GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Proclima intello for hot humid climate in unvented attic

AlbertoArriaga33 | Posted in Energy Efficiency and Durability on

Does using a smart vapor retarder in a hot humid climate make sense? It seems to me that its low risk. During summer and high humidity situations it can open up past class 3 vapor retardancy to allow inward drying, and during winter, it can prevent interstitial condensation in an insulated cavity. Any thoughts on this? 

Context: CZ1, fiberglass only insulated cavity, vapor open (38 perms) exterior weather barrier, rain screen.

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |