Sheathing application is the most preferred and most effective application for external insulation of buildings. It is a system that is complicated and requires expertise with the combination of many hardware. Sheathing plastic dowel is the reinforcement used for fixing the thermal insulation boards used while sheathing to the building facades. Sheathing plastic dowels are a reinforcement material that is produced from plastic raw materials and can offer many different options/dimensions depending on the wall structure of the building to be applied and the thickness of the sheathing insulation plate. According to the material used and the structure of the wall, the amount of pressure is measured, and the number of carrier holes to be drilled per square meter of the sheathing insulation plate is determined, and accordingly, sheathing plastic dowels are nailed to the holes drilled with the necessary equipment on the plate.