Is Chimney Liner Insulation Required? Chimney Insulation Information

Is Chimney Liner Insulation Required? Chimney Insulation Information

Do I need chimney liner insulation?

This is a common question you might be asking yourself when you are getting ready to purchase a stainless steel chimney liner. It is always a good idea to insulate a stainless steel chimney liner. The insulation will enable the flue to heat up more quickly and to a higher temperature. This helps reduce the risk of having an inadequate draft. In addition, while the flue gasses stay hot, less creosote will form and less fuel will be wasted.

Types of Chimney Insulation

There are two main types of chimney liner insulation. The most user-friendly chimney liner insulation is the insulation blanket. The blanket is made of a high density insulation material know as alkaline earth silicate. The blanket will get wrapped around the chimney liner the entire length. This will add to the diameter of the chimney liner, so this route is not always practical. Do not use standard fiberglass insulation. Fiberglass insulation is not rated for very high temperatures.

If you have a tight flue and are unable to use the blanket insulation, the vermiculite chimney insulation mix is your next option. The vermiculite chimney liner insulation is made of vermiculite and Portland cement. Once the vermiculite insulation is mixed, the insulation is poured around the stainless steel chimney liner. The vermiculite insulation will harden after a week and will provide a zero clearance, U.L. listed insulation.

Installing a Chimney Liner with Insulation Blanket

If you are interested in purchasing a stainless steel chimney liner, chimney liner insulation will make a good addition to your investment. You can watch how to install a chimney liner with insulation here!

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Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney

Customer Testimonials

Back in July you gave me excellent advice re. sizing/purchasing a flue liner for the chimney associated with my wood stove. I'd like to thank you once agai... More

—AE Northfield, MN

A few weeks ago I ordered a chimney liner system for my fireplace insert. Your salesman recommended the liner system plus the insulating blanket. I just wa... More

—AH Happy customer

Just got around to installing my new smooth flexible liner and deluxe terra cotta cap (wow). The quality of your product is second to none. Very pleased an... More

—B.B. from Massachusetts

Thanks so much for the great tech service from Dennis, very knowledgable, friendly and proffessional.Your website is the best, beats your competition by fa... More

—Bill in Knoxville

Sue and Dennis, I received the final part of my order yesterday (the chimney cap that actually fits over the chimney chase). It looks wonderfu... More


Hello, I was shopping for an fireplace insert and called RCS to ask why they were so much cheaper than my local guy, the reply was " we sell thousand of th... More

—Chris, PA.