Clearances to combustibles with attached noncombustibles

[diyfireguy]

I am planning on putting an Evergreen Lopi Stove into a brick alcove. The brick alcove is located on the exterior of the house. The face of the alcove is drywall and plywood inside the house.

My questions is this. As long as all combustible material stays outside of the combustible clearance range does it matter if noncombustible material is attached to that combustible material and passes inside that range? Or does having that noncombustible materiel attached to the combustible material change the clearance requirements?

Basically Im planning on replacing the combustible wall above the alcove with horizontally placed Metal studs and then cement board on top. I would keep the wood studs on the sides of the alcove as they meet the combustible clearance range but I would plan on attaching the metal studs and cement board to them. We are hoping to have something that looks similar to the below image. If we do a mantel it will also be non combustible.

 

[Whitenuckler]

I am not an installer by any means, but I did make my own gas fireplace front. You have to connect non-combustibles to combustibles at some point normally, so that should be fine as long as you follow the alcove chart. What space will you have between the stove top and the top of the alcove? Will you have lots of room on the sides and back?

I was just reading your vent post and re-read that alcove spec. It appears you need a 1 inch ventilated gap in between materials so they will not be joined.

 

[begreen]

Lopi has strict alcove requirements for their stoves. Download the manual and follow accordingly.

Can you post a picture of the existing setup? What is the ceiling of this alcove made of? Is there a ventilated air gap?

 

[diyfireguy]

I am not an installer by any means, but I did make my own gas fireplace front. You have to connect non-combustibles to combustibles at some point normally, so that should be fine as long as you follow the alcove chart. What space will you have between the stove top and the top of the alcove? Will you have lots of room on the sides and back?

I was just reading your vent post and re-read that alcove spec. It appears you need a 1 inch ventilated gap in between materials so they will not be joined.

The alcove is hollow its a brick chimney chase that goes through the roof. I will be replacing everything above the alcove hole with noncombustibles But wondering if I can keep the studs on the sides wood as long as they are out of combustible clearance range. I will also be installing a noncombustible ceiling just above the stove according to clearance guidelines.

 

[diyfireguy]

Lopi has strict alcove requirements for their stoves. Download the manual and follow accordingly.

Can you post a picture of the existing setup? What is the ceiling of this alcove made of? Is there a ventilated air gap?

Theres no ventilated air gap. And theres no ceiling in the alcove per say. But the face of the alcove on the inside is drywall. I would be replacing the wall above the alcove with non combustibles.

 

[diyfireguy]

Lopi has strict alcove requirements for their stoves. Download the manual and follow accordingly.

Can you post a picture of the existing setup? What is the ceiling of this alcove made of? Is there a ventilated air gap?