What should be done to ensure walls and floors are vermin-proof in a laboratory?

To ensure that walls and floors are vermin-proof in a laboratory setting, sealing cracks and crevices is the most effective approach. This practice prevents rodents and other pests from entering the facility through even the smallest openings. Rodents can squeeze through remarkably small spaces, so sealing all potential entry points is essential for maintaining a controlled and hygienic environment.

Additionally, sealing these areas contributes to the overall integrity of the laboratory, preventing contamination and the spread of diseases that can arise from pest infestations. Ensuring a vermin-proof environment is critical, particularly in laboratories where research and sensitive experiments occur that could be compromised by the presence of pests.

Other methods, such as leaving small cracks for ventilation, would directly contradict the goal of pest prevention by providing entry points. While using heavy materials for walls may add strength and durability, they may not necessarily prevent vermin access if cracks and gaps are present. Painting with bright colors may enhance visibility and aesthetics but does not contribute to vermin control. Therefore, sealing cracks and crevices is fundamentally the most reliable method for ensuring a pest-free laboratory environment.