Gross white stuff building up on outside of new steel liner

[letsbewarm007]

Had stove installed a few weeks ago. Hopefully burning more dry seasoned wood. Noticed this build up of these stuff on my liner and wondering if I should be concerned and what is causing this?

It flakes off easily
See pic

 

[jimmyjabjames]

weird.. interested in this. do you live near the ocean?

 

[all night moe]

Insulation?

 

[MRD1985]

Some type of furnace cement? It’s normally black, though.

 

[bigealta]

Insulation from the liner?

 

[Dieselhead]

Vermiculite?

 

[letsbewarm007]

weird.. interested in this. do you live near the ocean?

No inland Spokane Washington. It has been humid though

Insulation from the liner?

Yea maybe but why is it bubbling. I’ll call the installers and have them look at it

Vermiculite?

I didn’t think so it seems like ash

 

[bigealta]

bubbling? IDK.........alien blood?

 

[mellow]

Improper insulation is my guess, unfaced fiberglass melting due to heat.

At what temperature does fiberglass insulation melt?​

Fiberglass insulation begins to lose structural integrity at around 1,000°F (538°C) but doesn’t actually melt until reaching approximately 2,200°F (1,204°C). The glass fibers maintain their fire-resistant properties throughout their service life.

Will Fiberglass Insulation Burn? Fire Safety Facts - All Seasons Insulation Company

Will fiberglass insulation burn? Discover why fiberglass insulation is fire-resistant and how it performs in extreme heat.

asiccal.com

 

[stoveliker]

Yes thst thought crossed my mind.

But I hope the outside of that inner liner is not getting up to 2200 F... I'm not sure that can happen unless the inner liner has a hole. (And even then; I've never seen my probe above 900 F)

 

[mellow]

Old thread I found, sounds similar: https://www.hearth.com/talk/threads/melting-point-of-regular-pink-fiberglass.5040/post-264108

 

[stoveliker]

That was inside the stove.

If the outside of the inner liner reaches 2200 F, there are bigger problems.

 

[mellow]

That was inside the stove.

If the outside of the inner liner reaches 2200 F, there are bigger problems.

I agree, point being that it can apparently melt at lower temperatures. Could be some off brand chinese insulation that was sitting around that the installers decided would make a good "block off" for the guy.

 

[bholler]

My guess is someone used "fire foam" which is not fireproof at all. I would not use it until you figure out what it is