Check Consumer Reports at the library. Either use composition material
review by them or double thickness planks of treated lumber. I will use
composition boards for my next deck.


"William W. Plummer" wrote in message
news
A friend had a porch built about 10 years ago. The contractor used
pressure treated lumber but now, the wood is warping an cupping. I need
to replace it to make it safe to walk on. Also, the contractor nailed it
rather than screwed it together so the nails are working their way out.

What type of wood should I use for the replacement? I'm looking for no
rotting and no physical changes.