Insulating storm shelter
Hello I am in the process of building a storm shelter / office. I live in the panhandle of Florida close to the southern Alabama line so we are lucky to be high enough in elevation for storm shelters and basements.
I am not building your typical underground shelter but I am using a more environmentally friendly approach by using the earth bag method using an adobe clay mixture in netting type sand bags with 10% Portland added to the mixture for the walls. The issue I am having and trying to figure out is how to insulate the structure to prevent moisture build up.
I was looking into the closed cell foam spray for the exterior of the structure before back filling.
• would this work for my application?
• if so how thick should the structure be sprayed?
• should I also spray the foam down under the slap before pouring to?
• do I need a vaper barrier (6mil plastic?) in conjunction with the exterior foam spray?
• should the vaper barrier, if needed, be on against the walls then the foam or Vise-verse?
• should I spray foam the interior of the exterior is spray foamed?
Sorry for all the questions, this will be the first under grade project I have done and want to make sure to get it right the first time around.
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