Can you share pictures and or plans of what you are building?

Concrete is often used. What do your plans specify?

stamped & stained concrete will be little maintenance, but still look awesome

I used wood and painted it with floor paint. It looked great and was easy to keep clean.

Where is the house located?

Ours is brick. Pretty & indestructible

We used composite decking for the floors of our screened porch and our deck and are very happy with our choice. We live in red dirt country and have 2 big dogs who often have muddy feet. The floor just washes clean with a hose. Our porch is framed in aluminum so it is maintenance free, too.

We rented a house that had pressure-treated flooring for the screened porch and the deck. Maintenance of the outdoor lumber was on-going. Heat, humidity, rain, snow take such a toll on pressure-treated lumber.

Our builder installed screen between the floor joists and the porch floor to keep the insects out of the porch. Love the idea! In two houses we've had screened porches without the floor screen and had a lot of bugs that came in through the spaces between the floor lumber.