Bees in the Wall: Concrete Block and Wood-Frame Removal in Miami

Signs a colony has moved into the wall

• Bees flying straight into a hairline crack in the stucco, a gap beside a window frame, or the joint where the wall meets the slab.
• A low hum you can hear through the drywall when the house is quiet, loudest at one patch of the wall.
• Bees crawling out around an outlet cover, a light switch plate or the top edge of a baseboard indoors.
• A tan or brown stain, sometimes tacky, creeping across the interior paint, or a section of wall that feels warm.
• A handful of dead or groggy bees on the same windowsill each morning.
• Traffic at the hole that grows from week to week instead of a cluster that leaves after a day or two.

What is going on behind it

A scout found a dark, dry, protected void and the swarm followed it in. Standard concrete blocks are cast with hollow cores, and when the blocks are stacked those cores line up into tall connected shafts, so comb can hang in one cell or spread into the next where a web or mortar joint is broken. Cells that carry steel bars are filled solid with grout, which leaves the bees the open ones. In a frame wall the colony fills a stud bay, sometimes pushing through insulation. Workers keep the brood nest near 93 to 95 degrees, and that steady warmth is what a thermal camera picks up. Once wax is drawn and honey stored, the bees treat the wall as home and rarely leave on their own.

Block cells and stud bays open differently

Where the comb sits decides which side of the wall gets opened. In a block wall the colony may be inside the cores of the block, or, where the furring space behind the interior drywall is deep enough, in that gap between block and board. Comb in the cores is usually reached from outside: the stucco is scored and lifted, and a small window is cut through the face shell of one or two blocks, never through a grouted, steel-filled cell. Comb behind the furring is reached from inside by removing a panel of drywall, which is cheaper to put back than stucco.

Wood-frame walls are simpler to read. The bees fill the space between two studs, so the opening runs up and down that one bay. Inside, that means a rectangle of drywall; outside, it can mean siding boards or stucco on lath. If the comb climbs toward the roofline, the job can overlap with a soffit or eave hive and both are planned together.

Leftover comb ruins a wall from inside

Evicting the colony solves the stinging; it does not solve the wall. University of Florida extension guidance is blunt about what happens to comb left in a wall: the honey ferments, abandoned brood decays into a sour odor, scavengers such as wax moths and small hive beetles take over, and melted wax can soak into the wall and stain it so badly that paint and wallpaper will not hold. Once the colony is gone, nothing fans the comb to keep it cool, so wax in a sun-baked wall can soften and slump.

Old comb also carries the scent of a past colony, which is one reason an emptied cavity can draw a new swarm later. The guide on returning bees explains the pull of an old nest site. A wall job is not finished until the cavity is scraped clean, wiped down and sealed; the scrape-out of wax and honey page covers that step.

Pinpointing the nest before anyone cuts

A wall should be opened once, in the right place. Comb often hangs from the top of the void, well away from the entrance, so the crack the bees use tells you little about where the wax sits. A thermal camera shows the warm outline of the brood nest through stucco or drywall, so the opening can be marked on the surface before a blade touches it. Listening at the wall and a tiny probe hole with a stiff wire confirm the edges when the image is faint.

That precision is what keeps repair costs down: a tight opening means less stucco to rebuild and less paint to blend. If you want to understand what the camera actually shows, see what thermal imaging reveals about a hive.

When the wall is not yours alone

In a townhouse row or a condo building, the exterior block often belongs to the association, and the interior drywall belongs to you. The association's manager or board can receive a COI ahead of the work, and an itemized invoice can show each party its share. Tenants and owners can sort out who calls first with our guide for renters and landlords, and buyers who spot activity during a walkthrough can start with bees found during an inspection. Larger buildings are covered on the condo and high-rise page.

How a wall colony comes out

1. Scan and mark

   The thermal camera traces the warm comb, and the outline is drawn on the wall in pencil or tape so the cut matches the nest and nothing more.

2. Protect the room

   Furniture is moved, floors and vents are covered in plastic, and the inside of the room is sealed off so loose bees cannot drift into the rest of the house.

3. Open a measured window

   Drywall is cut along the marked lines, or stucco is scored and the block face shell removed, leaving grouted structural cells untouched.

4. Vacuum workers, frame the brood

   Gentle suction draws the adult bees off the exposed wax into a ventilated box. Brood comb is then cut out in whole pieces and tied into wooden frames, so the young survive the trip to the receiving beekeeper.

5. Clean, seal, close

   Remaining wax and honey are scraped out, the cavity is wiped and packed or screened, the entry gap is sealed, and the opening is closed for refinishing.

What we put back afterward

The opening is put back by our own licensed contractors and painters. On block, the face shell is patched, new stucco is floated to match the old texture, and the wall is primed and painted. Inside, drywall is fitted, taped, finished and painted to the edge of the nearest corner so the patch disappears. The old entry gap is sealed with the cavity behind it. Should a colony ever take up residence again in a cavity we closed, the workmanship warranty brings us back out to handle it. If your insurer or board wants a record, request photos of the exposed comb and an itemized bill. The repairs page lists what our crews rebuild.

Where wall colonies turn up across Miami-Dade

• Coral Gables

  Merrick's 1920s city is almost entirely Mediterranean Revival, and its name comes from his family's house of Miami limestone, the stone locals call coral rock. The city adopted its first preservation ordinance in 1973, so ask the city whether an exterior patch on a historic house needs approval before the wall is closed.

• Miami Springs

  Curtiss and Bright laid out this city in the 1920s land boom, and its signature look is Pueblo Revival: flat roofs, irregular parapets and stuccoed walls standing in for adobe. A parapet is simply a short wall rising above the roof, and if it is built of block its open cells can hold a colony like any other wall.

• Coconut Grove

  Not every Grove house is block. The neighborhood keeps pioneer-era buildings, including The Barnacle, built in 1891 and raised on wood pilings. In older frame houses a colony fills the bays between studs, and opening from the inside can spare the original siding.

• Homestead

  Hurricane Andrew came ashore just northeast of the city in 1992, and the whole county falls within the high-velocity hurricane zone set out in the state building code. Reinforced block walls are the reason only open, ungrouted cells are ever cut.

Questions people ask us

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