I’ve seen this a few times now and have written it up. I see nothing in James Hardie’s installation manual that says the butt ends of a plank can be left open. This product is not vinyl and we don’t know what will happen if water gets behind it…there is no assurance it will drain like vinyl. You guys have any comments? I wrote it up as being inconsistent with the manufacturer’s installation instructions.
Vinyl corner trim (ends of planks visible and not sealed).
Snippet from instructions