In Castelldefels we look at the garden first: posts, decking and wooden fencing that touch the ground. Then, listening with audiotermes inside the home and a bait system designed for the plot and for the house.
Visual assessment visit included, at no cost and with no obligation. The technical study with audiotermes, which confirms every point of damage, is quoted separately and you decide with the figure in front of you. We work Monday to Saturday.
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The garden of a detached house in Castelldefels can sustain a colony of subterranean termites all year round. Watering the lawn keeps a sandy soil damp where the galleries advance quickly, and the pergolas, decking and fences that touch the ground put the food right next to the water. The activity points are located with audiotermes and the bait system is spread between the inside of the home and a perimeter ring on the plot.
A lawn in the beach area is watered almost daily because the sandy soil of the Llobregat delta does not hold water. That habit turns the edge of the plot into a strip of permanent damp, which is exactly the condition a subterranean termite colony needs to dig and stay active. In a detached house in Castelldefels the drought never reaches the garden, and the insect makes better use of that regularity than any other inhabitant of the plot.
The outdoor wood on those plots is almost always in contact with the soil: fence posts driven into the ground, sleepers edging the flower beds, sheds resting on timber bearers, the boarding around the pool. Each piece is a stage on the route. The colony first consumes what it finds at ground level and carries on towards the porch, the facade joinery or the sub-frame of the sliding door, which already belong to the home. Separating wood from soil, even by a few centimetres, cuts that route.
The blocks in the centre play with different pieces: there is no plot, but there is parquet, skirting boards and sub-frames, and the subterranean termite knows how to reach them too. It moves inside the walls and along the service ducts, so the activity can show up on a middle floor without anyone having seen a single insect. In those flats the inspection goes over skirtings, parquet joints and hollow partitions, and the audiotermes confirms whether there are workers busy behind them.
Montemar presents another scenario: hillside homes, with wooden porches and terraces raised on pillars to cope with the slope, and the Garraf pine forest wrapping around the plots. The woodland offers the colony stumps, roots and plant debris as a permanent larder, and any piece of wood that comes down to the ground connects that larder with the house. That is why the porches of Montemar are checked from the side facing the ground, which is where the activity settles first.
Zone by zone, what was built, what wood sits inside and where the insect gets in. It is the reading our technicians make before deciding where the check starts.
| Zone of Castelldefels | Dominant construction | Wood present | Way in | First sign |
|---|---|---|---|---|
| the centre | Blocks of flats and terraced houses | Parquet, skirting boards and door sub-frames | Party walls and service ducts | Blistered paint over the sub-frame |
| the beach area | Detached and terraced houses with garden plots | Pergolas, decking and wooden fences | Wood driven into watered soil | Fence post soft at its base |
| Montemar | Hillside homes among pine trees | Porches and terraces on pillars | Supports that go down to the ground | Mud tubes climbing up a pillar |
Source: ERRADICAT technical criteria from own work in the province of Barcelona · retrieved on 4 September 2026.
You do not need to see an insect. These three are what we actually find when we reach a home, and all three can be checked without tools.
Mud tubes the width of a pencil climbing the wall, the skirting board or the inside of a wardrobe. They are the tunnel the subterranean termite builds to shield itself from light and dry air. If they are damp inside, there is activity right now.
In spring the colony releases winged reproducers. They fly little, shed their wings quickly and pile up on a window sill or by a terrace door. Finding wings indoors means a mature colony nearby.
The termite eats the inside and spares a thin surface layer, so the element looks intact. Tap it with your knuckles and the sound changes from solid to hollow. On flooring it feels like a board that gives underfoot.
In Castelldefels spring uncovers the swarming flights: after a mild day with humid air, the loose wings turn up on the decking, on the drip sill of a window or floating in the pool.
Subterranean termite Reticulitermes spp.
Activity: from March to June · Peak: April and May.
Drywood termite Kalotermes flavicollis
Activity: from August to October · Peak: September.
These dates are indicative windows. Flight depends on temperature and humidity, so each year it starts earlier or later: if you see winged insects outside these months, it is still a reason for an inspection.
Source: Technical literature of the timber sector · retrieved on 21 July 2026.
We start by listening. The audiotermes amplifies the sound inside the wood and locates activity without lifting the floor or drilling anything, and from that comes a floor plan of the property with every point of damage marked.
Then the stations go in. We place indoor bait stations over the located sources and outdoor bait stations spread around the building's perimeter, loaded with bait for subterranean termites, a TP8-type biocide. The perimeter barrier is the part most providers skip, and it is the one that reaches the whole colony.
From there it is a matter of checks: every station is monitored, the bait replenished and the activity recorded until the nest stops responding. There is no shortcut, and anyone promising eradication in one visit is not talking about subterranean termites.
We publish the real timescales because they pre-qualify better than any promise. If someone wants a fix in one afternoon, better they know before calling.
Total duration:Checks every 6 to 8 weeks until the colony is confirmed to have stopped feeding
Included
A walk through the property with the naked eye to see what there is and how far it goes. The assessment visit is included, at no cost and with no obligation, and it is the starting point when the signs are unclear.
1 working day, with the figure agreed first
Percussion sounding, listening with audiotermes, species identification and location of the access routes from the ground. We always recommend it: it confirms every point of damage and decides where each bait station must go. It is quoted separately, so you see it with the scope in front of you and it starts when you say yes.
