I recently posted a question about using peel and stick tiles on chipboard substrate as a temp fix. I started to write this as an answer to that questions, but realized that my answer was becoming far more general than my question.
Situation: Toilet tank cracks, dropping about 10 gallons of water on the floor before discovery. Most of the water went into the joist space, but some made the hall carpet and foam underlay soggy.
I immediately ripped up the carpet and underlay, vacuumed the loose water, and set a fan to dry the area. I have minimal swelling of the porridge board.
This hallway area is in a loft with balcony overlooking the great room, and two bedrooms. We want to redo all of the flooring on this level. My work is seasonal, so doing it now isn't practical.
So I need a temporary floor covering until the time comes to do the great reno.
A similar situation arises if you buy a 'handyman special' house to fix up. Often a workable temporary solution can help turn a barn into a house.
Best Answer
I'm going with paint.
Research elsewhere on the net found some interesting stories about people putting down a new floor after a P&S floor. Getting the old tiles up, and removing the glue was a serious PITA, right up there with older style glue down floors.
So...
A "Temporary" floor should be done in such a way that it is easy to remove, or can be covered over when comes the time to replace it. To that end I rate the following as reasonable temp floor solutions:
Do nothing
Downsides:
Paint it.
Downsides:
Paint could be augmented with some form of filler first to make it smoother.
If the floor is a the really cheap sawdust board, there is merit in using a non-waterbase primer.
Also: If you can, use recycled paint. No point in using expensive paint for this.
Carpet Runner / area carpets
Downsides
A variation on a theme: If you can access used carpet, cut a chunk to fit, and as a temp covering, staple it in place.
Another variation: If your area run doesn't do the whole area, paint first, then the area run.
Laminate flooring & Vinyl Plank flooring.
This is close to a permanent solution, but for a temp solution you may want to use whatever is cheapest at The Orange Box, and take shortcuts in the installation, such as duct tape transition strips, and being less attentive to detailing. May make sense if the temp area is small compared to the entire area you will be doing.
Loose lay vinyl.
Another more permanent temporary solution. This is a form of vinyl flooring stiff enough to just lay on the floor. I've used it in a bathroom 12 years ago, and it has worked well for me. But even cheap vinyl can be stapled in place.
This is, I think, the best solution for a bathroom, especially if the existing subfloor is one that can be easily water damaged.