Wall Thimble Against Insulation.....

[ckdeuce]

I installed our new Mansfield yesterday. Wooo!! I used a wall thimble kit, and did not see anywhere in the directions on what to do with the insulation in the wall. I just cut the hole, removed enough insulation (blown-in celuose) and put the thimble together. Is it ok that the insulation will eventually settle and rest against the outside of the wall thimble? I imagine it is safe..... The thimble gives the needed 2" clearence for the class A pipe that goes through the wall... Is that enough?

Should I have boxed in the thimble so that the insulation will never come in contact with it?

Anyone else just let the insulation rest against the thimble?

Thanks
Chris

 

[Dr_Drum]

Yes, my insulation is in contact with my thimble. I have fiberglass insulation which I was not able to get to burn with a blow torch. I think cellulose is also very safe but didn't read this entire web page. http://www.rtekinsulation.com/cellulose-fire-resistance.htm
I believe the air gap in the thimble is supposed to be the required minimum distance to combustibles. Niether insulation would be considered a combustible.
Mike -