OSB panels for outdoor use

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OSB panels are not the ideal building material for outdoor use; from a structural point of view, you may only use the panels in very specific areas. Also note that there are different versions.

Classification of OSB panels

OSB panels are coarse chipboard made of long chips that are aligned in several layers. In the outer layer, the chips are always aligned parallel to the length or width of the panel, never diagonally. Different binders are used depending on the intended use, the panels are classified according to DIN EN.

  • Type 1 is generally suitable for dry areas and is not load-bearing. You should get out of this furniture build at House building you will hardly find any use for the plates.
  • Type 2 is also only suitable for dry areas, but is load bearing. You can use this building material to stiffen slatted structures, for example.
  • Type 3 is considered the standard panel. It is load-bearing and also approved for wet areas.
  • Type 4 is like type 3 but can withstand high loads, i.e. the plate is more stable.
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Type 3 and Type 4 can be used outdoors under certain conditions.

Use outdoors

No type of OSB board has usage class 3, which can be used outdoors without restriction. Type 1 and type 2 have service class 1, which means that they may only be used in dry indoor areas Type 3 and 4 are for use class 2, so they can also be used in damp areas will.

  • Usage area 1 means that OSB panels are humid at a temperature of 20 ° C wood Only a few weeks a year a humidity higher than 60% is reached. You will not encounter these conditions outdoors in the local latitudes. The panels are therefore only suitable for closed and mostly heated rooms.
  • In usage area 2, the wood may have values ​​of over 85% for a few weeks. In the outside area you will find this under roofs, for example with a ceiling paneling of the carport.
  • Since there is no use area 3 for OSB panels, you can usually only use them under wall cladding or roof coverings. Please note that covered areas can also fall into service class 3 under certain circumstances, if the building materials are very soaked and there is insufficient ventilation for quick drying cares.
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