alwitra flat roof vent
For breathing space at lofty heights

Flat roof vents

alwitra flat roof vents for any situation

Every downpipe in the building must be routed over the flat roof as a ventilation pipe. Fortunately, this is not a problem with alwitra flat roof vents: the alwitra line vent forms the upper end of drainage downpipes above flat pitched roofs with waterproofing in all types of construction.

In cold roofs, the alwitra cold roof vent ensures appropriate air circulation in the air space.

  • For waterproofing all types of construction up to DN 125 (OD 125)
  • For seamless roof penetrations
  • Reducer optionally available for DN 70 (OD 75) downpipes
  • Connection to DN 125 (OD 125) and DN 100 (OD 110) downpipes under roofing membranes, with reducer (included)
  • Connection sleeve made of EVALON® or EVALASTIC® factory-fitted to the vent pipe and double-secured
  • Fast, tool-free welding

  • For renovation
  • Thermal insulation
  • Simple, safe connection of existing ventilation pipes up to DN 150 (OD 160), without removal with the new seal
  • CFC-free polyurethane integral foam
  • Factory-fitted EVALON or EVALASTIC sealing ring

  • Air circulation in ventilated buildings (cold roofs)
  • Connection sleeve made of EVALON or EVALASTIC, factory-fitted to the aerator pipe and double-secured
  • Waterproof
  • Drip tray for collecting condensation drops
  • Reduces or prevents moisture penetration of thermal insulation
  • Ventilation cross-section approx. 110 cm².