Building Bridges: Effective Pest Management in Multi-Housing Buildings

By adopting an Integrated Pest Management (IPM) approach, PMPs can bridge the gap between effective pest control and the unique challenges posed by multi-housing buildings. In this article, Dr. Mohammed El-Damir explores challenges faced in these environments and provides valuable insights into implementing a successful IPM plan.

Photo: ©pidjoe | iStock

Photo: ©pidjoe | iStock
Managing pests in multi-housing buildings can be a daunting task, presenting numerous challenges for property owners and managers. With the high population density, shared spaces, and the constant influx of new tenants, pests find ample opportunities to thrive and multiply. From cockroaches and rodents to flies and bed bugs, these unwelcome guests can cause significant disruption, health risks, and financial burdens. However, by adopting an Integrated Pest Management (IPM) approach, we can bridge the gap between effective pest control and the unique challenges posed by multi-housing buildings. In this article, we will explore the challenges faced in pest management and provide valuable insights into implementing a successful IPM plan.
 
What are some of the challenges in pest management in multi-housing buildings? 
 
High Population Density and Garbage Generation:

(1) The high population density in multi-housing buildings increases pest problems, especially when accompanied by improper garbage disposal. Cockroaches, rodents, and flies are attracted to areas with abundant food sources, and garbage provides an ideal breeding ground for these pests. Proper garbage disposal and effective management of trash storage areas are essential to prevent infestations and facilitate control measures.

Shared Spaces:(2) Shared spaces such as hallways, laundry rooms, and common areas pose a challenge for pest control in multi-housing units. Pests can easily move from one unit to another through these areas, making it difficult to control infestations. Strategies like sealing cracks and crevices, placing traps and baits, and regular inspections can prevent pests from spreading between units.

Shared Boundaries:

(3) Pests such as cockroaches, rodents, and bed bugs can easily move from one unit to another in multi-housing buildings through shared boundaries like walls, floors, and ceilings. When pests face resource limitations, overpopulation, or environmental disturbance, they may start looking for new habitats and can quickly spread to nearby units, making it difficult to control infestations. Proper pest control measures, such as regular inspections and treatments, can help prevent pests from moving between units and reduce the risk of infestations spreading.  

New Tenants and Pest Introduction:
(4)
 New tenants can unknowingly bring pests with them or may not be aware of existing pest issues. This can lead to the spread of pests throughout the property and pose health and safety concerns for all tenants. Proper education and awareness among tenants are necessary to prevent the introduction and spread of pests.

Limited Access and Chemical Sensitivity:

(5) Addressing pest problems becomes challenging when tenants do not grant access to their units or no keys are available to access neglected areas where pests may reside. Additionally, some tenants may have sensitivities or allergies to chemicals used in pest control treatments, limiting the options for effective control methods.

Pesticide Resistance:
(6) 
Repeated exposure to the same pesticide is common in the multi-housing industry, which can lead to the development of pesticide-resistant pest populations. This resistance makes it more difficult to control infestations using the same pesticide. Implementing comprehensive control methods and periodically changing pesticides can help mitigate this issue.

Cost and Shortcuts:

(7) Pest control in multi-housing units can be expensive, especially for widespread infestations requiring repeated treatments. This cost may tempt management to take risky shortcuts to save money, leading to more pests and costlier problems in the long run. Prioritizing effective pest control measures over cost-saving can prevent such issues.

Lack of Awareness and Over-the-Counter Pesticides:(8) Many tenants may lack awareness of proper pest prevention measures, contributing to the spread of infestations. Relying on over-the-counter pesticides and do-it-yourself methods can be ineffective, potentially hazardous, and interfere with professional pest control efforts. Proper education and discouraging self-treatment can help prevent these issues.

