Wood Planks
The care and maintenance for pressure treated and treated wood planks are much like the care and maintenance that would be performed on your deck. The best way to keep your table mold, mildew free, and in good condition is to keep it clean of leaves, sticks and debris. Also, you want to reseal the table every 5-10 years. You can purchase these sealants at practically any hardware store.

Recycled Plastic Planks
The nice thing about having recycled plastic planks is there is virtually no maintenance. The only thing that you need to be sure to do is to keep it free of debris to prevent mold and mildew. If there are spills or stains, a mild soap can be used or if you choose a simpler way, the garden hose or pressure washer is sufficient.