What is the best non toxic insulation for a house?

Jude Smith
Updated: Sept. 13, 2021

My beloved builder recommends spray foam insulation. I do not want a toxic household. We are building on an island in Florida and the house is 12 feet off the ground. What materials can we use to insulate the ceilings and air spaces?  Additionally, what eco-friendly and human-friendly products are out there for wall insulation? Thank you 

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