Replies

1. GBA Editor
   Martin Holladay|Jul 25, 2015 05:49pm|#1

   Stevee,
   Be cautious in your interpretation of moisture meters. In a GBA article titledHow to Install Cellulose Insulation, Bill Hulstrunk explained, "Most moisture meters are set up for the density of lumber or drywall. If you talk to the [cellulose] manufacturers, they’ll tell you that the meters are not calibrated for the density of insulation, which is a low-density material. That’s why moisture meters tend to be misleading when used on cellulose. And you tend to get into questions about how deep you should poke it in. You’ll find that the numbers vary quite a bit depending on how deep you insert the probes."

   Your situation requires judgment. If the cellulose seems wet, I would pull it out and replace it with new insulation.

2. 
   Stevee Busser|Jul 26, 2015 01:42pm|#2

   Thanks for your response Martin! A section of wall under one of the windows that was leaking was removed and the insulation seemed to be dry. The flashing of the windows is now being repaired and once those repairs are completed I plan to engage a moisture expert...I want to make sure that the moisture that was in the insulation does not form into mold. Once I get the moisture analysis done, I plan to make a determination on whether there will be a need for more destructive testing and/or potential replacement of the insulation. I just don't know if the cellulose blown in insulation retains the water or not.