Description :

Pre-fabricated waterproofing membrane for specific use as a total barrier to the passage of vapour.
The waterproofing mass is made of distilled bitumen and elastoplastic polymers (APP), reinforced with a rot proof fibre glass reinforcement and aluminium film which allows to obtain a barrier to the transmission of vapour. Due to the characteristics, the membranes of the Technobit Vapour Barrier  range are used with success in the waterproofing of both civil and industrial works where required, with the use of thermal insulation, as an absolute barrier to the transmission of water vapour. In the stratification of the roof, the Technobit Vapour Barrier must be positioned under the insulation, in order to preserve it from phenomena’s of water vapour condensation, which surely occurs, with the excursion changes of the thermal conditions of the roof.

Method of Application :

For the application of the membrane the use of heat is generally used by means of a gas torch or specific hot air machine. The application by heat is not suggested when on heat sensitive materials (polystyrene insulation).

• Coordinate the operations in a way to not cause damage to the construction elements and underground structure. Avoid to leave the structure for the night or for periods of prolonged work interruptions without having been properly
sealed.
• The application surface must not have any depressions to avoid the risk of ponding water, the slope must be at least 1.5% on concrete decks and 3% for steel or wooden ones, this to guarantee a proper run off of rainwater.
• The water drainage spouts should be sufficiently big enough to allow for rain water to be eliminated in an efficient way.
• Prepare cementitious substrates, including verticals and details, with a bituminous primer either by brush or airless, approx. 300/400 g/m2
. • Allow this preparation layer to dry before proceeding with any other operation.
• With prefabricated constructions, apply a suitable reinforcing strip along all joints. In the presence of construction joints, prefabricated panels or metal decks, suitable expansion joints are to be considered.
• The membranes must be applied to the substrate fully bonded.
• All details, perimeters, verticals, change of slope as well as projecting area must be fully bonded.

Storage & Handling :

Technobit Vapour Barrier rolls should be kept in an upright position in a flat, properly ventilated and sheltered storage area.