Pre-fabricated composite waterproofing membrane. The compound is made of distilled bitumen and elastomers (SBS type), reinforced with fiberglass and aluminium metal sheet that allows to obtain a barrier against the passage of vapour. The NORDSTRIP VAPOUR BARRIER membrane on the exposed side features a series of stripes formed by a special heat activated compound, separated by fine sand, which ensures a strong and durable adhesion to the insulating panels. The advantages of the NORDSTRIP VAPOUR BARRIER are basically those aimed at avoiding the use of oxidized bitumen and cold bonding substances (mastic, polyurethane glues, etc.) for the application and adhesion of insulating panels. In addition, the stripes ensures perfect adhesion on the entire surface of the insulating panel.