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Bees Behind Siding: How to Identify and Remove Them

Identify what is actually nesting before anything else — honey bees behind siding need a beekeeper, not a spray, and a sealed-in colony rots in the wall.

By Zakaria 5 min read Save to Pinterest — opens Pinterest in a new tab
A honey bee swarm clustered on a maple branch, with bees in flight all around it
Photo: T.Voekler, CC BY-SA 3.0, via Wikimedia Commons
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Before anything else: work out what it is. Honey bees behind siding need a beekeeper and a cutout; wasps need a different approach entirely; bumblebees need nothing at all. And sealing the hole while they are in there is the one action that turns a nuisance into a repair bill.

Identify it from a distance

Photograph one with zoom. Do not get close to the entrance.

What is in the wall
Honey beeBumblebeeYellowjacket / hornetCarpenter bee
LookFuzzy, amber-brown, bandedLarge, round, very fuzzySmooth, shiny, sharply markedBumblebee-like, shiny black abdomen
Size~½ in¾–1 in½–¾ in~1 in
FlightSteady, heavy trafficSlow, loud, few at a timeFast, direct, dartingHovering, territorial males
ColonyThousands, perennialA few hundred, annualHundreds to thousands, annualSolitary
EntryAny gap or crackAny gap, often low downAny gapA perfect round ½ in hole it drilled
AnswerBeekeeper cutoutWait until late summerDusk treatment, or wait for frostTreat galleries, plug, paint

Two quick tells: traffic volume — a honey bee colony has continuous heavy two-way traffic all day, while a bumblebee nest shows a handful of arrivals a minute. And coarse sawdust below a round hole means carpenter bee, every time.

The mistake to avoid

Do not seal an active entrance

This is the expensive one. Seal honey bees in and the colony dies, but the comb, brood and honey stay — and in a sun-facing wall they melt, ferment, soak into plaster and framing, and then draw ants, cockroaches, wax moths and rodents for years. Sealed-in wasps often chew through the interior wall and come out in the house. Seal only once the cavity is genuinely empty.

Honey bees: a cutout, not an extermination

An established colony is many pounds of honey and a substantial sheet of comb. The removal that works is a cutout: the siding is opened, comb and colony are removed, the cavity is cleaned of wax and residue, and then it is sealed.

  • Call a local beekeeping association first. Most maintain swarm and removal lists, and some will do a viable colony cheaply or free.
  • Not every “bee removal” service does cutouts — ask directly whether they remove the comb, because a service that only kills the colony leaves you the whole structural problem.
  • A trap-out (a one-way cone that lets bees leave but not return) is sometimes offered. It is slow, it does not remove the comb, and the abandoned honey still has to come out.

Why the cavity gets cleaned

Old comb and pheromone residue actively attract the next swarm. A cavity that has held bees before is the most likely place in your house to hold them again, which is why cleaning matters as much as removing.

Bumblebees: wait

A bumblebee nest holds a few hundred individuals, is finished by late summer, and is never reused. They are docile away from the entrance and are among the best pollinators in the garden.

Unless the entrance is right beside a door or a play area, doing nothing is the correct answer, and it costs nothing. In many countries bumblebees are also protected to some degree.

Wasps and hornets

Also annual — workers die at the first hard frosts and only mated queens survive, elsewhere. If the entrance is out of the way, waiting for autumn works.

If it is by a door, a walkway or a play area, or if anyone in the household is allergic:

  • Treat at dusk, when the colony is home and least active
  • Stand to the side of the entrance, never underneath it
  • Leave the hole open for several days afterwards, so returning foragers carry treatment in
  • Hire it out if the nest is above head height, inside a cavity you cannot see, or if anyone is allergic. This is the species that genuinely hurts people.

Carpenter bees

A different problem: they are drilling the siding itself, not using an existing gap.

A near-perfect half-inch round hole, coarse sawdust beneath it, and yellowish staining. They tunnel along the grain and return to the same timber year after year, extending the galleries — which is how a cosmetic hole becomes real damage over a decade.

  • Treat the galleries, then plug them once empty with dowel and exterior filler
  • Paint or varnish the wood. They strongly prefer bare or weathered softwood, and finished timber is far less attractive
  • The hovering bees at head height are males, which have no sting at all

Sealing up afterwards

Once the cavity is genuinely empty — after a cutout, or after the first hard frosts for an annual nest:

  • Exterior caulk backed by stainless steel wool in the entry point
  • Then walk the whole wall: behind gutters, soffit and fascia junctions, vents, utility penetrations, the ends of siding runs, and gaps where siding meets trim
  • Fine mesh over vents that must stay open

The gap they used is rarely the only one.

