An Introduction to Insulated Concrete Forms - Fine Homebuilding
https://www.finehomebuilding.com/project-guides/foundations-and-masonry-work/insulated-concrete-forms-2
WEBInsulating concrete forms (ICFs) are panels or hollow blocks that are stacked, braced, and then filled with concrete. They are most commonly solid pieces of rigid foam, but some are composites of cement and other insulating materials. ICF walls should be seriously considered for any home built in a region subject to regular hurricanes.
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