What does mill close-out mean here?

The sheets come from a mill run with minor appearance issues such as light color variation, paint inconsistencies or surface stain. They are sold as-is with no warranty.

Is 22 gauge better than 26 or 29 gauge?

Yes for strength. 22 gauge steel is thicker, so it resists dents and oil-canning better and handles wider purlin spacing than the lighter gauges common in big-box R-panels.

What is purlin-bearing about this panel?

The overlap section is wider and covers the adjacent panel completely, so the seam is stronger and less likely to leak than a standard R-panel lap.

How much area does one panel cover?

Net coverage is 36 inches after the overlap. Order by the square footage of the roof or wall and add for waste and trim.

Can the color variation be seen once installed?

On a large, flat, sunlit wall it can show as patchiness between sheets. On a barn or shed, or on a wall broken up by doors and trim, it is usually less noticeable.

What fasteners does it take?

Exposed fasteners, meaning washered screws driven through the flats. Use screws with sealing washers matched to the panel and drive them square so the washer seats without dimpling the steel.