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Welcome to Sonoma PolySteel, LLC.  We're committed to providing you with the best building materials you can use for the exterior walls of your next residential or commercial project. As a homeowner, do-it-yourselfer, builder, architect, engineer,  or commercial developer, PolySteel Insulating Concrete Forms (ICFs) provide you with a superior construction technology that delivers cost-effective, high-performance structures that are safer, quieter, more comfortable, energy efficient, structurally secure, and environmentally responsible than any building system available on the market today