Welding tools

Application Guidelines - Welding

Monarplan PVC roofing membranes are hot air welded to each other and to PVC accessories in a homogeneous manner. The welding zone must be clean (free from dust) and dry. All welds shall be a minimum continuous width of 40mm.

The roofing membrane must be unrolled without tension and free of wrinkles. On heat sensitive substrates (eg. foamed insulation boards) and on curved decks (vaults) as well as on soft or uneven substrates, the overlap should be increased according to the situation.
To achieve a good weld, the following criteria should be considered:

  • Welding temperature 
  • Welding speed / traction of the welding machine,
  • Volume of air as well as the ambient temperature
  • Membrane temperature
  • Water absorption

Hot Air Welding Techniques  T Joints & Cross Joints  Testing and Checking Welds


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