Hello,

In paying attention to the details of stickering you will be successful having no unwanted long term effects and much of what that success entails has been mentioned. The only thing I will add is that the stickering wood must be softer, less dense, lighter - you get the idea - than the wood you are stacking. In most cases then fir is good. On no account use composite wood based materials.

Greetings,

Don Wagstaff