Can anyone please tell me if bamboo that has been treated to withstand water, is kosher to be used as schach? I've heard divergent opinions. Many thanks and G-d bless.
The issue with materials that are "treated to withstand rain" would be if gezeirat tikra (no differentiation from a roof; see Sukkah 14a) applies to it. Some are of the opinion that only material that are structurally similar to a roof (e.g. wide planks of wood) are subsumed in this gezeirah (see responsa Shaarei Yosher 1:28 and works cited there). As indicated in the question, there are different opinions and so one should consult their LOR.