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Multi-Ply Focus

Multi-Ply roofing membrane is constructed from the following materials –

The PVC waterproofing rolls formulas are based upon polyvinyl chloride resin. Other elements are added to provide flexibility and stability. Examples include anti-oxidants, ultraviolet light absorbent, plasticizer and plastic filling agent

Characteristics

  • High tensile strength and elongation allows the substrate to move without cracking when the temperature changes.
  • The rolls are available in broad width. These can be efficiently hot-air welded and are easy to repair and maintain for many years.
  • Good vapour diffusion, easy discharge of condensate and moisture from the ground
  • Root-proof, chemical-resistant & age-resistant
  • Climate-resistant - flexibility even at -20 & no flowing at high temperature
  • Easy, mechanised, ‘cold’ installation

Technical Specifications

Multi-Ply comes in sheets of single-layer and laminated sheets with fibre felt or fibre as reinforced layers.

The products are available in -

Widths of 1.0m, 1.2m, 1.5m & 2.0m

Thickness - 0.5mm, 1.0mm, 1.2mm, 1.8mm & 2.0mm

Length of more than 20m.

Download Technical Data Sheet

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Proudly Accredited

Our development and supply of the Multi-Ply Roofing Membrane is recognised by the major industry bodies.

Installation

There are three approaches to installing Multi-Ply roofing membrane

  1. the PVC sheets are stuck with the adhesive which is coated on the whole surface or parts of the roof surface
    Lengthways adjacent sheets should be overlapped by at least 50mm.
    The end of a roll and the beginning of the next roll are connected through butt-jointing with a single-layer strip of PVC, with at least 20cm overlapping. For easy installation, the sheets should be folded once in middle.
    Coating with a paint-roller on the surfaces of the rolls and the ground separately is needed.
    The roll can be stuck to the ground half by half. A hot air gun is inserted between the two surfaces to weld the seams.
  2. Fixing of the sheets with setscrew is another option.
    First, the sheets should be spread out with a 10 cm seam width. 5 cms of this is for the washer which is set under the sheets.
    Holes of diameter less than that of the setscrew are drilled with percussive driver according to the predetermined space between. The washer can be fastened with a screwdriver.
    A single layer of PVC strip at least 20cm wide is required to lap over and seal the seams.

Welding

The welding gun and the welding direction should form an angle of 45 degree. A space about 0.5cm should be kept between the welding burner and the steel roller pressure, which should not move too fast. If the welding burner of 20mm width is used, both sides of the strip should be welded to a width of at least 15mm. If the welding burner of 40mm width is applied, the middle of the strip of 25mm width should be welded to ensure continuity of the contact sheets.

The width of the welding bead should be in accordance with our instructions to ensure efficient installation and low maintenance.

Application

The PVC sheet forms an effective barrier to liquid water or water vapour. This applies equally to –

  • Roof construction
  • Green roofs
  • Blue roofs
  • Industrial and civil engineering projects
  • Underground engineering projects, such as subway & tunnel
  • Water conservation work, such as water pools, ditches, shelters, grain depots, land filling, dykes, sewage treatment and basements
  • The slip-resistant surface provides added protection against impact damage - suitable for open plant roof areas
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