When the Mold Comes Back

Wednesday, October 28th, 2026 — The kitchen had been finished since April. New drywall, new paint, a paid invoice, a clearance letter in the file. In October the homeowner pulled the toe-kick off to find a lost screwdriver and photographed a dark line on the new board, right where the old one had been. She sent the photo to the same desk. The claim number she wrote in the subject line was the old one. The remediator she copied on the email was the company the carrier had paid in March, and that company's warranty, if anyone had read it, ran one year on workmanship and said nothing about a pipe nobody replaced.

A returned stain is a cause question before it is a supplement or a new claim. Four causes show up over and over, and each one points at a different checkbook: the carrier's remaining fungi limit, a new occurrence under the policy, the contractor who closed the wall, or nobody, because the owner has been living with a leak the first file never fixed. The adjuster's work is to tell those apart before anyone starts tearing out the kitchen again.

Is it the same water?

Open the wall. The photo of the toe-kick is not enough, and a telephone supplement based on it will be wrong in one direction or the other.

Look at the supply line, the drain, the dishwasher hose, and the valve that were the source in March. If the same fitting is still damp, still corroded, or was never replaced, the water that fed the first colony is still feeding this one. The October stain is the old loss, unfinished. The policy owes what the original estimate owed and did not complete, for example a trap that was on the scope and never installed. It does not owe a second full remediation because the first one was painted over while the leak continued. Pay to stop the leak if stopping it was always part of the covered repair. Then decide, with a meter and a look at the new paper, how much of the new growth is the consequence of leaving that leak in place.

If the old source is dry and a different fitting is wet, you have a new occurrence. A supply line that fails in October is not the dishwasher hose that failed in March. New date of loss, new deductible, new cause. The fact that the kitchen was already remodeled does not merge the two. Note the old claim number in the new file so the next person does not pay the April invoice again.

If nothing is wet, the meter is dry, and the spot is on the face of new paint with no path from a pipe, slow down. Paint bleed, a shadow from the old stain telegraphing through a thin coat, and dirt in a toe-kick void all get reported as "it's back." A tape lift settles whether the spot is growth. The earlier article on sampling is the short version: test the stain you can see, and do not order a whole-house cassette because a homeowner is frightened by a line on a board.

Was the wall closed wet?

This is the cause that makes everyone look bad, and it is the one the first file can already answer if the first adjuster did the job.

New drywall with growth on the back, insulation that is still damp, and a stud that reads wet at the bottom, months after the invoice, means the cavity was closed before it was dry. Sometimes the remediator closed it. Sometimes the homeowner hired a painter who closed it over a drying set that had not finished. Sometimes a second contractor, the one who hung the cabinets, did it over a weekend. The IICRC mold standard, S520, treats removal and drying as the work, and a clearance that happens after the board is already on is not a clearance of the cavity.

Ask for three things from the original file before you argue about whose fault that was. Moisture readings on the framing the day the board went back on, with the date and the meter. Photographs of the open cavity after the wet material came out. The clearance report, and whether it was visual, a meter, or an air sample taken in the room after the paint was on. If those items are in the file and they show dry wood, the new growth needs a new source of water. If they are missing, you cannot prove the cavity was dry, and you also cannot prove the contractor failed. Say which one is true. Do not paper over a missing reading with a denial, and do not paper over it with a second payment, until you have looked.

Those three items are the close-out on every mold file you want to be able to reopen. A clearance letter that says "passed" and nothing else will not help you in October.

Whose invoice is the second tear-out?

Match the cause to the payor, and write the match down so the homeowner hears one answer.

• The original leak was never repaired, and it was on the covered scope. The carrier finishes the original repair. One occurrence, no new deductible. The extra tear-out of board that would not have been ruined if the leak had been fixed is part of that occurrence only to the extent your form's mitigation and ensuing-loss wording supports it. If the owner refused access or hired someone who closed the wall against the remediator's advice, document that. It limits what the second tear-out is worth.

• A new leak. New claim. The fungi limit applies again only if it is a per-occurrence limit or the aggregate is not used up. Read it before you promise the kitchen a second time.

• The contractor closed a wet wall, or the clearance was of the wrong room. That is workmanship. The carrier paid for a service that did not do what the protocol required. The recovery, if there is one, is against the contractor, and the owner's first stop is the warranty they were given. You can help them by sending the readings, the photos, and the invoice. You are not their lawyer, and a reservation that you are looking at the contractor's work is not a promise that the carrier will pay again and sort it out later.

• No moisture and no growth. No payment. Explain the tape lift in one sentence. Offer nothing "to keep the peace." A goodwill tear-out on a dry wall becomes the standard for the next call.

