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Existing chimneys & flexible chimney liner

doc j

Lining existing chimneys - in Document J, page 23 & 24

Stove building regs pages:
Stove building regulations intro
Notice plates
CO Alarm
Installation and Building Control
Stove hearth sizes
Flue outlet heights
Flue sizes
Ventilation for stoves
Flue pipe - distance to combustibles and heat shielding
Flue pipe - recommended length
Twin wall flue - boxing in
Changing from single skin flue to twin wall at a ceiling
Lining existing chimneys
New chimneys

Lining existing chimneys

Flexible chimney liner may only be used to reline existing chimneys, not for new chimneys. The chimney liner must be suitable for the application and the manufacturer's fitting instructions must be followed.
Chimney liner must be installed in one continuous length with no joints within the chimney.
Do not use coring balls on any metal flue system.
We would recommend using appropriate sweeping brushes to ensure that the chimney is not blocked by chimney deposits.

Insulating the liner is not specifically mentioned in Doc J but is a very good idea.

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