The G800 Continuous Soffit Ventilator is designed to provide a solution to roof ventilation where a traditional soffit board is specified. The airflow passage consists of evenly spaced slots specifically sized to prohibit large insects gaining access but wide enough not to be blocked by debris, paint or water droplets.The G800 is usually fixed to the back of the fascia board. A soffit board is then slotted into the adjustable mouth of the vent and then fixed back to the wall as usual. This vent will accept any type of soffit with a thickness of between 4mm and 12mm.