Saw another member's post about a gate which he replaced which kinda prompts this post.
When we bought our place PO had OSB doors on a corrugated metal add-on shed
(added on to the 12'x24' metal building that is my shop). Thing was he had the OSB sheathing on
the back of 2x4 framing. The water ran down the OSB, sat on the bottom rail and result was obvious.
One of my first projects was removing the doors, stripping all the OSB off which wasn't real hard due to
extensive rot, and repairing the 2x4 frames and re-sheathing the doors. Went to Home Depot and got
T-111. Primed it with double coat of prime (and paint) on all edges as well as front and back. Have done at least one re-paint. Exterior Latex Semi-Gloss to try to hold down mildew. Now just a few years down the road I have rot on both doors at the bottom strap hinges. I try to look at the edges of sheets for voids when purchasing but trying for flawless lumber these days means you haven't put anything on the cart.
Guess my point or question/s are:
Is it un-realistic to expect an exterior rated sheet good to hold up more than 5 yrs+- when primed and painted properly?
What are my alternatives in "man-made" Hardi-board sheet good?