Total Torch Vapour Dispersion Layer

Total Torch Vapour Dispersion Layer is a glass fibre reinforced SBS-modified bituminous membrane. The upper surface is finished with a thermofusible film. The underside surface has specially formulated low melt bitumen stripes with quartz sand between to prevent adhesion during application. The underside is finished with a thermofusible film to prevent sticking in the roll.

Stripe technology:

When trapped pockets of vapour in the system begin to warm up they expand and can form blisters. The specially formulated striped resinous profiles are optimally spaced to cover 50% of the membrane surface. The areas between the striped profiles are coated with a quartz sand mixture toprevent adhesion during application creating resin-free channels. The resin-free channels allow any trapped vapour to dissipate along the channels under its own pressure thus preventing blistering.

Features and benefits:

• Impervious to water.

• The material is not susceptible to insect attack or pest damage and is unaffected by fungi, moss, lichen, moulds or bacteria.

• Unaffected by freeze/ thaw cycling. It will support temperatures from -10 to +90 °C without damage.

• The product used in conjunction with a suitable Icopal SBS capsheet may be expected to last 20 years

• The product is compatible with most building materials with which it is likely to come into contact with during roofing works.

• CE marked (EN 13707, 13, 0086-CPD-505779).

Applications:

Suitable for use as a partial bond underlay within a high performance bituminous built-up roofing system by eliminating blistering created from the build-up of water vapour pressure within the roof construction. It is suitable for use on both new and refurbishment projects.

Hydrocarbon solvent-based products, such as Naphtha, paraffin and creosote will have a harmful effect and should not be allowed to come into contact with these membranes.