Wood Stove Lining
We highly recommend that brick chimneys serving wood burning stoves are relined and redesigned specifically as log burner flues, and here's why.
When using a log burner, the internal chimney flue gas temperatures are much lower than with an open fire chimney. The control of a wood burner allows you to slow the movement of smoke inside the brick chimney flue. Cooling smoke turns to creosote which can seep into the very structure of an old brick chimney, making it impossible to clean properly and increasing the chance of a chimney fire. Fitting a wood burning appliance to an old brick chimney without relining using an insulated stainless steel flexible liner is very hit and miss and so can be very dangerous.
As with all types of fuel, carbon monoxide is released when burning wood in a wood stove. Installing a smaller dedicated 6 inch (150mm) insulated chimney flue liner for a wood burner ensures that the flue gasses and smoke are kept as hot as possible, until they reach the top of the chimney. By insulating you will reduce soot and creosote build-up within the flue, giving a more efficient wood fire combustion.
What diameter flue liner for a wood burner?
Until 2010 the UK building regulations stated that the minimum internal flue diameter required for a wood stove was 6 inches (150mm). A revision of part J of the building regs, in consultation with one foreign stove importer, now allows a minimum flue diameter of a liner to be 5 inch (125mm) but only if the stove is DEFRA approved. In reality, 5 inch liners are now used in most situations, it has nothing to do with a safe long lasting installation but only panders to those who want to sell as many stoves as possibly while offering the simplest, cheapest method of installation for engineers who traditionally fitted 5 inch liners for gas fires. 5-inch liners for wood stoves will clog with soot quicker, will 'snake' inside a long brick chimney and may cause smoke spillage. Best to use a minimum 6 inch diameter liner every time!
Aways insulate the brick void around stainless steel liners for wood burning stoves using a suitable insulating back fill such as vermiculite (if site specifics allow) or if the existing brick chimney is larger than 9 inches x 9 inches, use an insulating flue wrap to ensure the hottest flue gasses possible are achieved. Insulating the liner reduces condensation build up around the flue and noise from the chimney stack, especially in high winds.
Scarlett Fireplaces have been relining chimneys with stainless steel liners for wood burning stoves since 1991. We insulate our flue liners every time, we support the liner throughout its entirety, and we will not install flue liners under 6 inch (150mm) in diameter serving a wood stove.
To determine the exact flue product needed for your chosen wood fired appliance, always check the manufacturers' recommendations or contact us for chimney liner advice.
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Call now to book your free on site quotation or pop in and see us at our Fireplace and Stove showroom at Unit 1A, Battlesbridge Harbour, Chelmsford Road, Rawreth, Wickford, Essex, SS11 8TD