I have a Montlake 300 on order that I want to install into my 70s house that has a heat form (I'm pretty sure), along with demo'ing the existing green rock fascia and remodeling with something else. I need to have this installed for winter!
I started happily demo'ing the green rock above the firebox, then paused for fear of loading bearing concerns around the heat form. I understand most people just cut out the damper and the backside to make enough room for the liner, but since I'm remodeling the whole fireplace anyway, and I want to add things like electric (for the fan) and Auber flue temp sensor, I might as well rip it all out...
Some facts
Rough goals / plan
Appreciate your advice.
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298721-9affb9745d398db7d2a02fec74ea81eb.jpg?hash=vNutvqRHkN)
I started happily demo'ing the green rock above the firebox, then paused for fear of loading bearing concerns around the heat form. I understand most people just cut out the damper and the backside to make enough room for the liner, but since I'm remodeling the whole fireplace anyway, and I want to add things like electric (for the fan) and Auber flue temp sensor, I might as well rip it all out...
Some facts
- Mid 70s house in Douglas County, NV
- Masonry/brick (upstairs), large stone/rocks (downstairs), and cement blocks make up the chimney
- 4 flue chimney, with terra-cotta liners in each. Upstairs open fireplace (heat form) on one side, and small Morso stove (no liner) on other side. Downstairs open fireplace (heat form with a gas line - I've capped off the gas) on one side, outdoor BBQ/smoker insert on the other side
- 3" drop from the hearth into the firebox (b/c of gas line)
Rough goals / plan
- Demo all the downstairs green rock, keeping the upstairs brick, open fireplace, and small stove as-is
- Remove heat form, or cut out what is needed (leaning towards removal, to make electric outlet, Auber sensors, etc easier)
- Install Montlake 300 with insulated flexible dual wall liner, roxul, back off plate, etc
- Remodeling of fireplace will likely have to wait til next Spring/Summer
Appreciate your advice.
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298712-52ef2bbbcc09354734c0739d52791f7b.jpg?hash=wycGPPMQKj)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298713-cd27c3f899edd2f6792eee6b42c0022e.jpg?hash=EXIvqSu_Vj)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298714-7a547bc92e8736cd814586756a62771d.jpg?hash=oJFlb5B4Pz)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298715-174967818dcefb5e35fa1886a76cb21c.jpg?hash=Uh9-bpVodJ)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298716-13fbf27a3e31156d3b85debe37a93217.jpg?hash=7Z81REl2w0)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298717-bdd0beabb9e6f819ec5df3f5702fb6e6.jpg?hash=yHPvCS7UKZ)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298718-5b9b9bc8112370e49f8bbb2d7e6dbb19.jpg?hash=76Fhi_7jTS)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298719-9820e5ec295325366d03dee89f0a8250.jpg?hash=0IFgS0sTCB)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298720-6ad90e81d178be67883dc55e71a53fac.jpg?hash=3fXtoGpjF1)
![[Hearth.com] Replacing Heatform with insert, and demo/remodeling stone [Hearth.com] Replacing Heatform with insert, and demo/remodeling stone](https://www.hearth.com/talk/data/attachments/298/298721-9affb9745d398db7d2a02fec74ea81eb.jpg?hash=vNutvqRHkN)
Last edited: