This study examines the cost-effectiveness of convering flat-roofed buildings to sloped-roof buildings as an alternative to repair or replacement of the existing roof. Projects were located, and designers, contractors, and owners were interviewed. This report includes case studies portraying methods, systems, materials, and costs for this type of reroofing. Converting flat-roofed buildings to sloped roofs proved to be a viable alternative to reroofing. This method was cost-effective when considering the life-cycle costs, particularly for smaller buildings. Sloped-roof conversions are being done in most areas of the country, regardless of geographic area or climatic region. Finally, this type of conversion often had the benefit of enhancing the appearance of the buildings and solving other problems associated with flat-roofed buildings.
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