GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X 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

Flash and batt

Seth001 | Posted in General Questions on

Looking at doing a flash a batt detail for my exterior walls. Northern Iowa climate zone 6. Here’s my thoughts. 2” halo exterra gps outside the wall with a rain screen, 2” spray foam, 3.5” real wool batt giving me a total r of 37. Or instead of 3.5” batt filling the rest of cavity with real wool blow in for a little higher total  r value of 39. Does this sound like a good system? Any thoughts or input would be greatly appreciated. Thanks!!

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

  • |
  • |
  • |
  • |