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shutterjen 12-09-2009 11:44 AM

Insulate fireplace chase
We have a wood burning fireplace as supplement heat. It has a large chase that rock is mounted to inside the house and is on an interior wall. How do we insulate the chase in the house, attic and part that is on the roof so the cold air does not come down and cause condensation with the heat of the stove pipe?

ausblake 12-09-2009 08:51 PM

can you get inside the chase from the attic. If you can someone could climb down and install it. If not then you have to open the chase up somehow.

shutterjen 12-10-2009 10:20 AM

Part of it is still exposed (new construction) but how do you do it? Just batts of fiber glass or insulate the stove pipe with like slip cover type insulation?

Marty S. 12-10-2009 06:33 PM

Need to leave a 1" clearance between the pipe and insulation.

ausblake 12-10-2009 08:31 PM

Unfaced batts will work best. Make sure you secure them in the studs good. The fireplace could overheat and cause problems if they fall on top of it. If it has a firestop at the celing level then insulate the top of that also. But check the manafacturers specs ont he clearance on the pipe. Some are 1" but some are 2" for wood pipe. Some of the older pipe can go right up against wood. If you don't have a manual you may can find one online.

shutterjen 12-10-2009 09:35 PM

How do you secure them to studs?

ausblake 12-10-2009 11:31 PM

I use a nylon type strapping. I cut it to fit tight and staple the strapping about every foot. This will not let it fold and fall out. You could also use the mesh they use for blow in insulation. Not sure what it actually called but it staples on as well. The strapping has always worked great for me. You should be able to pick it up in the plumbing or heating and air section at home depot or lowes.

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