The call we get most often from Jauhar is from a fourth-floor flat. Someone has found blistered paint at the skirting or a hollow door frame, and wants the skirting treated. We could do that, take the money, and be back next year, because the insect eating that skirting does not live in the flat. Coptotermes heimi and Heterotermes indicola are subterranean: the colony lives in the soil under the building and keeps an unbroken moisture connection to it. What you see on the fourth floor is the far end of a supply line that starts in the ground, and treating the far end of a supply line is not a treatment. This page explains what a real answer looks like in a Jauhar apartment block, alongside our Karachi-wide termite control service and our local pest control in Gulistan-e-Jauhar.
How a colony in the soil reaches your fourth floor
Termites are soft-bodied and lose water rapidly in open air, so they do not walk up a wall. They travel inside enclosed, humid runways they build or find, and an apartment block supplies both.
The shared column. A reinforced concrete column runs from foundation to roof and is the most direct route in the building. Termites do not eat concrete, but they exploit the gaps it leaves: the interface between column and the blockwork packed against it, shrinkage cracks, cold joints, and voids where formwork tie-holes were never properly filled. A colony working up a column line reaches the top floor as easily as the first — the vertical distance costs it nothing once the runway is enclosed.
Service ducts and plumbing chases. Every stack of flats shares vertical chases carrying the soil pipe, water risers and electrical conduit. They are enclosed, unlit, undisturbed, frequently damp from a weeping joint, and they cross every floor slab through a penetration that was cut generously and filled casually. This is the route we most often find in Jauhar, and it explains the pattern residents cannot account for: activity in the same corner of flats stacked vertically above one another, while the flat next door on the same landing is clean.
Expansion joints, cavities and mud tubes. Long blocks have expansion joints running the full height, and older construction has cavities that function as corridors whether or not anyone intended it. Where no ready-made runway exists the colony builds one — a tube of soil, saliva and faecal cement, pencil- to thumb-width, up a plinth, a column face or the back of a service shaft. Moist inside with pale insects when broken means active; a dry crumbling tube is old, and an old tube on a column tells you the route existed and has likely been rebuilt out of sight.
Why the single-flat treatment fails
Inject a hollow door frame and a run of skirting on the fourth floor and you kill the workers currently in that timber. You have removed a fraction of a colony’s foraging force from one of its many feeding sites. The colony is undamaged — the reproductives, the nest and the great majority of the workers are in the soil, and the foraging territory of a mature Coptotermes heimi colony covers considerably more than one flat.
What follows is predictable. The treated timber goes quiet, the flat looks solved for months, then activity appears in the adjacent room, the wardrobe backing, or the flat above. Households read this as a new infestation or a treatment that wore off. It is neither — it is the same colony, never touched, feeding elsewhere on the same building.
What a building-wide soil treatment actually involves
The objective is a continuous treated zone in the soil that the colony cannot cross without picking up the active, around the entire footprint and at every point where soil meets structure. In an occupied block that is a construction-adjacent job, not a spraying visit.
The external perimeter. A trench or line of drill holes at close, regular centres around the full perimeter, taken down against the foundation, injected under pressure so the solution spreads laterally. Where paving, a driveway or a car-park slab abuts the building, the line is drilled through the slab and injected beneath it, then made good. Skipping the paved stretches because drilling is inconvenient is the commonest way a perimeter ends up discontinuous, and a barrier with a gap is not a barrier, it is a funnel.
The internal ground floor. Drilling along internal wall-floor junctions at ground level, through the plinth, and at every column base, lift pit, stair core and riser foot. This is where the vertical routes begin, and it is the half of the job that decides whether the upper floors stay clear.
Every penetration. Soil pipe and riser entries, electrical conduit, lift pit and any duct touching soil, treated and then sealed. A single untreated conduit entry re-opens the route the rest of the day’s work closed.
