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Fiberglass Insulation

Fireplace door insulation allows you to fill in the spaces between your door frame and the surrounding surface. Our black or white fiberglass insulation is available in widths of 1.5 or 2 inches, and is available in 10 or 11 foot rolls. Use the entire length, or cut to size for smaller gaps. Our fireplace insert insulation is an easy-to-use, self-adhesive brand that forms a smoke-tight gasket between the door frame and your facing material.


How to Replace Insulation in Fireplace Doors

What will you need?

  • Screwdriver
  • Work gloves
  • Fireplace self-adhesive insulation strips

There should be no fire burning in your fireplace and the doors room temperature. We recommend having an additional person to help out.

STEP 1: Loosen the lintel clamps holding the door frame while your assistant supports the frame so it doesn't suddenly fall to the floor.

STEP 2: Wear your gloves to protect your hands from the fiberglass splinters and pull away the old insulation stuck to the frame and/ or fireplace. If any sticky adhesive is left behind, scrape it off.

STEP 3: Apply the new, self-adhesive insulation around the frame.

STEP 4: Move the frame back into position with the lintel clamps and tighten the frame back over the fireplace opening. Screw the clamps until the insulation is pressed between the frame and the masonry of the fireplace.