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RESUMO :  A procura por maior otimizacao do processo produtivo de edificacoes, relacionada a simplificacao e reducao de prazos de execucao e diminuicao da geracao de desperdicios, tem intensificado a utilizacao de sistemas construtivos industrializados no Brasil. De forma recorrente se verifica a disponibilizacao de sistemas de vedacao em drywall nos lancamentos habitacionais recentes. Por exigencia da NBR 15575 (ABNT, 2013) faz-se necessario avaliar o desempenho dos sistemas construtivos, tanto convencional como industrializado, considerando, entre outros, requisitos de sustentabilidade sob aspectos de durabilidade, manutenibilidade e adequacao ambiental. Dessa forma, os sistemas construtivos industrializados em drywall devem atender aos requisitos e criterios estabelecidos naquela norma. Nesse contexto, o presente trabalho teve como objetivo avaliar o consumo de energia e emissao de CO 2 de um sistema de vedacao vertical em drywall, tipologia 140/90. A metodologia se baseou na quantificacao de energia incorporada e emissoes de CO 2 , por meio da avaliacao de ciclo de vida energetico - ACVE e de emissoes de CO 2 - ACVCO 2 , respectivamente, nas etapas de fabricacao, transporte e manutencao do sistema analisado. Este trabalho procura contribuir com a maior conscientizacao do uso de sistemas construtivos racionalizados e, principalmente, mais sustentaveis ambientalmente. ABSTRACT : The search for greater optimization of buildings process production, related to simplification and reduction of lead times and reducing of waste, has intensified the use of industrialized constructive systems in Brazil. Repeatedly it is seem the availability of sealing system in drywall in recent housing releases. By requirement of NBR 15575 (ABNT, 2013) it is necessary to evaluate the performance of constructive systems, both conventional as industrialized, considering, among others, sustainability requirements under aspects of durability, maintainability and environmental suitability. Thus, the industrialized systems as drywall must comply with the requirements and criteria set out in that standard. In this context, the present study aimed to evaluate the energy consumption and CO 2 emissions of a vertical sealing system in drywall, type 140/90. The methodology was based on quantification of embodied energy and CO 2 emissions, through the energy life cycle assessment-LCEA and CO 2 emissions-LCCO 2 A, respectively, considering the steps of manufacturing, transportation and maintenance of the system. This paper seeks to contribute to increase awareness of the use of rationalized constructive systems and, especially, more environmentally sustainable.

Energia e emissões de CO2 de sistema de vedação vertical em drywall [Energy and CO2 emissions of vertical sealing system in drywall]