The chemistry. Our soil active is standard fipronil [1], applied at the label rate, with Agenda (fipronil) as the upgrade for a ten-year warranty. Fipronil is non-repellent — the termites cannot detect the treated soil, so they pass through it and carry the active back into the colony by contact and grooming, reaching individuals no application ever touches. That mechanism is the whole reason a barrier works on a nest we cannot find, and it is also why the result appears over weeks rather than on the day.
The Jauhar specifics
Blocks 1 to 19, two quite different building stocks. Jauhar mixes multi-storey apartment projects with plot-built houses on the same block. The house is a conventional post-construction job with a perimeter we can walk. The apartment block is the job described above and needs a decision-maker who is not a single flat owner. Tell us which you live in at booking.
The University Road and Rashid Minhas corridors. Buildings fronting these roads sit on continuous paved ground, so their soil contact is concentrated at planted strips, car-park islands and the rear service lane rather than spread around an open plot. That narrows where a colony can be, which helps the survey, and it means the drilling is largely through slab, which is slower and noisier and has to be planned with the building.
Newer blocks are not exempt. Much of Jauhar’s stock went up without pre-construction soil proofing, which is where the protection should have come from at a fraction of the cost of remediating later. Buried shuttering timber and offcuts left in backfill are a common founding site — the colony arrives with the building. If you are involved in a project still under construction, pre-construction termite proofing is the intervention that makes this page unnecessary for that building.
Our protocol
Step 1. Survey the building, not the flat. The affected unit, the units directly above and below, the ground floor, stilt or basement parking, service risers and chases, the lift pit, the perimeter, and every landscaped strip touching the structure. Timber sounded for the hollow note, mud tubes traced, moisture checked where walls stayed damp.
Step 2. Establish the route and the likely soil contact. Mapping activity vertically through the stack usually identifies the column line or chase being used, and that points to where the colony meets the ground. This finding decides the scope of everything after it.
Step 3. Scope and quote honestly. Either this is a whole-building job or a genuinely isolated case a single-unit treatment will hold. Both happen. We say which, even when the person in front of us can only authorise the second.
Step 4. Soil treatment, perimeter and internal ground level. Drilling, pressure injection, penetrations and making good, as set out above. Access to parking, service areas and the ground floor is arranged with the building beforehand.
Step 5. Remedial treatment in affected units. Injection into infested timber and voids in the flats with activity, scheduled around residents.
Step 6 — Records, warranty and follow-up. Written application record per elevation, warranty documented, follow-up booked. On a building job the follow-up matters more than on a house, because a missed penetration shows up as continuing activity in one stack while the rest goes quiet.
If you can only treat your own flat
Many Jauhar residents cannot get a committee to act, and we would rather tell you plainly what a single-unit treatment does than imply more. It will clear the timber in your flat and hold for a period that depends entirely on how heavy the colony pressure is on your stack. It is a repair, not a cure.
What genuinely helps in the meantime, at no cost to you: get any leak in the chase serving your line of flats fixed, because the damp is what makes the runway habitable. Keep timber and cartons off the floor against external walls. And take the survey report to your committee — a written finding that the colony is in the soil, with the route mapped, is far more persuasive than one owner’s complaint.
Pricing and warranty
Post-construction termite treatment runs PKR 14,000-60,000 depending on property size and how many zones are active. A single-zone job in a one-bedroom apartment is at the floor of that; large properties with long treated perimeters are at the top. Pre-construction proofing is PKR 18-35 per square foot of plinth. Annual re-inspection is PKR 4,500-8,500 per year. Full detail on our termite treatment cost guide.
Building-wide programmes are quoted per building after survey, on perimeter length, how much is drilled through slab, the number of penetrations, and how many units need remedial work. There is no per-flat list price and we will not invent one. It works out lower per flat than the same units treated individually, and unlike individual treatments it removes the reservoir rather than trimming it.
