Broad Ripple Raccoon Latrine - Why Roundworm Decon Is Not Optional
A February attic noise that turned into a contamination job. A 24-month-old latrine site with Baylisascaris risk, a female with four kits, and 18% of the attic that had to come out and be rebuilt.
Scratching in February. Trapping for three weeks. Nothing caught.
The homeowner called us in late February. He had been hearing heavy scratching above the master bedroom ceiling since mid-January. He had bought two hardware-store live traps, baited them with marshmallows and cat food, and set them in the attic for three weeks. He caught nothing. The scratching got louder.
His house was a 1925 American Foursquare two blocks off the Monon in Broad Ripple. Plaster walls, knob-and-tube remnants tucked into the attic corners, blown cellulose layered over the original cotton-batt insulation from probably the 1970s. He had owned the house for six years and had never been in the attic above the second floor. He was not sure anyone had been up there in a long time.
We told him to stop trapping. Three weeks of unsuccessful interior trapping in February usually means one of two things. Either he was hearing flying squirrels, which do not enter ground-level traps the way raccoons do, or he was hearing a female raccoon who had already given birth and was not going to leave her kits to chase a marshmallow. The team came out the next morning.
What we found in the attic
The entry was a gable vent on the south elevation where the original copper screen had rotted through. Claw marks on the cedar siding. Hair caught on a nail head. Standard raccoon entry, nothing surprising about it.
Inside the attic, the surprising part. There was an active raccoon den in the northwest corner - a hollowed-out depression in the insulation, kit scat fresh enough to still be soft, and the faint chittering of newborn kits when we got within eight feet. The homeowner had not been imagining things.
The bigger problem was on the south side of the attic, about 15 feet from the gable-vent entry. There was a latrine. Raccoons are tidy in a specific way - they pick a corner and use it consistently for months or years. This latrine was old. The scat had dried to a uniform gray-brown, layered, with the top inch crusted hard. We measured the contaminated zone at roughly 12 square feet of direct deposition, with another 30 square feet of insulation around it that had to be considered contaminated under the working assumption.
The reason that working assumption matters is Baylisascaris procyonis. It is the raccoon roundworm. The eggs are shed in raccoon feces, they become infective in soil or insulation after two to four weeks, and they remain viable for years - the CDC and academic sources put the survival window at multiple years under typical attic conditions. The eggs are sticky. They aerosolize when disturbed. Human infection is rare but the consequences when it happens are severe - the larvae migrate through tissue, including ocular and central nervous system tissue, and there is no clean treatment.
A 24-month-old latrine in an attic above a child's bedroom is not a job you cut corners on. We treated it like a contamination job because it was one.
The reunite-box protocol for the female and kits
The first job was to get the animals out without orphaning the kits, which is both an ethical issue and a practical one. An orphaned kit in an attic in February dies in the insulation and becomes a separate decomposition problem 10 days later.
The team used a reunite-box protocol. We hand-removed the four kits - eyes still closed, roughly three weeks old - and placed them in a heated reunite box mounted to the exterior of the house directly below the gable-vent entry. We installed a one-way door on the gable vent so the female could exit but not re-enter. At dusk she came out, found the reunite box on the wall below her old entry, retrieved her kits one at a time over about 90 minutes, and relocated them to a backup den site she had clearly already scouted. Raccoon mothers almost always have a backup. We confirmed zero activity at the entry for three consecutive nights and then permanently sealed the gable vent with copper screen backed by hardware cloth.
The reunite-box protocol is more humane than trapping the mother and trying to relocate her with kits, and it is more humane than leaving kits behind. It is the right answer almost every time you find a raccoon family in February or March.
Why 18% of the attic had to come out
Once the animals were out, the real work started. We treated the attic as a confirmed roundworm site. Full PPE - Tyvek suits, P100 respirators, nitrile under leather gloves, taped wrist and ankle seals, dedicated boot covers. We do not vacuum a latrine without that gear, and we do not let the homeowner in the attic until the decon is finished.
The 12-square-foot direct deposition zone came out in chunks. We bagged the dried scat and the directly contaminated insulation into double 6-mil contractor bags and labeled them for landfill disposal under the appropriate waste category. The 30-square-foot buffer zone around it also came out, because the egg viability and aerosolization risk made the buffer non-negotiable.
Then we worked outward. The attic was roughly 1,400 square feet of usable insulation surface. We ended up removing and replacing 18% of it - about 250 square feet - to get a clean margin in every direction around the latrine and the den site. The decking under the deposition zone was treated with a residual peroxide-based decontaminant rated for roundworm egg deactivation, allowed to dwell for the full label time, and then encapsulated with a sealing primer before new insulation went down.
The new insulation was R-49 blown cellulose, which matched what was there and brought that section up to current Indiana code. The original cotton batting from the 1970s in the un-contaminated zones we left alone, with a note in the report that the homeowner should consider a full attic refresh in the next five to seven years for energy reasons unrelated to wildlife.
What it cost, what insurance covered
Total project: $4,150. Roughly $475 for the removal work itself including the reunite-box protocol and the entry seal. The remediation - PPE, contaminated material removal and disposal, decontaminant, primer, 250 square feet of new R-49 cellulose, and the additional labor for working in PPE - came to $3,675.
The homeowner filed a claim under his standard homeowner's policy. We provided photo documentation, the species ID, the latrine measurement, the contamination zone diagram, and a written remediation report on our letterhead. His carrier covered 60% of the remediation portion, which worked out to about $2,200 back to him after his deductible. Coverage for wildlife remediation varies widely by carrier and policy - some policies exclude all wildlife damage, some cover only structural, some cover full remediation when contamination is documented. The documentation is what makes the claim viable. We write the report assuming it will be read by an adjuster.
The note from the homeowner, six months later
He emailed us in August. His daughter had started kindergarten and they had hosted a back-to-school party with seven kids in the upstairs playroom directly below the old latrine site. He said he would not have let those kids near that floor of the house if we had not done the full decon. He thanked us for not talking him into a cheaper version of the job.
That email is the reason we treated it like a contamination job. Because it was one. And because somebody is going to play on the floor under that ceiling.
Scratching above the bedroom? Do not start trapping yourself.
Hardware-store traps almost never catch a female raccoon with kits, and old attic accumulations carry health risks the homeowner cannot evaluate from a step-ladder. The team inspects, identifies, and tells you what you actually have.
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