GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

With respect to exterior masonry chimneys, how do you insulate them to improve the overall thermal building envelope?

David W. Bearg | Posted in Energy Efficiency and Durability on

Without a fire going, the poorly insulating brick will suck heat out of the house, and when there is a fire going, insulation will allow more of this heat to flow into the house as opposed to merely heating the outdoors.

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. 69tbird9 | | #1

    If you install a Chimney Balloon http://www.chimneyballoon.us that will at least air seal the fireplace chimney low by the firebox. This eliminates the damper leekage which is usually the path of least resistance when the fireplace is not being used.

    I have seen the doghouse masonry chimneys that have been sided over with the vinyl siding with the insulation permanantly attached to it (Fullback), but that was only as a retrofit and I have a feeling that was a siding contractor that just didnt know any better. It didnt go above the roofline, but I am sure that stuff is not heat rated.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |