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 enoughandnbsp;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.