Application

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.

Description

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.

General information

Uniclass 2015

Pr_25_57_08_75 Reinforced bitumen roofing sheetsPrimary

CAWS

J41/10 Built-up reinforced bitumen membrane warm deck roof covering

J41/110 Built-up reinforced bitumen membrane warm deck roof covering

J41/12 Built-up reinforced bitumen membrane cold deck roof covering

J41/120 Built-up reinforced bitumen membrane inverted roof covering

J41/130 Built-up reinforced bitumen membrane cold deck roof covering

Specification data - Reinforced bitumen roofing sheets

Product Reference

Total Torch Vapour Dispersion Layer

Standard product features

Technical characteristics:

  • Size (l x w): 8 x 1 m.
  • Surface: Upper: Thermofusible polyethene (PE) film Lower: Silica sand with Styrene Butadiene Styrene (SBS) bitumen stripes finished with thermofusible PE film.
  • Material: SBS modified bitumen.
  • Reinforcement: Glass.
  • Weight: 32 kg.
  • Thickness: 3.4 mm.
  • Mass per unit area to EN 1849-1: 3.93 kg·m².
  • Tensile strength to EN 12311-2 (A): 700 N/50 mm (MD). 450 N/50 mm (TD).
  • Elongation to EN 12311-1(A): 4% (MD). 3.5% (TD).
  • Vapour resistance: >3000 MN·s·g-1.
  • Reaction to fire to EN 13501-1: Class F.
  • External fire performance to EN 13501-5: FRoof (t4).
  • Artificial ageing behaviour to EN 1296: Pass.
  • Dimensional stability to EN 1107-1 ≤0.5 %.
  • Resistance to Cold Bend to EN 1109 ≤-15°C.
  • Flow resistance at elevated temperature to EN 1110: ≥90°C.
  • Water tightness EN 1928 (B): Pass.

The external fire performance of a roof is dominated by the built-up roof system. No performance can be assessed for the product alone.

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