Benefit-Cost Ratio Analysis of Single Pitch Roof Houses in Kwitang, Jakarta-Indonesia
The benefit cost ratio is most often used to translate the relationship between possible benefits and costs, both quantitative and qualitative, of undertaking new project or replacing old ones. The benefit cost ratio analysis allows an entity to decide whether or not the benefit of given project outweigh the actual costs that go into the creation of the project. This paper is related to the previous research about the variation degrees of single pitch roof for saving energy consumption in densely populated region, but the focus in this sub research will be about the comparison of the benefit cost ration between the two models. Kwitang was selected to be the case study due to its representation of one of the oldest slum and densely populated area in Jakarta. Data were collected by interviewing randomly for selected 50 households from survey. This paper will present the analysis of potential cost savings in energy consumption of a model single pitch roof and its comparison with the existing condition. By replacing the existing asbestos roof material into clay roof tile with a certain slope, it can improve the health and comfort of people who live in. Benefit cost ratio analysis would provide suitable result of chosen model of the single pitch roof. The study revealed that B-C ratios of single pitch roof with 30 degrees is 2.59, 20 degrees is 2.64, and 10 degrees is 2.76. The best roof slope with great value B-C ratio is 10 degrees. These positive values indicates the fact that investment of single pitch roof is a profitable venture and worthwhile.
Keywords- Benefit Cost Ratio, Single Pitch Roof, Energy