Robert’s Bath Cap Product Design

Design Features:

  • Largest flange of any bath cap
  • Noise-reducing damper
  • Removable bird screen
  • For 3″–4″ vent ducting
  • Can use for dryer venting — bird screen must be removed


Top Vent Cap: Made From Hi-Density Polyethylene

  • It’s light weight yet super strong and durable
  • Impact resistant. It will survive a hail storm
  • It’s long lasting and weather resistant

Base Flange Housing: Made From Linear Low-Density Polyethylene

  • Very flexible – you can bend it like a Frisbee without breaking it
  • Impact resistant – it will survive the impact of a nailing gun
  • It can be nailed at colder temperatures

Both assemblies have a long-term UV stabilizer added to extend the bath cap lifecycle and consist weathering of the color.

Robert’s bath roof cap – invented and owned by J. Robert Companies. Manufactured/distributed by Aroplax Corporation, Monticello, MN. Invented by a roofer who was tired of working with a bath cap that caused issues and callbacks.