Insulated walls, vinyl wall paper or those that have wicked more than just a little.
With the injectidry you can also draw air from the cavity and use the intercepter HEPA to filter it.
If more than a couple of a days has passed and there is concern of possible contamination (not gross mold growth), but the don't want the walls removed, we will use the adaptidry with neg air machines doing the suction.
This is done with complete explanation and a possible refusal of recommendations signed.