What is the minimum mesh requirement for wire screens on doors and windows?

The minimum mesh requirement for wire screens on doors and windows is set to ensure adequate protection against insects while allowing airflow and visibility. A mesh count of 16 meshes per linear inch meets the standards for effective screening. This specification helps to keep out smaller insects without significantly obstructing light and air circulation.

While other mesh counts can provide more or less screening, 16 meshes per linear inch strikes a balance that is widely accepted in various building regulations, including those outlined in the Code of Maryland Regulations. Higher mesh counts might provide finer filtration, but they can also reduce airflow and natural light, making them less practical for typical residential applications.