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can give you good advice on the suitability of an existing
chimney.
Masonry chimneys should be checked for deterioration
including damaged bricks, crumbling and missing mortar,
cracks in the drip cap at the top of the chimney, and loose
ashings at the roof line. The liner should be checked for
cracks and mis-alignment. It must be at least 6" in size.
An existing factory-built metal chimney needs a careful
inspection. Your new cookstove should be connected only
to factory-built chimneys approved to ULC Standard S629
in Canada and UL 103HT in the U.S. Possible problems
with an older metal chimney can include a warped or buckled
liner caused by the heat of a chimney re, corrosion of the
outer shell, a loose ashing, and a lack of proper support.
Any discolouration of the metal shell near a joint indicates
that the insulation has settled. A damaged metal chimney
should be replaced with a new approved chimney which will
be safer and will perform better.
Safety Practices
What To Do If You Have a Chimney Fire
1) Close all the combustion air dampers on the appliance.
2) Call the re department immediately.
3) Be prepared to get everyone out of the house in case the
re spreads
4) Go outside and check to see that hot ashes do not ignite
shingles.
5) Watch anything near the chimney that could catch re and
burn.
6) After the re has run its course and the chimney has cooled,
have the chimney thoroughly inspected to determine
if it sustained any damage.
7) Resolve to inspect and clean the chimney more often to
prevent another chimney re.