Will my wood stove install be ok with a 2 ply chimney liner?

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VerdantGarden

New Member
Dec 31, 2025
3
Memphis
So I have placed the order for all my stove components from Rockford Chimney Supply. Between their self-help videos and the manuals for the stove I'm installing, I felt like I had a pretty good handle on what I'd need to complete the install. However, since then I've been reading more and more and it sounds like the liner I've decided on is an inferior choice for what I'm doing.

I decided to "splurge" for the higher quality premium flexible liner that Rockford offered instead of the standard 0.005" one they initially recommended. This premium liner is described as "manufactured from .010 316L stainless steel thickness which offers more durability in tight installations". This is the product I ordered with a 6" diameter and 25' long: https://www.rockfordchimneysupply.c...y-liner-only?_pos=4&_psq=premium&_ss=e&_v=1.0

After seeing people poo-poo the double wall liners in the forums I asked Rockford if this was a 2ply liner and they confirmed that yes it was. The experienced folks at Hearth.com seem to agree that 2ply is to be avoided, but that you should instead go for a single ply heavier grade flex liner (0.01" or 0.015"). Did I make a mistake getting this liner?

For reference the stove I'm installing is an Englander Blue Ridge 500 insert.

Thanks for reading, and thank you everyone for this forum. I've read so many posts, and it has helped me immensely. :)
 
So I have placed the order for all my stove components from Rockford Chimney Supply. Between their self-help videos and the manuals for the stove I'm installing, I felt like I had a pretty good handle on what I'd need to complete the install. However, since then I've been reading more and more and it sounds like the liner I've decided on is an inferior choice for what I'm doing.

I decided to "splurge" for the higher quality premium flexible liner that Rockford offered instead of the standard 0.005" one they initially recommended. This premium liner is described as "manufactured from .010 316L stainless steel thickness which offers more durability in tight installations". This is the product I ordered with a 6" diameter and 25' long: https://www.rockfordchimneysupply.c...y-liner-only?_pos=4&_psq=premium&_ss=e&_v=1.0

After seeing people poo-poo the double wall liners in the forums I asked Rockford if this was a 2ply liner and they confirmed that yes it was. The experienced folks at Hearth.com seem to agree that 2ply is to be avoided, but that you should instead go for a single ply heavier grade flex liner (0.01" or 0.015"). Did I make a mistake getting this liner?

For reference the stove I'm installing is an Englander Blue Ridge 500 insert.

Thanks for reading, and thank you everyone for this forum. I've read so many posts, and it has helped me immensely. :)
The pictures and description sound like a single wall midweight liner which is a great liner
 
That's what I thought too, but they said it was 2ply. So I assume there's another layer internally to make it smooth.
I'd call back and talk to someone else to verify...you don't want the 2 ply...I made that mistake, and it did just what these guys said it would.
 
What issues did you have? What was the wall thickness? Did it also have 0.01" 316L?
Aw, heck...I don't remember the details, I bought it in 2012 from Chimney Liner Depot...dunno if they are still around or not?
It was their "best" liner...well, let me rephrase, their most expensive liner.
The inner liner doesn't lay back down flat after being coiled for shipping...that makes nice little pockets/fins inside to collect creosote...and back then I had a smoke dragon of a wood furnace too...not a great combo.
Edit: I think it was the Flex King Pro...and looks like they are still around.
 
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That's what I thought too, but they said it was 2ply. So I assume there's another layer internally to make it smooth.
If the pictures are accurate it is not 2 ply. It is considered smooth wall as is