Hi,
We’re working with a local chimney shop in Nova Scotia to order parts and approve our plan. But we’re doing the installation ourselves on our 16×20 building.
It’s 2 storey with a non-vented cathedral ceiling.
We’re seeking advice here about our chase. We plan to make our chase airtight but we are not sure if we should insulate it inside the building ?
Here’s a shortened list for our installation (I’ve included a rough drawing)
– Jotul F602 Woostove
– Double Wall (sealed) Stove Pipe
– Insulated Round Support Box
(We’ve called the manufacturer and they approved our idea of wrapping the chase with a vapour barrier from the cathedral ceiling to the floor where the stove pipe meets the chimney. They give the option of a regular Round Support box or an Insulated Support box that allows to seal to the vapour barrier. It looks like it’s the only option to make our chase airtight.
– Insulated ICC chimney
(Enclosed in a continuous chase from the interior to the exterior) We wanted to continue the chase above the roof for better flashing details with our standing seam roof.
– Vented flashing (it’s required to be vented because of our chase and non-vented cathedral ceiling)
– Storm collar and Rain Cap
We’ll also have a Radiation Shield Tube, a Roof Radiation Shield and a Cathedral Ceiling Radiation Shield to meet the shielding and fire stopping requirements for Canada and per the manufacturer recommendations.
We can’t stuff insulation in the chase so we are limited to wrapping the insulation around the chase.
Should we worry about condensation in our chase? Should we bother to insulate inside or outside the building the chase? Or does the stack effect with the vented flashing in our tall chimney chase will help keep it dry? The chase is just going to be light framing with drywall or plywood.
We’re not sure if insulation is needed if the chase is airtight ?
We’re not too worried about heat loss through the chase, but we’re confused around best practices.
Thank you for making it through this long post!
-Jeanne
We’re working with a local chimney shop in Nova Scotia to order parts and approve our plan. But we’re doing the installation ourselves on our 16×20 building.
It’s 2 storey with a non-vented cathedral ceiling.
We’re seeking advice here about our chase. We plan to make our chase airtight but we are not sure if we should insulate it inside the building ?
Here’s a shortened list for our installation (I’ve included a rough drawing)
– Jotul F602 Woostove
– Double Wall (sealed) Stove Pipe
– Insulated Round Support Box
(We’ve called the manufacturer and they approved our idea of wrapping the chase with a vapour barrier from the cathedral ceiling to the floor where the stove pipe meets the chimney. They give the option of a regular Round Support box or an Insulated Support box that allows to seal to the vapour barrier. It looks like it’s the only option to make our chase airtight.
– Insulated ICC chimney
(Enclosed in a continuous chase from the interior to the exterior) We wanted to continue the chase above the roof for better flashing details with our standing seam roof.
– Vented flashing (it’s required to be vented because of our chase and non-vented cathedral ceiling)
– Storm collar and Rain Cap
We’ll also have a Radiation Shield Tube, a Roof Radiation Shield and a Cathedral Ceiling Radiation Shield to meet the shielding and fire stopping requirements for Canada and per the manufacturer recommendations.
We can’t stuff insulation in the chase so we are limited to wrapping the insulation around the chase.
Should we worry about condensation in our chase? Should we bother to insulate inside or outside the building the chase? Or does the stack effect with the vented flashing in our tall chimney chase will help keep it dry? The chase is just going to be light framing with drywall or plywood.
We’re not sure if insulation is needed if the chase is airtight ?
We’re not too worried about heat loss through the chase, but we’re confused around best practices.
Thank you for making it through this long post!
-Jeanne
![[Hearth.com] Insulated ICC Chimney and a Vented Chase (Airtight but not insulated ?)](/talk/data/attachments/337/337591-90abc895ec59ea4c9bd899f920cdfd9b.jpg?hash=8PHZViyQl0)
