The wood frame will be screwed and glued together.
To line the tank, I'll be using a paint on liner material called
permaflex. It says it holds up to 250F temperatures. It is also less expensive than a pond liner like Gary used on his tank. We'll see, but I think it might also be easier to install as well. One person who submitted his project to
builditsolar is using it. I've tried to contact him to verify that its all working well for him, but haven't gotten a reply.