Any single skin flue pipe used must not come closer to combustibles
than three times its diameter e.g for a 6"or 150mm
pipe it needs to be a minimum of 18" 450mm from a combustible
material. This distance can be reduced to 60mm if our double
skin insulated flues are used.
installing a twinwall double insulated chimney system you
need to ensure that the chimney height is compliant with
the building regulations.
is a guide to the clearances you must have in order to comply.
Flue must clear the roof by the distances laid out below
to ensure that you receive a good draw on the chimney. Flue
gases must be able to flow from the chimney freely in order
not to cause any risks to the property.
that does not have the height laid out below could suffer
from a downdraught problem resulting in the flue gases not
escaping freely and causing problems.
When measuring the height of the chimney you MUST NOT measure
the chimney at the top of the Rain cap you always measure
from the area where the flue gases depart. See the image
below for an example.