No i am not saying they are not safe I work on many clay lined chimneys with wood stoves in them a few have proper clearance but most do not. We tell the customer that they are not up to code but if they choose to use them anyway that is up to them and we will clean them. But when i put a liner in it needs to be up to code and it is a pretty safe assumption that somewhere there is a combustible material to close to that chimney. And regardless of the code issue liners work better when they are insulated.
Block off plate . Do I really need it?
- Thread starter Dmitry
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For sure. Just don'tgo scaring folks into thinking that all liners must be insulated, that's just not true.
I am sorry but if you look at the ul listing they all do when installed for a wood burning appliance in order to maintain that listing. Unless like i said they were tested with the proper clearances and no insulation which i have never seen. And as far as how many don't need insulated because the chimneys have proper clearances i would say 1 or 2 out of 50 chimneys i inspect have that clearance. I see many chimneys in new construction that don't have it. The reason is that it is very difficult to build one with those clearances the whole way. So i am sorry but in my opinion every single liner should be insulated and most need to be in order to meet code. I am not trying to scare anyone i am just telling people what i have seen and learned in my years of experience and the many thousands of chimneys i have inspected and worked on. And btw i never said all liners need to be insulated by code just most.
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