Buildings generate millions of tons of greenhouse gases, toxic air emissions, water pollutants and solid wastes that contribute to negative environmental impacts. Life Cycle Assessment (LCA) is a methodology for assessing the environmental performance of products over their life time. However, many building products are discarded much before the end of their service life, especially as a result of refurbishment and renovation projects. The need for such projects is increasing because most buildings are not designed to accommodate changes in their functions and needs of their occupants. This is particular to commercial buildings, especially hospitality facilities, which are unique with regard to operational schemes and the type of services offered that are highly resource-intensive. In this investigation, statistical data related to refurbishment and renovation projects in Turkey were analysed to determine the percentage of refurbishment projects for hotels. Bills of quantities for refurbishment projects of three five-star hotels in Ankara were obtained and evaluated with regard to the volume and type of material discarded as a result of the renovation works. ATHENA, an LCA software, was used to evaluate these projects according to the six environmental impact indicators: primary energy consumption, solid waste, air pollution index, water pollution index, global warming potential and weighted resource use. A system was formulated for evaluating materials according to each indicator by calculating their &ldquo / eco-scores&rdquo / the total score is considered to be the yard-stick for comparing environmental appropriateness of these materials. Finally, recommendations on the choice of materials were made, with an aim to reducing material waste and harmful emissions.

O setor da construção civil apresentou grande crescimento nos últimos anos. Nesse período, surgiram novas exigências tecnológicas, organizacionais, normativas, dentre outras. Além disso, as necessidades dos usuários vêm sofrendo mudanças devidas ao desenvolvimento sociocultural e econômico. Assim, muitas edificações por não atenderem às necessidades contemporâneas e têm passado por reformas para se adaptarem às novas exigências de uso. Por isso, o mercado de reformas também tem apresentado crescimento expressivo e, com isto, atuar nas pequenas reformas têm se mostrado um ramo promissor para o segmento da construção da construção de edifícios. O cenário atual mostra que as atividades de reformas têm recebido maior investimento que as novas edificações, fato que é observado em diversos países europeus, incluindo Portugal, cuja cultura é muito próxima à brasileira, o que corrobora com a ideia de que deverá haver incremento nessas atividades também no Brasil. Não obstante as perspectivas de crescimento, a atuação profissional do autor, envolvido com várias reformas, tem mostrado que esse ramo tem sido dominado pela informalidade e por atuações pouco ou nada técnicas e, por isto, tem enfrentado inúmeros problemas devidos a atrasos, orçamentos inapropriados e qualidade de serviço aquém das expectativas do contratante. Buscando reverter este cenário, o objetivo deste trabalho é propor diretrizes para a gestão do processo de reformas de edificações. Para tanto, empregou-se como método de pesquisa o design science research, juntamente a revisão bibliográfica, entrevistas com empresas do ramo, enquete com síndicos de condomínios e estudos de caso; os quais permitiram ao autor identificar as ineficiências e dificuldades de gestão de obras de reformas de pequeno porte. A partir das informações adquiridos foram elaboradas as diretrizes para a gestão do processo de reformas. O autor as aplicou em um estudo de caso, o qual apresentou resultados favoráveis, mostrando a eficácia de sua aplicação e os benefícios. / The civil construction\'s sector presented a huge growth in the last years. In this period, new standards, technical, organizational and other requirements were elaborated. Besides that, users\' necessity has been changed due to variations in the culture, social, economic and development. Then, because many buildings do not attend actual requirements and a refurbishment is necessary to adapt for new users\' demand. So, refurbishment market also presented a significant growth and work with small refurbishment seems to be promising market in civil construction sector. The actual context shows that refurbishment is receiving more investments than new buildings, as noted in many European countries, including, Portugal, which has a culture next to that one from Brazil. Regardless of this increasing perspective, actor\'s professional experience, involved with many refurbishments, have been showing that it is dominated by informality, and less or no technical approaches, and because of that, it is leading many issues with delays, inappropriate budgets, and low quality of the works. Looking for changes in this context, this research aims to propose guidelines for refurbishment procedure\'s management. So, design Science research was used as method, combined with bibliography research, interviews with companies\' managers in this business, surveys with syndics from buildings and cases; which allow the actor to identify inefficiencies and difficulties in project\'s management in small refurbishment. Based on that, the guidelines for procedure\'s management in refurbishments were proposed. This actor applied them in a case, which showed good results, revealing its efficiency and benefits.