On Jun 10, 6:24�am, ransley wrote:
On Jun 9, 4:01�pm, JIMMIE wrote:

This past winter I found I had a cold wall in my home around my
chimney. I want to replace the fiberglass insulation in that �wall
with spray in closed cell foam. I dont want to open up the sheetrock.
It would be much easier to pull off the siding and spray it in from
the outside. Would this be problematic?

Jimmie

A problem is you wont know how much to put in, to little and its not
going to fill the cavity, to much and you will Bow the wall. I had a
house done, years later Ive opened several walls and non are fill up
right. The cold could be just from the cold brick itself transfering
in cold, or poor exterior brick to wall air seal.

pros have a minimally expanding foam that wouldnt bow walls.never seen
it DIY and around a chimney its likely not a good idea.

how old is the home / chimney.

does the chimney have a working fireplace on it or just a flue?