Checking the chimney before you close on a house

What the home inspector looks at, and where the rules stop

Florida sets standards of practice for home inspections in the Florida Administrative Code, chapter 61-30. The general rule, 61-30.801, frames the inspection around readily accessible, installed systems and components, examined with normal operating controls and readily operable access panels, and it has the inspector recommend correction, monitoring or further evaluation of deficiencies they observe. The interior components rule, 61-30.807, lists fireplaces and solid fuel burning appliances, and vent systems, flues and chimneys, among the things inspected.

The same rule lists what the inspector is not required to do, and several items touch the fireplace directly. They are not required to inspect seals and gaskets on fireplaces, mantels and fireplace surrounds, or heat distribution assists. They are not required to determine draft characteristics, move fireplace inserts, stoves or firebox contents, or light gas fireplaces or unlit pilot lights. A good home inspector does what the rules ask and flags what they see, but the flue beyond the reach of a flashlight is left to a chimney-specific look.

What to check on a chimney before buying

The chimney standard, NFPA 211, asks for a closer and more complete check of a chimney whenever a property is sold or changes owners. The point is that a new owner is about to rely on a system whose history they do not know. That examination treats the chimney and fireplace as one system and follows the flue from the smoke chamber to the cap as far as access allows, instead of stopping at the parts visible from the room and the ground.

On the visit we check the firebox and hearth, the damper and its seat, the smoke chamber and shelf, the flue lining and its joints, the crown, the cap and the flashing up close, and the clearances between the chimney and the framing where the attic or chase allows. On a factory-built system, we find the rating plate, check the panels and the chimney sections against the listing, and look at the chase top. On a gas unit, we light it and check the burner, the glass seal and the vent. We go over the findings with you before leaving, and anything that needs work gets a written estimate.

Fitting it inside the inspection period

A purchase contract can give the buyer a fixed window for inspections, and the chimney check has to land inside it with time to spare for any follow-up. Book it as soon as the contract is signed, alongside the general inspection, not after it. Your agent can arrange access through the seller.

Ask the seller not to use the fireplace for a day or so before the visit, since a cold firebox and flue can be examined properly and a hot one cannot. Roof access matters too, so let us know about a steep roof, a tile roof or a two-story chimney when you book. If the flue is coated too heavily to see its walls, a sweep may be needed before the lining can be judged, and the seller's permission is needed for that.

Questions to ask the seller

The seller or the listing agent can fill in history that no inspection can see. Put these to them in writing.

• When was the chimney last swept or inspected, and are the invoices or notes available?
• What fuel has the fireplace burned, and how often has it been used?
• Has there ever been a chimney fire, a leak near the chimney, or animals in the flue?
• What chimney or fireplace repairs have been done, by whom, and is there a warranty that transfers?
• For a gas or factory-built unit, where are the manual and the model details?
• Was the fireplace, insert or gas unit added after the house was built, and was it permitted?

Reading the findings as a buyer

Our estimate sorts findings into what we found, what we would fix and what can be left for later, and a buyer should read it in the same order. Safety items come first, such as a cracked or missing flue liner, a gas appliance venting into an unlined masonry flue, gaps that let heat reach wood framing, or a damper plate that has fallen. Water entry items come next, such as a cracked crown, failed flashing or a missing cap, because water damage grows quietly.

Items marked as able to wait are the ordinary upkeep of any house with a chimney, such as a first sweep, minor repointing or surface staining with no active leak behind it. None of this tells you what to offer or whether to proceed. Price, credits and contract terms belong with your agent or attorney, but the written findings give them something specific to work with.

Paperwork for a prefab fireplace

Each factory-built fireplace is a listed appliance, tested to UL 127 and vented through a listed chimney, and each one is repaired only with parts that match its listing. The rating plate names the maker and the model, and the manual gives the clearances and the approved parts. If the plate is missing or the maker no longer supplies parts, repair options can be limited, and that is better learned before closing than after.

Look at the outside of the chase as well. A rusted or sagging chase cover, rust streaks down the siding, or stains around the top of the chase point to water getting in. Inside, cracked refractory panels, a warped firebox or a damper that will not operate are the items we look for first in a factory-built unit that comes with the house.

Gas fireplaces in a purchase

Because Florida's home inspection rules do not require the inspector to light a gas fireplace, a gas unit can pass through the general inspection without ever being run. We light it following its manual, watch the flame and the burner, check the glass and gasket on a direct-vent unit, look at the vent termination outside, and leak-test the connections at the appliance. On a vent-free unit, the manual's room-size limits and the oxygen depletion sensor are part of the check.

Ask whether the barrier screen for the glass is present, since units made from January 1, 2015 come with one when the glass runs hot. A missing barrier is an easy item to have the seller replace with the maker's part.

After closing

Keep the inspection findings and any repair invoices with the house records. They are the baseline for every yearly inspection that follows, and they will matter again when you sell. If repairs were left for after closing, book them before the first fire rather than after it, and use the estimate you already have as the scope.