Question on construction
I have seen a few posts on chimneys recently in this group.
What is the general rule on chimneys in terms of height ?
How much higher than the roof do they have to be ?
Can they be in line with the roof ?
Is there a law on this ? especially in N. California ?
And a bloody good basic rule, too -- not one of those desk-generated
jobs, that one.
(It's odd how homeowners who want to build fires sometimes want to
minimise the uncomfortable fact that fires and chimneys are.....hot.
go figure, 'n' all that.)
Architectural and topographical historian
What sort of chimney? Different rules can apply.
The International Residential Code requires a chimney height above the
roof plane penetration of three feet, and the top must be two feet
higher than any roof surface within ten feet (measured horizontally,
not along the roof line). I'm not sure if your area uses the UBC or
the IRC so call your local building department for verification.
If you're talking about a prefab metal chimney follow the
manufacturer's sizing charts for flue sizing. If you're planning a
masonry chimney and fireplace follow the guidelines for flue size,
firebox and throat dimensions to insure an efficient draft.
BTW, there's a two question limit to newbie posting. Your post had
_five_ ? marks. That's far over the limit. Normally there'd be stiff
penalties, but hey, I'm on Grand Jury duty this month and I'm feeling
magnanimous. No fine this time, but you'll have to offer three answers
to correct the imbalance.
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