Development
The ICF construction technique was first developed in Europe following the second world war as an inexpensive and durable way to rebuild damaged structures. The first modern ICF forms were developed in the late 1960s with the advent of modern foam plastics. Canadian contractor Werner Gregori filed the first patent for a foam concrete form in 1966 with a block measuring 16 inches high by 48 inches long with a tongue-and-groove interlock, metal ties, and a waffle-grid core.
The adoption of ICF construction has steadily increased since the 1970s though adoption has been hampered by lack of awareness, building codes, and confusion caused by many different manufacturers selling slightly different ICF designs rather than focusing on industry standardization. Data from the National Association of Home Builders shows 48,000 ICF homes and 10,000 to 15,000 commercial structures were built using ICF in 2002. Since 2002, sales of ICFs have increased 30% annually. ICF construction is now part of many building codes and accepted in most jurisdictions in North-America.
Read more about this topic: Insulating Concrete Form
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