I do not know about all FLW buildings but can talk about the ones in SW Pennsylvania - Kentuck Knob and famous Fallingwater. FLW paid a lot of attention to the

I do not know about all FLW buildings but can talk about the ones in SW Pennsylvania - Kentuck Knob and famous Fallingwater. FLW paid a lot of attention to the construction and durability but a lot of bad rep comes from two factors: one, those building in particular were built in the challenging environments: one on the top of the hill, one - built into the side of the hill, over the creeks. Another factor is that a lot of FLW ideas required quality craftsmanship. As an example, Kentuck Knob has a row of sunlights on one side of the building. As far as I remember they were not made properly at first and caused problems with water leaking in. But to me, none of this matters. Kentuck Knob is just such a lovely building, and Fallingwater... Fallingwater is a breathtaking masterpiece, there are no words to describe this feeling. During my first visit, I turned around to give it one last look and literally wept.