Why do pre-finished baseboards have groove in the back?
#1
Member
Thread Starter
Why do pre-finished baseboards have groove in the back?
I was thinking about making my baseboard; however, I found that most if not all the pre-finished baseboards have a light groove in the back. What's the purpose of this groove? Do I need to duplicate this on my custom made baseboard?
Thank you.
Thank you.
#3
As I understand it there are several purposes... you generally nail on either side of the groove, not directly through the center of it... the groove helps reduce cupping, allows air movement behind the trim. In the case of casing, it allows the trim to be tipped inward when the wall surface is slightly proud, keeping the trim tight to the wall.
#4
Member
Thread Starter
I see. Thanks a lot. So, any suggestion on how I would go about creating the groove/relief with a router?