How heavy is a finished Solartex structure compared to regular filmcovering like Monocote and to fiberglass (what is the weight penalty for having a pretty plane)? Myself are about to start my biggest project so far by building a 25% Extra. For this I am brainstorming different options including what material to use for covering.

Some guys are chosing their materials according to the size of the aircraft, other to what type it is, while some are just stuck with either or.

The 25% has a wingspan of 72" .