Unlike roller shutters that provide complete coverage, fly screens are made a bit different. With a mesh-like design, fly screens can allow air to flow through the window or door while still stopping small objects like dust, bugs and small pests from getting through.
Roller shutters take security to the next level, completely covering any window (or in some cases, doors) to prevent intruders and unwanted guests from entering your home or business. While roller shutters are great for security, they restrict light and air from entering your premises.
To have the benefits of both flyscreens (airflow and preventing bugs/pests) and security shutters (security to prevent intruders), many home and business owners opt for security windows and security doors.