Thank goodness for this forum. You guys have helped me quite a few times already. When the hole was cut for our wall thimble they ended up taking some extra out around the thimble (not purposely) and now I can feel a draft coming through. What would be the best thing to put there to insulate? I have attached a few pictures below to demonstrate what I mean. If you look around the all thimble there is an open space that I would like to close up. I am guessing that reluar insulation would be fine but I also found a 1” ceramic fiber insulation blanket on Amazon I was thinking would work but I was hoping for some opinions. Also can I caulk or put anything around the pipe going on the inside on the house where it goes through the thimble to seal that off. If you look at the bottom picture you can see a space between the pipe and the thimble where it doesn't fit tight.
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