I am replacing everything from my wood stove to chimney cap so I want to make sure to do it right the first time. I am installing type 2 thermal protection boards on the wall behind the wood stove with the required 1” air gap. I have double wall Duravent DVL pipe from the flue up. My question is how far above the top of the stove should the wall protection boards extend? The manual with the boards says 8” on each side of the stove but does not say how tall above the stove it needs to be.
Thermal wall protection
- Thread starter wybroncos
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Got it sir. The 18" clearance in this case, it to the stove pipe. Single-wall sp requires 18" clearance but if it is connected with double-wall then the clearance drops down to 6", with no wall shielding. Or pipe shields could be attached to the single wall to bring it down to 6". If you still want to put up a wall shield for single-wall stove pipe then it needs protect the wall all the way up to the ceiling support box or the wall thimble. If you can post a picture of where it's going we can look for other possible issues.
There is no need or gain from using a type 2 board for a wall shield. The air space behind the shield is what's doing the work. A sheet of steel, or tiled cement board is sufficient. It must have a 1" + gap at the bottom and must be open at the top so that air can freely convect behind it.
There is no need or gain from using a type 2 board for a wall shield. The air space behind the shield is what's doing the work. A sheet of steel, or tiled cement board is sufficient. It must have a 1" + gap at the bottom and must be open at the top so that air can freely convect behind it.
The way I read the manual it is 18” from the flue collar to combustibles and 28” from the back of the stove to combustibles. I have double wall Duravent DVL, including the adapter at the flue collar, all the way up to ceiling support box. So yes the pipe can be 6” from the bare wall. But to line up with the ceiling support the stove will be 21” from the bare wall and the DVL will be 14” from the wall. To my understanding there still needs to be something between the stove and the wall, correct? I already have 1 36x48” type 2 stove board, mounted sideways this gives 8” of protection on either side of the stove. But the board will only extend above the top of the stove by 3”. I cannot find any requirements or recommendations on how far above the top of the stove needs to be protected when the stove will be sitting 7” closer to the bare wall than is allowed in the stove manual.
When I bought this house it already had a stove with single wall pipe already installed. I never trusted that any of it was installed correctly. Last winter that stove ran away, I’m fairly certain it had been overfired previously. Our neighbor let me borrow an old Sears circulator. It ran away too because we didn’t know that it had a crack in the fire box. The old ceiling support was not installed correctly at all. We have torn out all of the old. Right now the only thing that I have physically replaced is the ceiling support box and chimney. The DVL, adapter, and stove will be here next week. So I don’t have much to take pictures of besides the ceiling support box. After 2 runaway stoves in one winter I want to do this right so I don’t have to lay awake at night wondering if the stove is going to burn the house down.
ctreitzell
Feeling the Heat
I don't know about code, I just came to say sheet metal is incredibly reflective of heat in these circumstances. Behind my Panadero I installed a half sheet of fire resistant drywall (pink paper; fiberglass impregnated). I installed this fastened directly to the room's drywall surface. I then clad this drywall with sheet steel. My Panadero is installed at the manufacturer recommended distance from the wall.
When the stove is running, the sheet metal does not heat up very much, it actually feels cool to the bare hand touch. The drywall beyond the sheet cladded area heats up much more than the steel does.
I'm just purely saying I continue to be surprised at how effective the reflective properties of the sheet steel are.
When the stove is running, the sheet metal does not heat up very much, it actually feels cool to the bare hand touch. The drywall beyond the sheet cladded area heats up much more than the steel does.
I'm just purely saying I continue to be surprised at how effective the reflective properties of the sheet steel are.
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