Building With ICFs in a Fire-Prone Region
So, we are building a house and have started an ICF basement. We are considering continuing the main floor walls in ICF and possibly the roof since the cost of lumber has increased so dramaticly. We live in Central Montana. I like the idea of having an air tight house that would be fire and natural disaster proof for the most part. Anyway, our original house plan is not for ICF but for 2×6 wood wall construction. We are using Amvic blocks. I noticed the site has design software. Do we need an engineer to plan our changes and how expensive might that be? I’m interested in the roof system, but my husband is nervous about having concrete on the roof and the weight. He was interested in having a steel beam roof. I also mentioned that some people use SIPS for their roofs. Do you have any advice? Also, what are your thoughts on the R value of ICFs and would you need additional insulation?