Step by step

Time
P2D
Cost
$0
You need
Exterior caulk and stainless steel wool, for sealing afterwards
Tools
Binoculars or a phone camera with zoom, Flashlight

  1. Identify the insect before touching anything

    Watch the entry hole from a safe distance and photograph an insect with zoom. Honey bees are fuzzy, amber-brown and banded, and traffic is constant and heavy. Bumblebees are large and very fuzzy with a small colony. Yellowjackets and hornets are smooth, shiny and sharply marked, and fly fast and directly. Carpenter bees look like bumblebees with a bare shiny black abdomen and leave a perfectly round half-inch hole. Which one it is changes everything that follows.

  2. Never seal the entrance while they are active

    This is the mistake that turns a nuisance into structural damage. Sealing honey bees in leaves comb, brood and honey to melt and ferment inside the wall, which stains through drywall, rots framing and draws ants, roaches, wax moths and rodents for years. Sealed-in wasps often chew through the interior wall instead and end up in the house.

  3. Call a beekeeper for honey bees

    Honey bees in a wall are a cutout, not an extermination — the siding is opened, the comb and colony removed, and the cavity cleaned and sealed. Many local beekeeping associations maintain swarm and removal lists, and some will do it free or cheaply for a viable colony. Killing a honey bee colony in a wall leaves the comb behind, which is the whole problem.

  4. Wait out bumblebees and a single-season wasp nest

    Bumblebee colonies die out by late summer and never reuse the site, and wasp and hornet nests are annual — the workers die at the first hard frosts and only mated queens overwinter elsewhere. If the entrance is not somewhere people pass closely, doing nothing until autumn is usually the right answer and costs nothing.

  5. Treat wasps at dusk, or hire it out

    If a yellowjacket nest is by a door, a play area or a walkway, treat it at dusk when the colony is home and least active, standing to the side of the entrance rather than beneath it, and leave the hole open for several days so returning foragers carry the treatment in. A nest above head height, inside a wall cavity you cannot see, or near anyone allergic is a job for a professional.

  6. Seal the cavity only once it is empty

    After removal, or after the first hard frosts for an annual nest, close the entry with exterior caulk backed by stainless steel wool, and check the rest of the wall for gaps — behind gutters, at soffit and fascia junctions, around vents, utility penetrations and the ends of siding runs. An unsealed cavity that held a colony is the one most likely to be chosen again.

Common questions

How do I get rid of bees behind my siding?

Identify them first, because the answer is completely different for each species. Honey bees need a beekeeper to do a cutout — opening the siding and removing the comb — not a spray. Bumblebees die out naturally by late summer and never reuse the site, so waiting is usually best. Yellowjackets and hornets can be treated at dusk or handled by a professional, and the nest dies at the first hard frosts anyway. Carpenter bees are drilling the wood itself and need the galleries treated and plugged.

Can I just seal the hole to keep bees out of the wall?

Not while they are active, and this is the most expensive mistake people make. Sealing in a honey bee colony leaves comb, brood and honey to melt and ferment inside the wall — it stains through drywall, rots framing, and attracts ants, cockroaches, wax moths and rodents for years afterwards. Sealed-in wasps frequently chew through the interior wall and come out inside the house instead. Seal only once the cavity is genuinely empty.

How do I know if they are honey bees or wasps?

Honey bees are fuzzy, amber-brown with darker bands, roughly half an inch long, and the traffic at the entrance is heavy and continuous through the day. Yellowjackets and hornets are smooth and shiny with sharp black and yellow or black and white markings, fly faster and more directly, and are far more aggressive near the nest. Bumblebees are large, round and very fuzzy with a colony of only a few hundred. Photograph one with zoom rather than getting close.

Are honey bees in a wall dangerous to the house?

Over time, yes, and mostly because of what they store rather than what they do. An established colony builds substantial comb and can hold many pounds of honey, which in a warm wall can melt and soak into the structure, staining plaster and rotting timber. The wax and residue then attract secondary pests. That is why removal is a cutout that takes the comb out, and why simply killing the colony makes the structural problem worse.

What are the round holes in my wooden siding?

Almost certainly carpenter bees. They bore a near-perfect half-inch round entrance into bare or weathered softwood, then tunnel along the grain, and they return to the same wood each year and extend the galleries — which is why damage compounds. You will often see coarse sawdust below the hole and yellowish staining. Treat the galleries, plug them once empty, and paint or varnish the wood, since they strongly prefer untreated timber.

Will the bees come back to the same wall next year?

Honey bees very often will, because old comb and pheromone residue left in a cavity actively attract new swarms — which is the main reason a proper cutout cleans the cavity rather than just removing the bees. Wasps and bumblebees do not reuse the previous year's nest, though they may pick the same wall if it offers the same easy access. Sealing every gap once the cavity is empty is what prevents the repeat.

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