What is the best flooring for an all purpose workshed?. One of the pre-fab barn style sheds you can buy most anywhere? This shed is mostly for her and I will use it as required.

This shed floor will have to breathe, be able to take a lick, and be functional for household projects but look good enough for the boss lady to do projects in too.
Those sheds sit on blocks, so air will be under it. I got one that is used for storage and the floors in it are not as tight as I would like. So sealing up the joints is required. This shed will have window unit ac and ceiling fans, heat will be as needed with portables.

So what flooring will work best and be reasonably affordable and fast to install?

I’ve used the luxury vinyl plank in this exact application, it’s still looking good after a couple of years.

We used OSB in one like you are describing. It will need a dehumidifier.

I did a roll of the thick vinyl. Easy to clean and put down. I did it before building interior walls.

That looks about like what I had in mind and the roll stuff patterns are probably something she will be satisfied with picking from.

Get the good, thick stuff.

10 millimeter I'm guessing? they got thicker stuff for commercial use.

Either roll vinyl or lvp

We just ripped up a bunch of carpet in the house and had LVP put down. Didn't think I'd like it but it looks great, was easy to put down and didn't take long at all.

Sounds like a loose lay sheet vinyl is what you're looking for. If you decide to glue it down get a pressure sensitive glue and let it flash before you fold the vinyl into it. If you are looking for a vinyl plank get the lifeproof 23 mil lvp at home depot. You can normally find a sale on a few different colors for $3 sq ft. It'll last forever.

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Snap together vinyl tile it comes in various sizes 12" x 24" is common. Easy and fast to lay. Holds up well.

Fancy

If my wife see's that high end snap together stuff I'm gonna ban somebody around here. She loves to see me fight with crap like that.

do some cheap ceramic tile

Why?

it's a good hard surface that looks good and could be done cheap and wouldn't get anyone banned.

We spray foamed ours and just left the wood floor…

Tile on a that kind of shed floor wont work for long. Those pre-builts do flex enough over time to pop the floor tiles. Everything I have read says dont do it. Plus if you bump them too hard with a lawn mower or bigger vehicle you will break something. It sucks if you bump them off level, after being good anchored on set locked on hard blocks and then you have to get it back on level with just car jacks.

I'd just go with the Vinyl. Give em the measurements and have em cut and lay her down! Not sure on your width, ya might have to have another piece, but you can handle it 😁 It's what i have all through my little shack at camp and it's fine, hell it's 13 years old and folks still thinks its real wood at first glance lol. Now my little lofted barn at home is half carpet and the other is some kinda "more expensive" flooring i paid for at the time, which don't seem bad now, cause this building at home has tripled in price (along with my carports here and at camp) in the last five years 😳