What is left of the fungi limit?

On many homeowners forms the fungi give-back is an aggregate for the policy period, not a fresh amount every time a stain appears. The March payment may have used $8,400 of a $10,000 limit. October then has $1,600, even if you conclude the new growth is part of a covered cause. If March used all $10,000, a supplement for more fungi dollars on that occurrence is a limit problem, not a scope problem. A genuinely new occurrence does not refill an aggregate that the form says is once per policy period. Read the endorsement. Some are per occurrence. Some are per period. The declarations page has the number, and the form has the rule for how often it resets.

Do the arithmetic in the letter. "Fungi limit $10,000 for the policy period beginning January 15. Paid on the March 2 loss: $8,400. Remaining: $1,600." An owner who hears "we already paid for mold" thinks you are done with them. An owner who sees the remaining dollars can decide whether a second protocol priced at $6,000 is something they want to authorize above the limit.

Water damage that is not fungi still sits outside that cap, on a covered cause of loss. A new pipe break in October pays the plumber and the wet, uncolonized materials under Coverage A even when the fungi aggregate is exhausted. Do not let an exhausted mold limit become a reason to deny a new plumbing claim. Split the invoice the same way the sublimit article describes.

Reopen, or new date of loss?

Reopen the March file when the facts are still March's facts. The leak that was in the original scope and was not completed. The cavity that the original contractor closed wet. A missed room that was wet in March and never opened. The deductible stays the one already taken. The fungi payments already made count against the limit. Your notes should say "reopened," with the reason, so a second check does not look like a second claim to the person reconciling the period.

Open a new claim when the cause is new. New fitting, new date, new water. Take the deductible the policy calls for on a separate occurrence. Do not "fold it into the old file" because the kitchen looks the same. Folding it in underpays the deductible the form requires, or it overpays fungi dollars that belonged to a limit already spent, depending on which mistake you make. Separate files with a cross-reference are easier to explain in a complaint than one file with two storms of water and one silent deductible.

If you cannot tell yet, say so, and inspect. "We have reopened the inspection, not the payment" is a legitimate status. Leaving the old claim closed and the new one unopened, while the owner waits, is how a small stain becomes a department of insurance call.

The contractor and the recovery you should not spend

A one-year workmanship warranty is a contract between the owner and the remediator. It is not coverage. If the warranty applies, the owner should make the claim on it in writing, inside the warranty period, and you should keep a copy. If the carrier paid the remediator directly, the carrier may have its own claim for work that did not meet the standard. That is a subrogation question. Preserve it. Do not write the contractor a release in exchange for a discount on the second visit, and do not tell the owner to sign one.

Keep the second protocol from being handed to the same crew with a blank check while the cause is still open. A contractor asked to judge their own March work in October will find a new cause of loss every time. If the relationship is already adversarial, use a different firm for the inspection, or go yourself with a meter and a hygienist who did not write the first clearance. Pay for that look. It is cheaper than a second kitchen.

This is as far as the claim file needs to go. Demand letters, suit deadlines, and how a recovery is split are someone else's docket. Your piece is the readings, the photos, the invoice, the warranty, and a note that says you did not release anyone.

The letter

Send one letter, not a status of "looking into it" stretched over a month. The owner has a kitchen they just finished paying to rebuild, and they are reading the stain as proof the whole claim was wasted.

We reopened the inspection of the March 2 kitchen loss after your October 12 photos. The original dishwasher supply was replaced and is dry. The cold-water valve under the left sink is wet at the packing nut, and the new drywall behind that cabinet is damp and spotted. That valve was not part of the March repair. We have opened a separate claim for the valve leak, with a date of loss of October 12. The fungi coverage on your policy is an aggregate of $10,000 for the policy period, of which $8,400 was paid in March, leaving $1,600. We will apply that remainder only to colonized material from the new leak. Drying and the plumbing repair are covered apart from that limit. Please do not close the wall until we have readings on the studs.

Rewrite the middle to match the cause you found. If the March contractor closed the wall wet, this is not the letter. The letter in that case tells the owner what you found, encloses the readings you do have, and tells them to notify the contractor in writing under the warranty, with a copy to you. Do not announce that the carrier will pay for the second tear-out "and pursue the contractor later" unless someone with authority to spend that money has said so.

The file you want, the next time a toe-kick comes off, is the one you can reopen in an hour. Dry readings dated the day the board went on. A photograph of the empty cavity. A clearance that says what was tested and where. Without those, October is a second argument. With them, it is a valve, a limit, and a letter.