Thermal Thermal

Isover Vario® Xtrasafe

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Vario® XtraSafe helps to enhance the thermal performance of the building by removing unwanted draughts whilst protecting the building structure from damage caused by moisture.


An innovative membrane system designed to manage moisture within frame and lining systems whilst maintaining or enhancing airtightness.

The Vario® system provides the best possible protection for the structure and enhances the occupant's thermal comfort and wellbeing.

  • Full building airtightness solution which can easily exceed Part L regulations
  • Improves the energy efficiency of the building and enhances thermal comfort by protecting against leaky cracks and joints
  • Protects structural elements from moisture accumulation and ensures insulation works to optimum levels
  • Ideal for timber and steel frame construction and habitable loft spaces.


Saint-Gobain Isover