Why reline a chimney?
Everyone using a chimney is responsible for it's maintenance.
A duct that is poorly maintained, or remains unused for a long period of time, can be problematic and even dangerous. There is a risk the flue won't draw properly with potential problems of condensation, leaks, deterioration of masonry and even worse, risk of carbon monoxide poisioning or even catching fire.
Regardless of the technique used, lining a flue can guarantee it's air-tightness and safety of use.
Relining a chimney flue can also help improve the performance of a high efficiency stove. With stoves getting evermore efficient there is less and less heat (energy) available for the flue to perform adequately.
The flue for an open fire is much larger than that recommended for most high efficiency stoves. So when you install a high efficiency stove into a flue that was designed for an open fire you can't expect it to perform.
This can lead to many problems including heavy tarring of the flue as the heat is no longer there to carry the fire gases (smoke) up and out of the flue before they reach due point and condense in your chimney.
An open fire with an efficiency of 37% and a heat output of 2.9kW would give 4.9kw of heat into the flue.
A multi fuel stove with an efficiency of 82% and a heat output of 4.9kW would give 1.1kW of heat into the flue.
By decreasing the diameter of the flue to one recommended by the manufacturer and the current building regulations there will be less heat needed to make the chimney perform at it's best.
We can take this one step further by insulating around the new flue with Vermiculite which will help maintain the flue gas temperature until it exits at the chimney pot.
Flexible metal liners:
I offer a flexible twin-skinned stainless steel flue wall lining with a smooth inner wall. The system has been designed to upgrade existing chimneys which have failed, or for use where the performance is not adequate for modern conditions.
The liner that I supply is classified as a class A flue liner and is suitable for gas, oil, and multi fuel, including wood burning appliances where the maximum flue temperature does not exceed 500 Degrees celcius.
It is manufactured in two skins of either 316 grade or 904 grade austenitic stainless steel. With diameters ranging from 125mm to 400mm.
Dinak Twin Wall (Rigid Flue)
This is a rigid flue system that may be used to take a flue system through a wall to run up the outside of a dwelling or through the ceiling and roofspace.
This system has an insulation around the flue between 30-50mm that helps to keep the flue gases warm so they can evacuate at the chimney terminal.
We also offer other solutions for relining a flue, please contact us for further information.