The process of moisture absorption in bamboo is observed to follow the kinetics described in Fick’s theory (Kushwaha and Kumar 2010). The moisture absorption of bamboo fibers is observed to be 13 %, which is more than that of cotton, lyocell, viscose rayon, modal, and soybean (Erdumlu and Ozipek 2008). Bamboo fiber pro­vides a reservoir of moisture, which usually diffuses into interfacial regions and decreases the shear strength (Chen et al. 2009). The moisture absorption of bamboo epoxy composite is 41 % and when it is subjected to benzoylation, moisture absorp­tion decreases to 16 % (Kushwaha and Kumar 2010). The moisture absorption in bamboo fibers after 9 days of water immersion results in decrease in interfacial shear strength (IFSS) to at least 40 % (Chen et al. 2009). Bamboo possesses very high moisture content; green bamboo has 100 % moisture with innermost layers having 155 % moisture (Li 2004). Phyllostachys bambusoides; bamboo specie has moisture content of 138 %. Increased moisture absorption in bamboo/vinyl ester composite fibers leads to a decrease in IFSS. This reduction in IFSS is due to the fact that bamboo strips provide reservoir of moisture which diffuse to interfacial area and inhibit the hardening of composite (Chen et al. 2009). Moisture absorption in bamboo can be decreased from 41 to 26 %. Silane treatment also reduces the water absorption (Kushwaha and Kumar 2010).