Substiwood, Inc. specializes in producing patented lightweight concrete products for construction and other applications. Their innovative fiber-reinforced concrete offers advantages over traditional materials, including being tough, durable, and sawable. The products can beautify homes, gardens, and parking lots, and are cost-effective alternatives to wood and conventional concrete. Substiwood's offerings include fireplace mantels, lawn edgings, corbels, cornices, and roof pavers. The company, established in 1999 and based in Milwaukee, Wisconsin, focuses on providing environmentally friendly, fire-resistant, and insect-resistant solutions for various construction needs.