Chimney Liner Insulation Kits include everything you need in one box: precisely sized foil faced 1/2" or 1/4" insulating blanket, retractable mesh, spray adhesive, foil tape and clamps. Safer than ceramic wool (aluminum silicates). Moreover, this means less skin irritation — breathe easier knowing that our insulation is carcinogenic free.

Not only is Chimney Liner Insulation used to help prevent chimney fires, but it also keeps flue gases warm, reduces creosote buildup, and meets various code requirements. Rockford's chimney liner insulation is UL Listed for use with our flexible liners and free of carcinogens (unlike the competition's ceramic wool insulation).

Additionally, the diameter in the dropdown menu equals the size of the flexible chimney liner you're insulating.

Chimney Liner Insulation UL Listing

To maintain UL Listing 1777, 1/2” of insulation between the masonry and the liner provides for zero clearance between the exterior of the chimney and combustible materials. As a result, 1/2” insulation kits will add about 1.5” to the outside diameter of the liner.

To maintain UL Listing 1777, 1/4” of insulation between the masonry and the liner provides for 1” clearance between the exterior of the chimney and combustible material. As a result, 1/4” insulation kits will add about 3/4” to the outside diameter of the liner.

Each Kit Includes:

AES (Alkaline Earth Silicate) Chimney Liner Insulation Blanket; 3mil protective foil facing insulation wrap
Insulation Spray Adhesive
Stainless Steel Retractable Mesh
HVAC Foil Tape
Stainless Steel Clamps to secure insulation onto the flexible chimney liner
Complete Installation Instructions

Video: How to install a flexible chimney liner and insulation blanket

Insulation Requirements & Benefits

Without a doubt, one of the most frequently asked questions is "Do I Need to Insulate My Chimney Liner?". As a matter of fact, for solid fuels, the answer is yes and typically required. On the other hand, it's recommended for gas and oil, but not always required.

For example, here are a few articles we've written to help you understand chimney liner insulation requirements.

In conclusion, it is always a good idea to insulate your flexible chimney liner if you have room in the flue to do so. Contact a Rockford Certified Technician if you still have questions!

Chimney Insulation

Chimney Liner Insulation Blanket Kit

Chimney Liner Insulation Blanket Only

Chimney Insulation Mix - Everguard