3)
Plywood to be used in climatic conditions leading to higher moisture contents than in service
class 2. These conditions correspond with service class 3 according to EN 1995-1-1.
NOTE! Plywood is capable of withstanding exposure to weathering conditions and liquid water, or
water vapour in a damp but ventilated location. In that class biological durability could be bring
down by making appropriate protection or/and if the plywood will be properly coated by chemical
agents on surface and edges, and if plywood is properly used and maintain.
Requirements for plywood for use in exterior conditions:
 Bonding quality – shall comply with the requirements of bonding class 3 of EN 314-2
 Biological durability – plywood shall be appropriate for prevailing climatic conditions
characteristic for class 3.of hazard of biological attack of EN 335-3

 

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