How large should vent screen holes be for effective rodent proofing?

The appropriate size for vent screen holes for effective rodent proofing should be 1/4 inch. This size is small enough to prevent most common rodents, such as mice and rats, from squeezing through. Rodents are able to squeeze through surprisingly small openings, as their bodies are quite flexible. For example, a mouse can fit through an opening as small as 1/4 inch.

When it comes to pest control, it's essential to consider the physical capabilities of rodents. A screen with holes larger than this size would compromise the effectiveness of the containment and may allow access to these pests, leading to infestations that can bring health risks and property damage. Therefore, using a 1/4 inch size for vent screen holes effectively balances airflow with the need for pest exclusion.