Which has quot;betterquot; or is quot;more effectivequot; in insulating a 6quot; stainless steel chimney liner inside a 35' high 1927 built brick chimney without clay lining ? Brick chimney also sticks up 5' above roof. Vermiculite ? or 1/2quot; foil back ceramic wool blanket insulation kit ? Thank-you...... Looking for the most effective resistance to heat loss on liner due to creosote build up particularly at top . Want to use the foil back insulation kit over the vermiculite....easier to remove from chimney if ever needed if this is effective for my problem. Wood is not the problem , it is all hard wood over 2 yrs old confirmed...burns fantastic untill flu creosotes up at top.
It's vermiculite. This is a mineral, and some sources are a risk of asbestosis (disease of the lungs) so you can't readily buy it now. It's not hazardous if damp and in soil, it';s when it's in the air and you can breathe in the dust. Large quantities have to be removed by asbestos-removal companies - it used to be used for insulating houses. It must have been in the original potting mix for aeration. This is only a small amount and not that disturbed, so dispose of it in a sealed plastic bag.
