Vapour barrier

A vapour barrier is a transparent, white PE vapour barrier sheet that is air and water tight. Vapour barrier is designed specifically to ensure vapour tightness of insulated structures (roofs, external walls, secondary walls, etc.). The barrier is rolled out and then stapled, glued or nailed to the warm side of the insulation.
The seams must be covered with a sealing tape to guarantee continuous vapour and air tightness. The very high SD value means that the membrane has very low water permeability. This property ensures that, in combination with vapour-permeable eaves, any risk of moisture accumulation and condensation in the structure is avoided.

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