Insulation around the chimney

[lolsen]

Brian

He is WETT certified and a head of knowledge. This is something that is new. He has only done one install with it and likes it. He is also going to see if it can be used on gas chimneys. I will update if I find out more.

Lawrence

[Greg Veal]

I agree. I know of no B'vent/Double-Wall flue vent material(s) rated for less than 1" clearance, running Horiz. or Vert., through any combustible materials.

I see insulation like that shown, in framed chases all the time. I also see those same chases with no firestops between floors as well.

In my area I see these oversites as ignorance and/or laziness on the part of our local housing inspectors, and have discussed it with a few that I'm friendly with. We're still friends.

[Brian A. MacNeish]

Originally Posted by cbottger

I nailed this one yesterday someone is going to have a lot of fun removing that insulation need to have wings

Forgot to mention this the other day. That first picture is one of the largest open top chimney chases I have seen in years. A great path for exfiltrating air plus heat movement through wallboard and convecting cool/cold air dropping while warm air rises......all in one little space. Depending on size of house, this could be 5-15-20% of heat loss from the dwelling!!! Hope you recommended an insulated, airtight, safe ceiling infill for this area.