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EN 12326 - Thermal cycle test
With this test it is possible to make statements about the resistance
of a slate against weathering.
| Code |
Observation |
| T 1 |
no alteration of the appearance |
| oxidation of the surface of metallic minerals |
| alteration of the colour which neither influence
the structure of the slate nor build areas of discolouration |
| T 2 |
oxidation or alteration of the appearance
of metallic components with discolouration areas but without
alteration of the structure |
| T 3 |
oxidation or alteration of the surface of
metallic components which penetrate the slate and could
cause holes. |
Demands
in regard to the Thermal cycle |
Slates which show splitting, flaking off or other striking structural alterations are not permissible. T3 - slates which possibly become permeable to water, should be used only occasionally with special techniques of laying which prevent the penetration of water.
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