If you do a snap lock type floor like the Home Depot Lifeproof flooring be sure to use the little kicker or whatever you call it to close up the gaps. I did not do that in my basement bathroom and it sure looks like a bad DIY job. I need to pull the toilet and redo the flooring. It is less than 30 square feet. I will reuse the pieces, but I have extra if need be. I was in a huge hurry to finish the bathroom for a real estate appraisal so I left it the with the gaps. (No appraiser would include the basement bathroom in my house value because it was trashed and unusable. The toilet flushed, but I would have gone outside before using it as it was NASTY.)