How long would DuraLiner last?

[farmwithjunk]

Any idea the life expectancy of DuraLiner double wall in a masonry chimney only burning wood? I couldn't find anything online and nothing specifically for warranty. Outer is galvalume which I believe is most metal roofs and it lasts decades easily.

Found a PDF where they have 100% to 15 years and 50% after 15 years for warranty. Apparently not as much faith after 15 years.

Problem is it would be quite difficult to inspect the exterior portion without taking apart the rain shield.

 

[begreen]

Should last a long time if properly installed in a good chimney. I think @Hogwildz has had one installed since around 2009?

 

[bholler]

Yeah it's really going to depend on the chimney if the chimney isn't cleaned well and there is any moisture that galvalume could corrode pretty quick. If it's dry it will last a long time

 

[farmwithjunk]

Yeah it's really going to depend on the chimney if the chimney isn't cleaned well and there is any moisture that galvalume could corrode pretty quick. If it's dry it will last a long time

Its mostly free floating inside the brick chimney except near the bottom. Otherwise it's dry but I'd expect all chimneys that go below ground level to have some moisture.

 

[farmwithjunk]

The answer to my question was less than 2 years. It rotted from the inside out at the top section. Where the upper stainless lip meets the expanded galvalume it was rotted most of the way around.

After thinking about how this product is made I'm not longer a fan. It uses 4 small rivets to connect sections but uses the outer galvalume skin to connect to a stainless rounded cap that appears to be riveted to the inner section. If the galvalume would rust the chimney would just drop since it's suspended from the top only.

It also only uses a clamp that goes on the outer skin. If the galvalume rusts the clamp can loosen and pipe drop. This would cause it leak at the tee.

The price for this product, especially in 8" is really high for inferior metal being used. Just the 8" tee is $537 and $349 for each pipe section and $228 for the cap kit. That's $2165.

 

[kennyp2339]

The answer to my question was less than 2 years. It rotted from the inside out at the top section. Where the upper stainless lip meets the expanded galvalume it was rotted most of the way around.

After thinking about how this product is made I'm not longer a fan. It uses 4 small rivets to connect sections but uses the outer galvalume skin to connect to a stainless rounded cap that appears to be riveted to the inner section. If the galvalume would rust the chimney would just drop since it's suspended from the top only.

It also only uses a clamp that goes on the outer skin. If the galvalume rusts the clamp can loosen and pipe drop. This would cause it leak at the tee.

The price for this product, especially in 8" is really high for inferior metal being used. Just the 8" tee is $537 and $349 for each pipe section and $228 for the cap kit. That's $2165.

Oh man that sucks, would cutting a vent hole on the chimney help with letting excess moisture out of the masonry chimney?

 

[brenndatomu]

Why not use a liner that is all stainless, there are plenty of them out of there, price can't be much more either

 

[farmwithjunk]

Why not use a liner that is all stainless, there are plenty of them out of there, price can't be much more either

Duraliner does have a huge advantage in OD. They claim 8 and 5/8" for 0/0 insulated pipe. Can't get that small of OD in flex.

Show me an all stainless heavy wall pipe under 9" and I'll get it. I'm going with oval flex I think.

 

[farmwithjunk]

Oh man that sucks, would cutting a vent hole on the chimney help with letting excess moisture out of the masonry chimney?

The top plate already has an air gap around the pipe. I suspect creosote creeped in-between the crimped top section. It rusted top down and inside out. Moisture I'd think would be all over and on the outside. Chase is dry.

 

[brenndatomu]

Duraliner does have a huge advantage in OD. They claim 8 and 5/8" for 0/0 insulated pipe. Can't get that small of OD in flex.

You could get to about the same OD if 1/4" insulation is used instead of 1/2"...does Duraliner have 1/2" insulation?

 

[farmwithjunk]

You could get to about the same OD if 1/4" insulation is used instead of 1/2"...does Duraliner have 1/2" insulation?

They claim 1/2" insulation, yes. Obviously compressed. If they used a 304 outer shell is say their product would be top tier for wood. I just see why they cheap out on galvalume for a premium priced product.

 

[CanFireman]

As with chimney, liners are not intended to withstand repeat chimney fires. With each fire, you run the risk of causing irreparable damage.

Inspection by a qualified professional would likely identify the cause. If it is a product defect, they may warrant if you can show maintenance history. If attributed to chimney fire damage, then answer will likely be no.

 

[bholler]

As with chimney, liners are not intended to withstand repeat chimney fires. With each fire, you run the risk of causing irreparable damage.

Inspection by a qualified professional would likely identify the cause. If it is a product defect, they may warrant if you can show maintenance history. If attributed to chimney fire damage, then answer will likely be no.

This is corrosion of the galvalume outer shell. It's not chimney fire damage

 

[farmwithjunk]

As with chimney, liners are not intended to withstand repeat chimney fires. With each fire, you run the risk of causing irreparable damage.

Inspection by a qualified professional would likely identify the cause. If it is a product defect, they may warrant if you can show maintenance history. If attributed to chimney fire damage, then answer will likely be no.

It's never been remotely close to having a fire.