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

How to Measure Roof Insulation Thickness

james_talmage | Posted in General Questions on

A bit of a disagreement with my installation installer.

He wants to measure at the edge of the baffle (where it staples to the roof deck).

I want him to measure from the high point of the baffle.

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.


  1. GBA Editor
    Kiley Jacques | | #1

    Hi James,

    I shared your question with former FHB editor Matt Millham because I know his measuring skills to be superhuman. Here is what he said: Whatever the depth of the rafter is minus the depth of the baffle cavity . . . and minus the baffle thickness, if it’s made out of something other than thin plastic or rigid foam.

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |