dome insullation

[limoges]

My uncle (retired bricklayer) and I are building my pizza oven. I am trying to follow your instructions. I've ordered the ceramic fiber blanket for insulation. It appears next we cover with chicken wire like material. Can we stucco right over this? My uncle says we need to put come type of paper over the blanket before stucco so that the blanket does not get soaked and lose it's insulating ability (like getting fiberglass insulation wet). Help!! He's driving me crazy!!