Despite its fire-resistant qualities, there are only a handful of concrete homes being built in Sonoma County, Calif. Greg McDonagh, the contractor building the Willow Green Place home, hopes to change that. McDonagh, president of Roseville-based Savior Structures, said the high cost of traditional wooden frame construction now has made homebuilding with concrete a more viable option. In late 2006, he invented a concrete wall-forming system using special separators to create narrow plywood boxes for pouring concrete.
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