A few days later
Floor-by-floor plan of the property with the issues found, the extent of the damage and the treatment proposal with your written quote. It is part of the technical study.
1 working day
Placement of the indoor bait stations over the sources and of the outdoor perimeter barrier around the building.
Every 6 to 8 weeks
Check of every station, bait replenishment and activity record. The frequency adjusts to what the system shows.
6 to 12 months
The timescale depends on the size of the colony. It is the real range of the bait system and it cannot be compressed.
3 years
Three years from eradication, with the annual inspection included at no cost.
The visual assessment visit is included, at no cost and with no obligation: when the signs are unclear, it is the way to clear doubts. Even so, we always recommend the technical study with audiotermes, a floor plan of the issues found and a report, which is quoted separately: it confirms every point of damage, fixes where the treatment must act and from it comes your written quote, so you decide with the figure in front of you.
Source: ERRADICAT's intervention protocol · retrieved on 4 September 2026.
No, watering does not draw the colony in from afar, but in Castelldefels it does give it what it needs to settle: a strip of permanently damp soil on sandy ground that is easy to dig. The answer is not to let the garden dry out, but to separate the wood from the watered soil and keep watch on the points where that contact is unavoidable. That is exactly where the ring of perimeter stations works, turning the edge of the plot into a control point.
Yes: in the centre of Castelldefels the colony lives in the ground and reaches the blocks through the walls and the service ducts, without setting foot on any plot. The parquet, the skirting boards and the sub-frames are food enough for it. Recent work in the Baix Llobregat confirms it: a flat can require a complete system of indoor control points. Faced with a floor that changes sound when you walk on it or paint that blisters, a listen with audiotermes settles the doubt.
Yes, the surroundings add to it: the pine forest around Montemar holds stumps, roots and fallen wood that feed colonies naturally. That does not doom the homes on the hillside, but it does mean keeping watch on the porches and terraces on pillars, specifically the side facing the ground, because they are the bridge between the woodland and the house. A check of those supports with audiotermes clarifies whether the woodland has come too close to the house.
Yes, quite possibly: in the beach area of Castelldefels the pool works as an unintended trap and makes visible the swarming flight that the garden hides. The wings speak of a mature colony nearby, not necessarily inside the house. The sensible move is to check the wood on the plot that touches the soil, look at the pergola and decking supports and confirm with audiotermes whether the activity has entered the home or is still in the ground.
Yes: the system works on its own once installed, even in a Castelldefels house that stays shut for months. The stations remain available to the colony with nobody at home, and the technicians concentrate the checks in the periods with access, coordinated with the owners. The termite guarantee, 3 years in writing from the certificate of colony elimination, makes no distinction between a main home and a second home.
In Castelldefels we cover the whole municipal area, including the centre, the beach area and Montemar, and we also reach Gavà, Viladecans and Sitges. We work Monday to Saturday, 7:30 to 22:00.
Castelldefels shares the flat land of the delta with Sant Boi de Llobregat, where the bait station system of a home in the town centre is already installed and invoiced, with its programme of checks under way.
Termite treatment in Sant Boi de LlobregatCastelldefels touches the Garraf massif at Montemar, and on the other slope lies Sitges, where the challenge is to preserve the historic joinery of the indiano houses while the colony is eradicated.
Termite treatment in Sitges: the original joinery staysCastelldefels falls within the scope of the Barcelona page, which covers houses across the whole province and gathers the reference metropolitan work.
Getting rid of termites in the houses of Barcelona provinceEach municipality has its own page, with real work from its area and the detail of how we work there.
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The ROESP is the Spanish official register of pesticide establishments and services. It is the legal requirement for applying professional-use biocides, and not everyone offering these treatments meets it.
The technician who signs the reports, Sergi Casadevall Casas, has been treating termites and woodworm in Barcelona and Girona since November 2011, holding the biocide applicator licence. Visits are always made by our technicians, never by salespeople.
The conditions and timescales go in the intervention report, signed. For termites, 3 years from the certificate of colony elimination, with the annual inspection included at no added cost.
The technical study ends in a floor-by-floor plan of the property, with the issues found marked and the real extent of the damage. It is quoted separately and the document stays in the owner's hands, to work with the architect or to seek a second opinion with data on the table.
Spanish Royal Decree 830/2010 establishes that a pest-control company's registration in one autonomous community is valid to work in the rest. That is why we cover both provinces with the same registration and the same team.
Content of this page reviewed by our technicians on 4 September 2026.
We ask what you have seen and where. If the signs are unclear, we book the visual assessment visit, which is included and takes little time. And when the signs are there, what we recommend is the technical study: audiotermes, a floor plan of the issues found and a report, with your written quote so you decide with the figure in front of you. If the wood is healthy, we tell you that too: you save yourself the treatment.
602 433 979The visual assessment visit is included, at no cost and with no obligation: when the signs are unclear, it is the way to clear doubts. Even so, we always recommend the technical study with audiotermes, a floor plan of the issues found and a report, which is quoted separately: it confirms every point of damage, fixes where the treatment must act and from it comes your written quote, so you decide with the figure in front of you.
We serve the provinces of Barcelona and Girona.
* Required fields