People's Tolerance Levels to Pests:
(9) People have varying tolerance levels towards pests that may affect the frequency of treatments and reporting of infestations. The level of tolerance for different pests can vary depending on the specific species of the pest. For example, some pests like bed bugs, cockroaches, and rodents are generally viewed as more intolerable and unacceptable than others like silverfish or spiders. This variation in tolerance can be influenced by several factors, including the pest's ability to cause physical harm, spread disease, or cause property damage. Additionally, people may have different levels of familiarity or aversion to different pests based on their personal experiences and cultural backgrounds. In general, people with low tolerance levels for pests require frequent treatments; while those with high tolerance levels for pests do not feel the need to report infestations. 
 
EFFECTIVE PEST MANAGEMENT TIPS FOR MULTI-FAMILY HOUSING BUILDINGS
To effectively address pest control challenges in multi-housing buildings, implementing the Integrated Pest Management (IPM) approach is crucial. IPM is a problem-solving process that aims to find long-term solutions to pest problems while minimizing the impact on human health and the environment. It consists of several components, including assessment, prevention, elimination, communication, documentation, and education. 
 
ASSESSMENT. Assessment is the first step in IPM and involves conducting interviews, inspections, and monitoring both indoors and outdoors to identify pest-vulnerable areas (PVAs) and evaluate the effectiveness of the IPM plan.
 
Interviewing. Interviewing tenants is an essential part of the assessment process. By asking specific questions, such as the type of pests seen, the level of infestation, their location, any damages caused, their source, the duration of the infestation, and any history of past pest problems, valuable information can be obtained. However, it's important to be cautious about imaginary reports, delusory parasitosis, and misidentification of pest problems. The information gathered through interviews helps in tailoring control strategies and preventing future infestations. However, it is important to not solely rely on tenant reports. Thorough inspections are necessary to accurately identify the extent of infestations and the type of pests causing the problem. 
 
Inspection. Inspection is a crucial assessment tool. It involves a thorough examination of the property, both indoors and outdoors, equipped with various tools such as flashlights, inspection mirrors, knee pads, gloves, notepads, cameras or smartphones, ladders, and other necessary equipment. Inspections help identify pest-vulnerable areas and conducive conditions that attract pests and make it easier for them to survive and reproduce.
 
Monitoring. Monitoring is an ongoing process that complements inspections. While inspections provide a snapshot of pest activity at a given time, monitoring works 24/7, capturing information about pests over time and from various locations. This helps in early detection, determining treatment needs based on the number of catches, and evaluating the effectiveness of control measures. 
 
Monitoring tools may include multiple-catch mouse traps (MCMTs), snap traps for mice and rats, insect light traps (ILTs) for flying insects, and pheromone traps for stored product insects and clothes moths.
 
PREVENTION. Prevention is believed to be the essential component of IPM in multi-housing. This is because effective pest management relies on identifying and addressing the root causes of pest infestations, rather than simply reacting to the problem once it occurs. Consequently, prevention is considered to be the most cost-effective approach to pest management in multi-housing settings. By identifying and addressing the root causes of pest infestations before they occur, property managers can avoid the costly expenses associated with treating severe pest infestations, such as hiring exterminators, replacing damaged property, and potential lawsuits from tenants. Additionally, prevention measures can help to maintain a positive relationship between tenants and management, as tenants are more likely to feel satisfied and secure in a pest-free environment. Here are some key steps to prevent pest infestation in multi-housing buildings:
 
(1) Pest-Proofing/Exclusion:
● Seal all indoor and outdoor gaps and burrows, including cracks in walls, doors, and windows.
● Install self-closing and self-locking doors at all entrances.
● Use door sweeps and weather stripping to block gaps that pests could enter through.
● Trim trees and bushes away from the building to prevent potential pests from leaping the structure.

● Consider installing air curtains over doorways to keep flying insects out.

(2) Remove Shelter and Sanitation:
Management Responsibilities:

● Eliminate clutter, cracks, and crevices that provide hiding places for pests.
● Address moisture issues quickly, such as leaks or standing water.
● Clean common areas regularly and maintain good sanitation.
● Keep landscaping well-maintained by trimming grass, bushes, and trees, and removing debris or standing water.

