The compressed straw-based boards are produced by bonding straws with natural adhesive (or self-bonding), synthetic resin,and inorganic cementing material at room temperature or high temperature. Evon et al. [8] manufactured new thermal insulation fiber boards by thermo-pressing from sunflower mixed with proteins and lignocellulosic fibers, acting respectively as binder and reinforcing fillers in what could be considered as a natural composite. The result showed that the heat insulation properties improved with decreasing fiberboard density, and thermal con-ductivity of the least dense fiberboard was only 0.0885 W/(m K)at 25◦C. Mati-Baouche et al. [9] carried out a research to develop anew insulating bio-based composite made with chitos an and sun-flower’s stalks particles. Composites with a thermal conductivity of 0.056 W/(m K) were obtained with a ratio of chitosan of 4.3%(w/w) and a size grading of particles higher to 3 mm. These thermalperformances are competitive with those of other insulating bio-based materials available on the market. Panyakaew and Fotios [10]described the production of low density thermal insulation boardsmade from coconut husk and bagasse without the use of chemicalbinding additives. Both insulation boards have thermal conductiv-ity values ranging from 0.046 to 0.068 W/(m K) which were closeto those of conventional insulation materials such as cellulosefibers and mineral wool. Zhou et al.