This bill is aimed at establishing a grant program to help prevent and repair damage to structures caused by a mineral called pyrrhotite. The bill, titled "Crumbling Foundations Small Business and Homeowners Assistance Act of 2019," authorizes the Administrator of the Federal Emergency Management Agency to award grants to states to assist small businesses, condominium associations, and homeowners in preventing, mitigating, and repairing damage to structures with pyrrhotite in their concrete foundations. States must apply for these grants and use the funds to reimburse affected owners for the costs of prevention, mitigation, and repair. Each grant awarded can be up to $20,000,000 per year for a period of 5 years, with the possibility of renewal for additional periods. The bill authorizes the appropriation of $20,000,000 each year from 2020 to 2024 to carry out this grant program.