● Dispose of garbage, recyclables, and other items properly and promptly. Keep outdoor garbage cans and compost bins sealed tightly to prevent pests from accessing them. Also, avoid leaving food and crumbs out in common areas, and clean up spills and messes promptly.

Tenant Responsibilities:

● Keep utility areas clean and free of clutter.
● Store dry food in tightly sealed containers.
● Avoid using cardboard boxes or clutter as hiding places for pests, and use plastic bins with tight-fitting lids instead.
● Clean kitchen surfaces regularly to eliminate crumbs or spills.
● Dispose of trash in sealed containers and remove it from the unit regularly.
● Avoid feeding wildlife near the building.
● Report moisture problems, leaks, and signs of pests to the property manager promptly so they can take action.
 
(3) Inspect Deliveries: 
Train building management staff to identify signs of pest activity and handle deliveries suspected of carrying pests.
 
ELIMINATION. Elimination is a crucial aspect of IPM in multi-housing settings. Pests can quickly reproduce and spread throughout the building, causing significant damage to the property, affecting the health and well-being of residents, and potentially harming the reputation of the property management company. In addition, the longer a pest infestation persists, the more challenging and costly it can become to eliminate.

To effectively carry out the elimination process while considering the well-being of tenants, we recommend the following tips:

● Consider Tenant Schedules: Schedule treatments at convenient times to minimize disruptions to tenants' daily routines. Provide sufficient notice to allow tenants to prepare for the treatment, as lack of preparation can lead to treatment failure.

● Consider Chemical Sensitivity: Take into account the sensitivities and allergies of tenants when selecting and applying pest control products. Use appropriate alternatives or non-chemical methods when necessary to ensure the safety and comfort of residents.

● Establish Clear Roles and Expectations: It is crucial to ensure that everyone involved in the pest elimination process, including PMPs, building management, and tenants, understands their roles and responsibilities. A comprehensive pest elimination response plan should be developed, outlining the necessary steps to address pest issues, designating specific contacts for reporting sightings, documenting and reporting sightings, and following up on treatments. 

● Tailoring Elimination Methods: Select the most appropriate course of action based on various factors such as the type of pests, the surface to be treated, the presence of heat and moisture, chemical sensitivity, and the potential risk of contamination. Assess whether dust, spray, bait, granular, or thermal methods would be most effective for the specific situation.

Here are some guidelines for each elimination method:

● Insecticide Dust: Apply insecticide dust lightly and uniformly to voids and harborage areas where pests are likely to reside. Be cautious to avoid excessive dust application, as it can pose health risks and deter pests. Encourage tenants to refrain from self-treating by randomly applying pesticide dust. Improper applications of dust can interfere with professional treatments and pose health risks.

● Bait Placement: Strategically place insecticide baits near foraging trails and areas where pests are likely to come into contact with them. Take necessary safety measures to minimize risks to humans and pets.

● Rodenticide Baits: Secure rodenticide baits in tamper-proof bait stations with self-feeding hoppers to prevent access by non-target animals. Place the bait stations in areas with rodent activity, such as runways, locations with fresh droppings, and entryways. Follow label instructions regarding the number of baits, spacing, and other specific guidelines.

● Sprays (Liquid Residual Insecticide): In multi-housing settings, spray applications are commonly used as an effective method to control and eliminate pests. When spraying in multi-housing environments, it is essential to follow label instructions and use the appropriate equipment. This may include handheld sprayers, backpack sprayers, or power sprayers, depending on the scale of the infestation and the size of the area being treated. Proper calibration of the equipment and adherence to safety guidelines are crucial to ensure effective and safe application. There are several common spray methods utilized in these environments to address pest infestations effectively. These methods include:

1. Spot Treatment: This involves targeting specific areas where pests are present or likely to be found. This method allows for a focused application of pesticides along baseboards, or other areas where pests tend to hide or travel. Spot spraying is particularly useful for localized infestations or for treating specific rooms or units.

