Rodent Proofing

Rodent proofing is a survey-led installation service. The process typically runs over two visits.

Survey visit (Day 1, 45 to 90 minutes): A full inspection of the building perimeter, loading areas, drains, doors, expansion joints, weep vents, and cable and pipework penetrations. All entry risks are identified and photographed. You receive a written proofing report and itemised quotation.

Installation visit (following survey, once approved): Physical proofing materials are installed at all identified entry points. Dock leveller seals, door brush strips, mesh, expansion joint fill, weep vent covers, and ground mesh are fitted as required. Duration varies by scope, typically 1 to 8 hours. A completion report is issued on the day.

Some straightforward jobs, such as a single door seal or weep vent proofing, can be completed in a single visit.

No chemicals or toxicants are involved in rodent proofing. There is no vacate period required. All proofing work uses mechanical and physical barriers only, making it fully safe for all occupants, children, pets, and food production environments throughout the process.

Dock levellers are a major entry point for rodents in warehousing, supermarkets, distribution centres, and any premises with loading areas. Data shows around 30 percent of rodent infestations in these environments originate from loading areas where gaps around dock levellers provide direct access.

Our dock leveller proofing uses a combination of Kevlar and knitted steel mesh that is flexible enough to accommodate variations in dock leveller size, height, and movement while remaining completely impenetrable to rodent gnawing. The material flexes with the dock leveller as it operates, maintaining a continuous seal.

Beyond rodent exclusion, dock leveller proofing also acts as a barrier to dirt, debris, wind, and rain. It helps reduce light ingress, odour transfer, and energy loss from temperature-controlled environments, which can be a significant benefit for food storage and distribution facilities.

This proofing is particularly important for businesses subject to BRC, HACCP, or other food safety audits where evidence of physical rodent exclusion at loading areas is expected.

Weep holes and air bricks in brickwork serve essential purposes: weep vents allow moisture to drain from behind the outer leaf of masonry, and air bricks provide ventilation to sub-floor spaces. However, both provide direct access to wall cavities, and once a rodent enters a cavity, it can travel throughout a building undetected.

Our weep vent proofing uses breathable yet sturdy stainless steel knitted mesh that seals the opening without impeding drainage or natural ventilation. The mesh can be fitted to weep vents of any size without damaging the surrounding brickwork and mortar.

Air brick covers use a similar approach, with galvanised wire mesh fitted over the air brick to maintain airflow while creating an impenetrable barrier to rodents and insects.

This proofing is important for both commercial and domestic properties. In homes, unsealed weep vents are one of the most common routes for mice to enter wall cavities, leading to scratching noises, droppings in loft spaces, and contamination of stored items.

Rats are prolific burrowers. Brown rats dig extensive burrow systems near foundations, under sheds, beneath decking, and along building perimeters. Burrowing creates harbourage sites close to buildings and can undermine structural integrity over time.

Ground mesh is a highly corrosion-resistant, flexible, and sturdy covering installed at ground level around the perimeter of buildings. It prevents burrowing pests from creating underground dens and harbourage sites close to facilities.

This proofing is particularly effective for:

• Warehouse and factory perimeters where burrow activity is common
• Properties adjacent to farmland, waterways, or waste ground
• Buildings with shallow foundations or raised floor voids
• Sites where outdoor bait stations are attracting rodent activity near building edges

Ground mesh can be installed as a standalone measure or as part of a comprehensive perimeter proofing programme that also addresses doors, vents, and cladding gaps.

The scope and specification of rodent proofing differs significantly between commercial and residential properties.

For businesses: Commercial proofing centres on compliance, risk mitigation, and asset protection. Food premises (restaurants, cafes, hotels, food processing facilities, and supermarkets) face statutory obligations under food safety and hygiene regulations. A rodent sighting during an Environmental Health Officer inspection can result in closure notices, improvement orders, and lasting reputational damage.

Commercial proofing typically covers larger areas and requires industrial-specification materials: dock leveller seals, expansion joint fills, building seal mesh, and heavy-duty door proofing designed for high-traffic environments. All work is documented with photographs and completion reports that support audit compliance.

Healthcare facilities, care homes, schools, and rental properties all have specific regulatory requirements around pest prevention that proofing directly supports.

For homes: Residential proofing focuses on the most common domestic entry points: weep vents, air bricks, door gaps, roofline openings, and gaps around utility penetrations. The materials are the same professional-grade specification, but the scope is typically smaller and the work can often be completed in a single visit.

For homeowners dealing with recurring rat or mouse problems, proofing is the single most effective step to stop the cycle. Treatment removes the current population; proofing prevents the next one. We carry out domestic and commercial proofing across the North East, including Durham, Middlesbrough, Sunderland, and surrounding areas.

Many customers, particularly homeowners with children and pets, are reluctant to use rodenticides. Rodent proofing itself is entirely chemical-free, but where active control is also needed, there are bait-free alternatives that can complement a proofing programme.

No single alternative method is guaranteed to eliminate an established infestation. Every approach must be backed up with prevention measures to deny rats and mice access to food and shelter.

Spring and snap traps: Designed to kill rodents with a spring release mechanism. Advantages over rodenticides for small infestations in homes and garages include avoiding toxic chemicals, being reasonably cheap and reusable, allowing confirmation that a rodent has been caught, and preventing decomposition smells in inaccessible spaces. Place traps along rat or mouse runs, usually along walls, with the trigger side flush against the wall. Traps must be checked frequently to remove dead animals and humanely deal with any caught alive.

Bait selection and bait shyness: Rodent traps require food bait to attract the target. Rodents have poor eyesight but a highly developed sense of taste and smell. They prefer cereal grains, meat, fish, nuts, peanut butter, and chocolate spread. Bait that is difficult for rodents to remove (such as peanut butter) tends to be more successful. Rats are neophobic (cautious of new objects) and will initially avoid anything new in their environment. Placing traps with food but not setting the trigger for a few days helps overcome trap and bait shyness.

Ultrasonic repellents (not effective): Many electronic devices claim to repel rodents using ultrasound. However, ultrasound dissipates quickly with distance and is blocked by objects. There is only limited evidence of short-term effect in very small spaces. Rodents quickly become accustomed to the sound, and their need for food and shelter will always overpower any noise disturbance. Ultrasonic repellents are not a reliable solution for established infestations.

Scent repellents (not effective): Rodents may find some smells temporarily unpleasant, such as ammonia, mothballs, peppermint oil, and eucalyptus. However, none are effective long-term repellents. Scents fade quickly and are easily ignored when a food source is present. Professional exclusion, proofing, and sanitation remain the only reliable long-term approaches.

Rodent proofing can be carried out at any time of year, but timing it well maximises its impact.

After treatment: The most common time to arrange proofing is immediately after a rat or mouse treatment programme. Once the existing infestation has been resolved, proofing closes the entry points that allowed rodents in, preventing re-infestation.

Before autumn (June to August): The autumn ingress, when rodents move indoors as temperatures drop, is the peak period for new infestations across the North East. Properties near farmland, waterways, and older drainage systems in areas such as Darlington, Stockton, and Hartlepool are particularly vulnerable. Proofing in summer seals entry points before the pressure increases.

New builds and renovations: Proofing is far easier and more cost-effective to install during construction or renovation than after the fact. We work with builders and property developers to integrate proofing into the build programme.

As part of a new pest contract: When businesses set up new pest management contracts, adding a proofing survey at the outset identifies physical improvements that reduce the ongoing cost and frequency of reactive visits.

After a failed DIY attempt: If you have attempted to seal entry points yourself but rodent activity has returned, a professional survey will identify the gaps that were missed and the materials that failed.