Do deck boards need to be pressure treated?

Similarly, should deck boards be pressure treated?

Pressure-treated lumber is the logical choice for the structural part of your deck—the posts, joists, beams and other members you normally don't see. Pressure-treated lumber can support more weight and span longer distances than cedar, redwood or other woods commonly used for building decks.

Secondly, can I use untreated wood for deck? Yes, you can use untreated pine outdoors but you shouldn't make it your first choice. Pressure-treated pine is going to hold up against the elements much better. Treated pine, however, can be a great solution for other outdoor projects including decks or even fences.

Beside above, do you need to seal cut pressure treated wood?

Use Cut-N-Seal^® on areas that have been drilled or saw cut in treated wood deck boards, railing, post tops, fence boards, etc. Cut-N-Seal is not recommended to replace pressure treatment. Do not use to recoat pressure treated wood surfaces.

How long does pressure treated wood deck last?

15 to 20 years