Question: Secure backing board of barn door to frame.
Options:
Spread rubber cement on the back of the frame, and place wood slats next to each other until the frame is covered.
Spread wood glue on the back of the frame, and place wood slats next to each other until the frame is covered.
Answer: Spread wood glue on the back of the frame, and place wood slats next to each other until the frame is covered.