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BoltUSA, operating as Avalin Seismic Construction Co. in Southern California, specializes in seismic retrofitting and related services, including foundation bolting and house bolting, cripple wall bracing, soft-story retrofit, and other foundation work since 1991. The company also provides foundation repair, underpinning, shear walls, hillside retrofitting, chimney rebuilding, and gas shut-off valve installations. As an official California Earthquake Authority Earthquake Brace + Bolt contractor, they help eligible homeowners receive up to $3,000 toward seismic retrofitting and offer free inspections and cost estimates.
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