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If bugs keep showing up on your walls and windows on warm winter days, you are not being re-invaded from outside — they have been living inside your walls since fall. Stink bugs, cluster flies, boxelder bugs, and Asian lady beetles overwinter in the structure and wake on mild days. New York Exterminating manages the indoor emergence and, more importantly, seals them out so it stops happening every year. The work is led by an Associate Certified Entomologist (ACE) licensed in structural pest control.
The first thing we do is calm the panic with a correct ID, because people often fear the worst. Overwintering pests appear at windows and on sunny walls in cool months: brown marmorated stink bugs (shield-shaped), cluster flies (sluggish and larger than house flies), boxelder bugs (black with red markings), and Asian lady beetles (orange domes). They do not bite, breed indoors, or harm the building. Bed bugs, by contrast, stay near where you sleep and leave bites; cockroaches hide in kitchens and baths and scatter from light. If your insects gather at windows on warm days and disappear when it turns cold again, they are overwintering invaders — a nuisance, not an infestation of biting pests. We will confirm from a photo at no charge.
These insects exploit the gaps every building has: siding and cladding seams, gaps around windows and utility lines, attic and soffit vents, and fascia and roofline openings — especially on warm, south- and west-facing walls that catch the afternoon sun. In attached homes and older construction with plenty of small openings, large numbers can tuck into the wall voids in fall and then trickle indoors all winter. Because the entry happens in late summer and fall, that is when the durable fix has to be done.
1. Identify & reassure. We confirm the species and rule out bed bugs or roaches so you know what you are actually dealing with.
2. Manage the emergence. We help you vacuum and reduce the indoor activity without spraying insects dead inside the walls.
3. Exclusion. We seal the cladding seams, vents, window gaps, and penetrations they use — the step that ends the cycle.
4. Timed fall treatment. A late-summer perimeter treatment of the sunny walls they gather on, before they move in for winter.
Related services: Pest-Proofing & Exclusion, Occasional Invader Control, and Pest Identification.
Yes — we identify the pest, find the entry points, and quote before any work.
Usually yes — email a clear photo and we can tell overwintering invaders from bed bugs or roaches.
Late summer to early fall, before they move into the walls for winter.
Because they never left — they overwintered. In fall, stink bugs, cluster flies, boxelder bugs, and Asian lady beetles slip into wall voids, attics, and window cavities to wait out the cold. A sunny, mild day fools them into thinking spring has arrived, so they become active and crawl toward the light, ending up on your interior walls and windows. They came from inside the structure, not from outdoors.
Overwintering pests do not bite, sting, breed indoors, or damage the structure — they are a nuisance, not a threat. Stink bugs release an odor when crushed, cluster flies leave specks on windows, and Asian lady beetles can stain surfaces. The real problem is the sheer numbers and the fact that they keep reappearing all winter from inside the walls.
Almost certainly not. Overwintering pests — brown marmorated stink bugs (shield-shaped), cluster flies (sluggish, larger than house flies), boxelder bugs (black with red lines), and lady beetles (orange domes) — appear at windows and on sunny walls in cool months. Bed bugs stay near beds and bite; roaches hide in kitchens and bathrooms and flee light. If your bugs gather at windows on warm days, they are overwintering invaders. Send a photo and we will confirm free.
Once they are overwintering in the voids, you cannot spray them out without creating a worse problem (dead insects in the walls attract other pests). The effective approach is to vacuum and manage the indoor emergence now, then do the real fix on the outside — sealing the entry points — before next fall so the next generation cannot get in.
Exclusion, done in late summer before they seek shelter. We seal the gaps they use — cladding and siding seams, around windows and utility penetrations, attic and soffit vents, and fascia gaps — and can apply a timed exterior treatment to the sunny walls they congregate on in fall. Sealing the building is what actually ends the yearly cycle.
Two windows. If they are emerging indoors now, we help you manage it and plan the exclusion. The most important work is in late summer to early fall (roughly August through October), before the insects move in for winter — that is when exclusion and a perimeter treatment stop them from ever getting inside.
New York Exterminating, Inc.
1115 E 13th St, Brooklyn, NY 11230
ACE-Certified · Licensed in Structural & Food-Establishment Pest Control · Serving all five boroughs
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Our expertise goes beyond simple extermination. Backed by certified specialists and proven methods, we combine science, precision, and care to deliver pest solutions that last. Every treatment is designed with your safety, comfort, and environment in mind.
Many of our clients have remained with us since 2010, demonstrating strong trust and long-term satisfaction.
Licensed by NYSDEC – Reg. #15140
Serving property managers, senior facilities, shelters, affordable-housing programs, and businesses across NYC since 2010 — many long-term clients trust our work.
Botanical/organic options, German-cockroach elimination and rodent-exclusion programs, full bilingual support (EN/ES), plus a client portal with reports, photos, and chemical logs for total transparency.
NYSDEC Registered — Reg. #15140 — with fully licensed technicians (Jorge Bedoya, Tomas Cusati, Jason Mendoza). We follow all regulations for safe, legal treatments.
Led by an Associate Certified Entomologist (Jorge Bedoya) and technicians trained in urban entomology, we use IPM and proven methods for lasting results.
From first inspection to final follow-up, our science-based process ensures every pest problem is solved with precision, safety, and lasting protection
Find quick answers to common questions about our services, safety practices, and customer support
Yes. We use eco-friendly and low-toxicity treatments designed to protect your family, pets, and the environment.
Yes. We offer bilingual services in English and Spanish to ensure clear communication and support for all our clients across New York City.
We proudly serve all five boroughs of New York City — Brooklyn, Queens, Manhattan, the Bronx, and Staten Island — as well as surrounding areas.
You can access all your service reports, invoices, and treatment details through our secure online Client Portal. Simply log in anytime to view records, photos, and chemical logs for full transparenc
We specialize in removing rodents, insects, raccoons, and other common pests, providing thorough inspections and effective solutions to keep your home or business pest-free.
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