Fumigation Services

Fumigation is not a routine pest control method. It is deployed when conventional treatments such as spraying, fogging, trapping, and baiting cannot reach the source of the infestation or when the scale of the problem demands total elimination in a single treatment cycle.

Common situations requiring fumigation include:

• Severe stored product infestations: Beetle and moth larvae deep within grain, flour, cereals, dried fruit, nuts, spices, and other food commodities. Surface treatments cannot reach eggs and larvae hidden within the product itself.
• Empty premises treatments: Warehouses, food factories, and processing facilities that need to be completely cleared of all pest activity before restocking, recommissioning, or handover to a new tenant.
• Woodworm in structural timbers: Where conventional woodworm treatment cannot reach all affected timbers, fumigation provides complete coverage throughout the structure.
• Multi-species infestations: When several pest species are present simultaneously and a single comprehensive treatment is more effective than targeting each species individually.

We always assess whether less disruptive methods can achieve the same result before recommending fumigation. When it is the right solution, we plan and execute it to minimise downtime for your business.

The choice of fumigant depends on the target pest, the type of commodity or structure being treated, and the specific regulatory requirements.

Phosphine (hydrogen phosphide): Generated from aluminium phosphide or magnesium phosphide tablets or pellets. Phosphine is the most widely used fumigant for stored product pests in the UK. It is effective against all life stages of beetles, moths, and mites in grain, flour, dried goods, and other food commodities. Phosphine is highly toxic to humans and requires certified operators and strict safety protocols.

Sulfuryl fluoride: A colourless, odourless gas used for structural fumigation and certain stored product applications. It is effective against wood-boring insects including woodworm and dry rot. Sulfuryl fluoride does not leave residues on treated surfaces, making it suitable for food processing environments after ventilation.

Carbon dioxide (CO2): Used as an alternative fumigant in enclosed commodity treatments. CO2 fumigation works by displacing oxygen to lethal levels for insects. It requires longer exposure periods than chemical fumigants but leaves no chemical residue. Suitable for organic and chemical-sensitive products.

Methyl bromide, formerly the most widely used fumigant worldwide, has been banned in the UK since 2010 under the Montreal Protocol due to its ozone-depleting properties. All fumigation now uses approved alternative substances.

Stored product pests, including grain beetles, flour beetles, saw-toothed grain beetles, Indian meal moths, and warehouse moths, cause significant losses to food storage and manufacturing businesses. Their larvae develop deep inside commodities where surface treatments cannot reach them.

Fumigation is the definitive treatment for severe stored product infestations. The gas penetrates throughout the commodity mass, killing eggs, larvae, pupae, and adults simultaneously. This is particularly important for bulk grain storage in silos and bins, flour mills and bakery ingredient stores, dried fruit, nut, and spice warehouses, animal feed storage, and import/export commodities requiring phytosanitary certification.

After fumigation, we work with you to implement preventative measures including improved stock rotation, temperature management, monitoring programmes using pheromone traps, and building proofing to reduce the risk of re-infestation. Our integrated pest management programmes provide ongoing protection between treatments.

No person is permitted to re-enter a fumigated space until gas concentrations have been confirmed below the Workplace Exposure Limit (WEL) using calibrated gas detection equipment. This is a strict legal requirement, not a discretionary step.

Our clearance process involves opening seals in a controlled sequence to begin ventilation, using forced ventilation (fans) to accelerate gas dispersal where appropriate, continuous monitoring of gas concentrations at multiple points within the treated space, monitoring at breathing height (approximately 1.5 metres from the floor), and issuing a written clearance certificate confirming the space is safe for re-entry.

The clearance certificate records the date and time of clearance testing, the gas concentrations measured at each monitoring point, the name and certification number of the operative, and confirmation that the space is safe for unrestricted access. This document forms part of your treatment record and is available for audit inspection.

Both fumigation and heat treatment achieve complete pest elimination, but they work through different mechanisms and are suited to different situations.

Fumigation uses a toxic gas to kill pests at all life stages. It is effective in very large spaces (warehouses, silos), can treat commodities in situ, and works regardless of ambient temperature. However, it requires full evacuation, produces chemical residues on some surfaces, and demands certified operatives.

Heat treatment raises the ambient temperature throughout the treatment area to levels lethal to pests (typically 56 degrees Celsius sustained for several hours). It leaves no chemical residue, requires no fumigant certification, and allows faster re-entry after treatment. However, it is limited by the volume that can be heated effectively and is not suitable for temperature-sensitive commodities.

We recommend the appropriate method based on the pest species, the size and type of the treatment area, the contents of the space, and your operational constraints. In some cases, a combination of both methods provides the most effective solution.

Our fumigation services cover a wide range of commercial and industrial applications across the North East, from Newcastle and Sunderland to Darlington and Middlesbrough.

Key sectors include food manufacturing and storage (grain stores, flour mills, bakeries, dried goods warehouses), industrial premises (factories, processing plants, distribution centres), hospitality and accommodation (hotels dealing with severe bed bug infestations), agricultural storage (farm grain stores, animal feed silos), and heritage buildings (museums, archives, and libraries with textile or paper pest infestations).

For each application, we tailor the fumigant type, concentration, and exposure period to the specific pest, commodity, and premises. All treatments are fully documented and records are provided for your compliance files.