How do I treat / maintain IKEA Platta wood patio tiles?
These tiles are made of Acacia wood, which is OK for outdoor use, but must be re-oiled every year.

Here is my suggestion for yearly maintenance:


To smooth out the roughness, hand sand with a high grit sandpaper (I would avoid using a power sander)
Thoroughly clean the area using a stiff bristle brush and water, with a small amount of a mild detergent soap
Allow the deck to dry completely
Apply a light coat of tung oil with a paintbrush, wait 30 minutes, and wipe the excess off with a clean cloth.