Vario System

The ISOVER Vario System is an intelligent airtightness and moisture control system.

This airtightness and moisture control system comprises of a range of intelligent membranes, tapes and sealant. It adapts to the climate and protects your building against moisture and dampness, inside and out. Airtightness also protects the building fabric against damage, helping to maintain its appearance and extending the building’s life.

The Benefits of the ISOVER Vario System

The ISOVER Vario System comprises of two intelligent airtightness membranes - accessory tapes and a sealant.These intelligent airtightness membranes help prevent your home from airtightness and moisture. Other benefits of using the ISOVER Vario System are:

  • Excellent levels of airtightness within the building

  • Protection against moisture by facilitating the drying of the building structure

  • Variable Sd value and can diffuse 25 more times more moisture in summer than the structure absorbs in winter

  • Improve your building energy rating (BER) and reduce environmental footprint of building

  • Help save money

  • Increase home comfort

  • One of the safest systems available

  • Meets and exceeds industry standards
ISOVER Airtightness


What is Airtightness?

Ensuring your home is airtight and protected from moisture is extremely important.


Airtightness protects the building fabric against damage, helping to maintain its appearance and extending the building’s life. Only when the construction is airtight can warm air be retained within the building and cold air kept outside. Preventing unpleasant draughts means greater living comfort and increased energy efficiency, which in turn leads to lower heating costs.


Another reason airtightness is important for your home is to protect against moisture and dampness. Within buildings, people, animals and plants continuously release moisture. During the colder months of the year, when the interior temperature of the building is higher than that outside, this moisture is carried outside with the warm air through joints and cracks. This moisture is then condensed within the building structure. This uncontrolled penetration of moisture is equally damaging for both solid and lightweight constructions. The only way to avoid this from occurring is a by making the building shell airtight.


To avoid unpleasant draughts and dampness in your home, we recommend installing the ISOVER Vario System. The Vario System will provide you with high performing airtightness and moisture control. For more information on the products in the Vario range, please click on any of the product images below. For information on the Vario Xtra range and Vario XtraSafe membrane, which will help you achieve the highest levels of airtightness whilst saving you time, you can download the Vario Xtra Brochure here.