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TLCSI — Shielding Insulation Wrap

How to Specify

Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design.

How to Purchase

TLCSI — Shielding Insulation Wrap


  • Insulation for use with Attic Insulation Shield, Wall Thimble and Cathedral Ceiling Support Box.
  • Protects building materials against radiant heat from the chimney.
  • Helps maintain temperatures within the chimney system and within the housing envelope to prevent condensation on exterior.
  • UL-listed specifically for TLC chimney.
  • Dimensions: 12" x 48" x 2"

TLCSI - Shielding Insulation Wrap - dimensional drawing