2. Perimeter /BarrierTreatment: This involves creating a barrier of protection around the exterior of the building to prevent pests from entering. It typically involves treating the foundation, entry points, windows, and other areas where pests may gain access. Perimeter treatment helps to stop pests from migrating to the interior of the building.

3. Crack and Crevice Spraying: This method focuses on treating cracks, crevices, and voids where pests commonly hide or travel. The spray is directed into these tight spaces to reach and eliminate pests at their source. Crack and crevice spraying is particularly useful for targeting pests such as cockroaches, bed bugs, ants, and spiders that often seek refuge in hard-to-reach areas.

● Granular insecticides can be used as a helpful tool to suppress pests coming from outdoors, such as springtails, millipedes, centipedes, and crickets, from entering multi-housing buildings. These granules are typically made up of organic materials embedded with active ingredients that are released when watered in. While granular insecticides are not a common method of pest elimination in multi-housing, they can be a useful addition to a comprehensive pest management plan. 

● Thermal Remediation/Heat Treatments: Use heat treatments, such as whole-room treatments or heat chambers, to manage insects, especially bed bugs. Lethal temperatures are utilized to eliminate pests effectively.

 

COMMUNICATION. Effective communication with tenants regarding pest management should include the following points:

1. Clearly identify the type of pests that are being targeted, so tenants know what to expect and can take appropriate measures to help prevent infestations.

2. Provide detailed prep sheets in a language that is accessible to all tenants, and review them with each tenant scheduled for pest control services. This will ensure that tenants understand how to prepare their units for treatment and can cooperate fully with pest management efforts.

3. Give residents a schedule of when treatments will be carried out, so they can plan accordingly and be aware of any disruptions that may occur.

4. Keep tenants updated about pest management efforts and treatment expectations. This will help to build trust and keep everyone informed about what is being done to address the issue.

5. Emphasize the tenant's responsibilities in pest prevention by keeping their units clean and reporting any issues promptly. Encourage tenants to maintain good housekeeping practices and remind them that they play a crucial role in preventing pests from becoming a problem.

DOCUMENTATION. Maintaining thorough documentation is vital for effective pest management. Here are some important aspects of documentation:

1. Pest sightings: Keep detailed records of all pest sightings reported by tenants. Include the date, time, location, and description of the sighting. This information helps track the presence and activity of pests and guides treatment decisions.

2. Inspections: Document regular inspections conducted by pest control professionals. Record the areas inspected, findings, and any necessary actions taken.

3. Treatments: Document all pest control treatments performed, including the specific methods used, products applied, and quantities used. Note the date, time, and areas treated. This record helps evaluate the effectiveness of treatments and identifies recurring issues.

EDUCATION. Educating tenants and staff about pest prevention and management is crucial for long-term success. Consider the following educational initiatives:

1. Workshops or seminars: Organize educational sessions to provide tenants with information on pest identification, behavior, and prevention techniques. Address the importance of early reporting and the role of tenants in pest control efforts. The common pests found in multi-housing buildings are: 

● German cockroaches
● Mice
● Bed bugs
● Ants
● Stored product insects: Indian-meal moth, Sawtoothed, dermestid beetles

● Flies: filth and fruit, phorid

2. Brochures or pamphlets: Distribute informative materials that cover common pests found in multi-housing buildings, their identification, signs of infestation, and prevention tips. Ensure the materials are available in multiple languages to cater to diverse tenant populations.

3. Online resources: Share reputable online sources on pest prevention and management with tenants. These can include websites, articles, and videos that offer guidance on implementing preventive measures and understanding the risks associated with DIY pest control methods.

Preventing and controlling pest infestations in multi-housing buildings requires collaboration between building managers, tenants, and pest management professionals. Building managers should conduct regular inspections, provide educational materials to tenants, maintain cleanliness, and implement pest control measures. Tenants can do their part by properly storing food, disposing of trash properly, keeping their units clean, reporting pest sightings, and cooperating with building managers and pest control professionals. By following these tips and working together, we can help to ensure that multi-housing buildings remain pest-free and comfortable for all residents.