dean
February 01, 2009 12:57 pm
Hi Steve
All factory made metal (twin wall) flue systems are just that, the better ones use a powder insulation but at £200 per meter plus locking bands cieling and roof supports and only a 15 year lifespan we never use them now. The rockwool type insulated ones are worse because over time the loose insulation breaks down and settles within the pipe leaving areas of flue that are un insulated, creating a fire risk
not the best of ideas imo.
The best flue systems are solid section pumice liners or flue blocks which can be brick clad above the roof line and plastered directly onto the system internaly, labour intensive but with cheaper materials and a 15yr garantee plus a life expectancy of 60yrs you get the best insulated, lasting, looking and performing chimney money can buy for not a great deal more than a pappy old stainles one.
Most importantly, do not fit them yourself, and solid fuel instalation has to be completed by a Hetas registered engineer, if you do not get a hetas engineer to at least inspect and sign off the work, you can encounter problems with insurance companies paying up or when you come to sell your house.
Oh and dont buy a cast iron stove!
Sorry, bit off topic, guess what i do for a living