I have a hardwood -stained- conservatory- with bifold doors and I need to add another piece of timber (with drip return) above the doors to stop water running down the facia and onto the door track below. (I think this is a design fault but the installation company are no longer around)
What should I fix the new piece with?
1. Tacks - should I use stainless?
2. Screws? or
3. Glue, what type?
or combinations of the above?