Question about chimney liner - Simpson DuraLiner...

[IK_biker]

... to be used for lining a masonry chimney (13" x 17" flue size) which is in very good condition.

The manufacturer claims their Simpson DuraLiner (rigid 6”) is "factory insulated".
I am about to use 10' of this thing up in the chimney, plus another 5' of their flex liner at the bottom to pass through the damper opening and connect to wood-burning insert.

The chimney is external, and that is why I'd prefer insulated liner. Can I count on this "factory insulation" or I would have to use a separate insulation sleeve (or wrap-around blanket)?

Looking at their spec sheets, ID, OD, and wall thickness listed, it is obvious that there's about 1/4" spare space between the inner and outer shells of the liner sections, and that is where I presume the insulation is. The question then would be, is 1/4 thick insulation sufficient?

On the other hand, these folks appear to know their business, and the fact that they only suggest using their insulation sleeves over flex liner sections, tells me they feel pretty confident the rigid sections do not need extra insulation.

Any ideas/knowledge/experience?

 

[jtp10181]

We have use the oval duraliner for rectangular clay flues and it works awesome. I would download the installation guide from their site and read through it as well. You will need a top plate kit with a cap to go along with the pipe, which comes with the support clamp. Also you will need a rivet gun because that's how the pieces go together.

 

[Lasher]

I just installed the Simpson Duraliner. The top 22 feet are the rigid and the bottom 5 feet are the "rigid" flex. (There is regular flex and a rigid flex. I believe you need to use the rigid flex stuff with the rigid pipe).

You are correct. The duraliner has two shells. The inside shell is stainless steel, then a layer of insulation and an outer shell (some other kind of steel). The duraliner is rated for a chimney fire and zero clearence with chimney. I was a little nervous at first about spending the money on the duraliner, but afterwards I think it was very well spent. The pieces got together (with rivit gun) very easily and create a tight seal. You can look at my profile and see the posts I put up about my installation.

By the way, with this stuff, my draft is awesome and I feel very safe with the product.

 

[IK_biker]

Thank you for the replies.

Manuals read, techs consulted, similar installations looked at, I now know what to order and how to go about this.

Case closed.
Cheers!

 

[Corie]

The Simpson Duraliner is nearly a Class A chimney system that you can drop down an existing masonry chimney. VERY good stuff. Hogzwild did it and I believe he was very happy, and remains very happy with the product.

 

[IK_biker]

Thank you Corie.

I have read a few posts about Hogzwild's experience with this stuff, and am all set to use it.
Dynamitebuys.com have very good prices on all Simpson products, and it seems they are going to get my business tomorrow.

 

[stoveguy2esw]

for tech info or to get answers for your questions directly look up simpson at www.duravent.com or call their tech support line (they are VERY good) at 800-835-4429 i talk to them a lot and they never fail to have detailed information for my customers. great product , great service.