It is recommended to do this work ideally when it is dark (total obscurity). It is then best to wear a work suit with collar and buttoned cuffs and put the legs of the pants in the stockings. A protective hat with a mosquito net and thick gloves will give you better protection..
- Seal the external cracks whereby insects can infiltrate to build a nest in a structure void.
Use a foam insecticide for a visible nest (paper nest)
Apply a powdered insecticide into the crack through which insects infiltrate