Remove the tiles over the damaged area of the subfloor.
Wet subfloor under vinyl.
If it is easy to pull up your subfloor has too much moisture for vinyl.
Leave the vinyl in place for 72 hours.
Keep this process going until moisture is gone.
After 72 hours pull the tape off the floor.
Moisture weakens glue bonds and causes the edges to lift and.
The key is to isolate the area to use the dehumidifier followed by circulating air using the fans.
Remove a few boards to let the others expand and dry the subfloor.
Chip off ceramic tiles using a masonry hammer and cold chisel.
Vinyl flooring can either be glued to the subfloor or it can float on top of it and either way moisture underneath it causes problems.
Concrete subfloor test the floor for moisture.
It is generally made of inch plywood which is quite strong until water is allowed to sit on it.
Seal in the edges so no air can escape.
Another option is to tape a piece of your vinyl flooring to the concrete for 72 hours.
Tape a 3 foot square piece of scrap vinyl to the concrete with duct tape sealing the edges tight.
Test the moisture content of your concrete subfloor.
You can do this with a moisture meter ensuring that your reading is no more than three pounds per 1 000 square feet per 24 hours.
When wood floorboards get wet they swell.
As the name implies your sub floor is the flooring that sits underneaththe floor you have on top e g.
Pry off linoleum or vinyl tiles with a putty knife using lacquer thinner to dissolve the tile adhesive.
Carpet vinyl laminate etc.
Water damaged vinyl flooring is often unexpected.
Another way to measure the moisture in a concrete subfloor is to tape a piece of your scrap vinyl to the floor using duct tape.
In an area such as a kitchen or bathroom sheet vinyl flooring and water are generally a good match.
However equipped with a dehumidifier and some fans it is easier than you think.