Carpenter ants in wood framing — Barcelona, Catalonia
Carpenter ants don't eat wood — they excavate it to create nesting galleries, leaving behind smooth, clean tunnels and small piles of frass (sawdust-like debris). They're attracted to wood softened by moisture, so their presence usually signals a moisture problem somewhere in the structure — around leaking pipes, roof flashings, or window frames. A single mature colony can contain 10,000–50,000 workers, and satellite colonies throughout a house can cause significant structural damage over years. A pest control technician locates the parent nest (often outside the house in a dead tree or stump) and satellite colonies using visual inspection and sometimes acoustic detection, then treats with targeted baits or perimeter insecticide. Addressing the moisture source is essential to prevent re-infestation.
Who to call
For this problem in Barcelona, call a: Ongediertebestrijder
Vind een Ongediertebestrijder in BarcelonaSymptoms to look for
- Small piles of fine, sawdust-like frass beneath wooden beams or window sills
- Large black ants (6–13 mm) seen indoors, especially at night near kitchens or bathrooms
- Faint rustling or crackling sounds inside walls when the house is quiet
- Hollow sound when tapping on wood that should be solid
- Winged ants (swarmers) emerging from wall voids in spring
Spoeddienst in Barcelona
Emergency services in Barcelona respond within 30–75 minutes in the central districts (faster in l'Eixample and Gràcia, slower in the upper hillside neighbourhoods). Callout rates run €60–€150 plus €45–€80/hour including IVA — among the highest in Spain alongside Madrid. Confirm the contractor is a registered instal·lador autoritzat with the Generalitat before granting entry, especially for heritage-building work.