Collection of selected, peer reviewed papers from the 15th International Conference on Non-Conventional Materials and Technologies NOCMAT, November 23-25, 2014, Pirassununga, Brazil. The 51 papers are grouped as follows:Chapter 1: Natural Fibers, Bamboo and Plant-Based Materials; Chapter 2: Non-Conventional and Innovation Research and Technology; Chapter 3: Construction Materials and Technologies for Sustainability, Energy Efficiency, Affordable Housing; Chapter 4: Recycling of Industrial Materials, Agricultural and Urban Waste