Rates are the same in Gulistan-e-Jauhar as in DHA, Clifton, Gulshan-e-Iqbal, PECHS, Bahadurabad and North Nazimabad — there is no postcode premium. Termite proofing — a pre-construction soil barrier, or a full drill-and-inject barrier around an existing building — carries a 7-year warranty with standard fipronil, or 10 years with the Agenda upgrade (quoted on request). Termite control, such as treating a single flat’s skirting without a building barrier, carries a 1-year warranty, and an annual maintenance contract does not extend it.
Booking, and what happens on the day
WhatsApp +92-311-1101810 with your Jauhar block number, whether it is a flat or a house, your floor, and photos of the damage and of any mud tube you can find. Two answers help most: whether the flats directly above or below you have the same problem, and whether there is a landscaped strip, planter or car-park island against the building. Confirmation inside 30 minutes during business hours, Mon-Sat 09:30-20:00. Jauhar is 30-40 minutes from our Phase 4 office.
The survey is first and takes about an hour for a flat plus the building’s common areas — please arrange torch access to the stilt parking, service risers and ground-floor plant area, because that is usually where the answer is. A technician arrives with drilling equipment, injection lances, measured chemistry, moisture meter, torch and PPE. On a treatment day expect drilling noise and dust in common areas; a full perimeter on a mid-size block is a day or more. Holes are small, sealed and made good before we leave, and do not affect structural capacity. There is no evacuation requirement for the soil work, and the written application record is handed over at completion.
Gulistan-e-Jauhar questions
Which Jauhar blocks do you cover?
Block 1 through Block 19, plus the University Road and Rashid Minhas Road corridors, Perfume Chowk and Johar Chowrangi, at identical published rates. Where several flats in one building are affected we survey it in a single visit rather than each flat separately.
I am on the fifth floor. How can termites be a soil problem?
Because they never left the soil. The colony stays in the ground and sends foraging workers up an enclosed, humid route — a column interface, a plumbing chase, an expansion joint or a mud tube — to the timber on your floor. Height is no obstacle once the runway is enclosed, which is why treatment goes where the colony lives rather than where you can see it.
My neighbour treated their flat and it came back. Why?
Because the treatment removed the workers in their timber, not the colony in the ground. Once that flat’s feeding site was disrupted, foraging continued elsewhere on the same building — the next room, the flat above, or your flat. It is the same colony throughout, and it is the most common pattern we see in Jauhar apartment blocks.
Do all the flats need to be treated?
No. The soil treatment is what has to be building-wide, and that is done at ground level and around the perimeter, not inside every unit. Remedial injection is only needed in flats with activity. A building-wide programme is far less intrusive than the phrase suggests — most residents never have a technician in their flat.
Should I use bait stations instead in an apartment block?
Sometimes, depending on how much accessible soil the building has. Baiting intercepts foragers in the ground and needs stations sited in soil around the structure — on a block paved to the boundary there is very little of that. Where a building has genuine landscaped ground the two can be combined. We compare the mechanisms in liquid barrier vs bait stations.
Book termite control across Gulistan-e-Jauhar Blocks 1-19
WhatsApp or call +92-311-1101810, or email contact@nestfumigationservices.com. We cover Gulistan-e-Jauhar Blocks 1-19 and the University Road and Rashid Minhas corridors from our office at Plot #14, 2/1 2nd Gizri Street, DHA Phase 4, Karachi 75500, Mon-Sat 09:30-20:00. ISO 9001:2015 certified; members of KCCI, SPMA and PPMA. See also our Karachi-wide termite control service, pest control in Gulistan-e-Jauhar, and how to identify termite damage.
Saad Danish is a co-founder and director of Nest Fumigation Services Private Limited, a licensed pest-control and fumigation company based in DHA Phase 4, Karachi. He oversees the company's administration, client services, and marketing, working alongside NFS's technical team to deliver residential and commercial pest management across Karachi — from termite proofing and general pest control to HACCP and Sindh Food Authority compliance programmes for food, warehouse, and industrial clients. Nest Fumigation Services is ISO 9001:2015 certified and a member of the SPMA (Sindh Pest Management Association), PPMA, and the Karachi Chamber of Commerce and Industry.
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