Luan doesn't last long in our weather up here. I looked for a photo on my computer of the mess it created here, but I couldn't find it. Problem is the stuff delaminates something awful. I used the stuff for some of my hive/nuc entrance tunnels. I made them 9mm wide to start with and before long the dang luan started to delaminate and closed the things down to 5mm, and less. A good queen/drone excluder/includer!