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Bitumen Flat Roofing

Bitumen, also known as asphalt, is a sticky, black and highly viscous liquid or semi-solid form of petroleum. Thanks to its waterproofing qualities, it is widely used in construction. Bituminous membranes are perfect for waterproofing roofs, basements, below-ground structures, bridges and other structures.


Typical Application Areas for Bitumen

Comet hangar roof after renovation of bitumen roof


Bitumen Terrace of Residence building in Muehlau Kirchgasse


Application of bituminous membrane on a podium


Builiding with green roof in the mountains

Green Roofs

Types of Bitumen Roof Technologies

Torch-applied Bituminous Membranes
Bituminous waterproofing membrane

Once applied, Sika’s bituminous membranes are a thin layer of watertight material fully-bonded to the surface. It is a flexible system, able to maintain its waterproof capacity without causing cracks.

Main Uses
  • Retaining walls, basements and below-ground structures
  • Flat roofs under protective layers of ballast 
  • Balconies and terraces under tiles
  • Wet areas
  • Underground car parks
  • Bridges
  • Raft slabs and foundations
  • Protection of various substrates in a wide range of applications
  • Fully-bonded system
  • Resistant to the most extreme weather conditions
  • Ease of maintenance
  • Excellent mechanical properties
  • High resistance to mechanical damage and punctures
Self-adhesive Bituminous Membranes
Bituminous Membrane Basement from Outside

Self-adhesive bituminous membranes are covered by a release liner, which is removed during application.

Main Uses
  • Wood substrates
  • Flammable areas
  • Small areas, vertical surfaces or those areas with difficult access
  • Retaining walls, basements and below-ground structures
  • No torch needed
  • Safer, faster installation
  • No special equipment needed
  • Excellent adhesion, even at low temperatures