Pre-Purchase Chimney Inspection: What a General Home Inspection Does Not Cover
A standard home inspection looks at the fireplace from the room. The defects that cost the most are above the damper and inside the flue, and they need a different scope.
A general home inspection is broad by design and its fireplace section is necessarily shallow — typically a visual check from the hearth and the roofline. The expensive defects in a chimney are not visible from either position.
01What the general inspection can and cannot see
It can see the firebox face, whether the damper operates, and the exterior of the stack from ground or roof. That is a reasonable scope for a generalist and it catches obvious problems.
It cannot see the flue interior, the smoke chamber above the damper, the concealed passage through framing, or the condition of the liner. Those require an internal scan and access to concealed areas — a different level of inspection with different equipment.
02The findings that justify the separate scope
A breached or missing liner, which takes the flue out of service until corrected and is among the larger single repair items on a house. A cracked crown, where water has been entering the masonry for years. Failed flashing, with the damage now inside the roof structure rather than on it.
Any one of these materially changes what the property costs to own, and none of them appear in a visual check from the room.
03Why the timing is the whole point
Before closing, a documented finding is a negotiating position or a condition of sale. After closing it is your bill. That is the entire economic argument for the separate inspection and it is a strong one relative to its cost.
It also establishes a baseline. A dated report with photographs is what lets you demonstrate, later, what the condition was when you took it on.
04What to ask for specifically
An inspection that includes an internal camera examination of the flue and access to concealed areas — the deeper level, not the routine visual one — and a written report with photographs and a stated verdict per component.
If a seller has recently had the chimney 'checked', ask for that report. A verbal assurance that it was looked at is not a finding you can rely on.
Commission the deeper inspection separately and before closing, ask explicitly for the internal flue scan, and keep the photographed report. It is the cheapest point at which any of these findings will ever be dealt with.
Every recommendation here starts from one place: a graded, photographed chimney inspection done to one standard, with a paper trail you keep.
The Chimney Standard Team
This article was written and reviewed by the CSIA-certified crew at Chimney Standard. Every recommendation reflects NFPA 211 and CSIA trade standards and the same documented, photographed approach we hold every job to.
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