Since it is covered and assuming you are in Texas with lower rainfall averages, I think running parallel would be fine. If you wanted to be anal about it, you could knotch out the tongue every foot or so about 1/2" long or so as drainage ports, but I don't see that as being necessary.

Hi Folks- This site is awesome and I sure hope this isn't a duplicate posting. I have been lurking out here for years but finally jumped in. I am planning to install T&G Ipe on my screened porch. The porch walls were built over the original decking and it is in good shape. The former owners of our house installed carpet over the decking and it has worked fine. I would like to be able to install the T&G ipe over the existing PT wood perpendicular to how it is running today. If I can't do that would love some ideas on how to remove the old deck the runs underneath the walls. Thanks in advance for the help! Jim

I try to go as wide a tread and low a riser as possible, but it is all dependent on where they are located and how much room. The wider the tread, the more run you have taking up space. 16-1/2 inch wide treads would be extremely comfortable if you have the room, imo. The widest i've done is 14-1/2" and it was fine.

spamming: sending the same message indiscriminately to (large numbers of recipients) on the Internet. Think I'll stop contributing to this discussion group as the intent of my contributions are being misinterpreted.