Jump to content

Recommended Posts

Posted

Small 7200 sq. ft., 25 year old, 1 storey professional building w/6 suites. Area separation divides to 3 attic spaces.

In one shared attic over a dentist office and insurance office, the blown-in fiberglass is like slate grey throughout, and dark black in 2 areas. I can usually find the cause of discolored insulation, but not this time.

Click to Enlarge
tn_2012115235414_102_0016.jpg

43.3 KB

Trusses, plywood decking and OSB gable sheathing have no discoloration.

No evidence of any previous fire or smoke and absolutely no odor.

No combustion appliances ever in the building (HPs & small elec. water heaters).

Only spots of very small previous flashing leaks.

No excessive moisture anywhere in the building.

No production/manufacturing ever in the building.

Posted

I'm with Jim,

It looks like old tech rockwool. See it all the time and every once in a while it's all churned up with other stuff that was blown in before or after.

ONE TEAM - ONE FIGHT!!!

Mike

Posted

Except those are batts, Kibble's stuff is clearly blown in.

The color of stabilized cellulose is changing. As newspapers shrink, local weeklies merge or disappear, and magazines go digital, manufacturers are looking at different material sources. Up to 1/3 of Applegate cellulose is made of 'brown board', essentially cereal box material.

It's very dark grey. I've never seen it black.

Posted

The pink is a few random batts. The yellow is the blown-in fiberglass that has turned gray in some areas and black in a couple large spots. It's not any type of mineral wool and nothing was added over the original insulation.

I can't open the link, but the pest control insulation I've seen is cellulose and a consistent gray throughout.

  • 3 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...