A: Any kind of nails will work. For my house, they used “Steel Panel board nails” (the search term to use for the Home Depot site, they come in several colors) For my shed I used 1-5/8” brown exterior rated screws. I stained the wood a medium brown and the screws blended in perfectly. I prefer non-galvanized so I don’t need to worry about stains, paints, or finishes interacting with the fastener coatings. Whether you opt for nails or screws, it doesn’t matter if you put the fasteners in the grooves or not, it is purely aesthetic. If you use nails make sure to use ring shank nails so they don't work loose.
A: I used screws. I screwed into the joints where possible as well as into other areas of the panels.
A: Fred, The weight of the T1-11 siding is an average of 57 lbs.
A: Shari, We do not recommend installing T1-11 siding horizontally as the moisture and rain will collect in the grooves and cause delamination.
A: Melinda, We do not recommend using siding as flooring as it is not a structural product.