Improvements in construction practices and reg's. have made new homes less prone to flood damage. But, a significant number of existing homes continue to be susceptible to repetitive flood losses. However, there are numerous examples that illustrate practical and cost-effective methods for reducing or eliminating the risk of a house being flooded again. This report explains methods for retrofitting a house to protect against floods. Chapters: intro. to retrofitting (RF); consid. for RF; elevation; relocation; levees; floodwalls; closures; sealants; protection of utilities; choosing a method; a guide to selecting architectural/engineering services and contractors; the Nat. Flood Insur. Prog.; forces: hydrostatic loads, hydrodynamic loads, impact loads, and wind loads. Photos.