How to floor a shed?

[NEPA]

I recently moved into a house and there is a detached shed - the house was remodeled but the shed was not. The flooring currently consists of layers of screwed-down plywood (some stripped) and carpet (?). It is unsightly and I use the shed for my lawn tools primarily, however it is large enough to park my car in (which I may, come winter).

What is the best method to remove the stripped screws? Buy bolt cutters, circular saw, drill through? Afterwards, is it the most cost effective to DIY floor it with bricks and concrete mix?

[Glenstache]

Try a screw extractor for the screws.
https://www.lowes.com/pl/Screw-extractors-Drill-bits-Power-tools-Tools/4294607735

Do you need to remove the existing plywood flooring? What is it screwed into, and is it strong enough to support a car next winter? What would the bricks and cement be placed on?

Pictures may help.

[NEPA]

Do you need to remove the existing plywood flooring? What is it screwed into, and is it strong enough to support a car next winter? What would the bricks and cement be placed on?

Pictures may help.

I do need to remove the plywood. I wasn't able to tear out enough to see what was under the carpeting, mostly because of the screws I couldn't get out. It looks like the plywood was just thrown down on top of the carpeting and screwed into the layer below. I can add photos in a couple hours. Thanks for the tip on the screw extractor!

[paddedhat]

Hey there, I'm going to take a few guesses. First, are we talking Northeast PA? Second are were talking about a shed that was built offsite and delivered to the house? The reason I ask is that most sheds in PA are done like that. They have a few things in common. They are all built on "sled runners" which are typically 4x4 treated beams that are the base. These allow the shed to be drug around, and slid onto the truck and into your yard. If it's a typical storage shed it would have 2x4 or 2x6 floor joists on top of the  runners (or skids) and then plywood screwed to that. If it's a garage built to support a vehicle, it will have more floor joists, spaced tighter, and two layers of 3/4" plywood on the floor. 

The reason for all this questioning, is that, if this is how your shed is built, them the whole "replaces it with a brick floor" concept confuses me. The only way that would make sense to me is if you somehow had a floor built with no structure under, and plywood laid directly on stones, dirt, etc..... which is certainly possible, but quite unusual.

[lthenderson]

The easiest way to remove screwed down plywood with stripped screws is to use a sawzall to cut through the plywood along side whatever material the screws go into and then once the bulk of the plywood is removed, to stick the blade underneath the strip of screwed down plywood that remains and cut through all the screws. The other way I remove all the unstripped screws and then just physically rip the plywood out using whatever means necessary and pull the remaining screws through the wood. Once removed, I just use a grinder to cut the screws flush.

I'm also puzzled at what kind of flooring structure you have in there now which will dictate what you will have to do in order to put a car in it later. Once you get the plywood out and can see what is beneath, I would repost with some pictures to get some useful information back.

[CptCool]

You can also chisel out some plywood around the screw, then use vice grip pliers to unscrew it. Or, you could use a dremel to notch a slot into it and use a flat head screwdriver to unscrew it. Both methods have been used by me many times successfully - I usually go with the pliers method as it isn't as loud and can be done with hand tools quickly