A: This product is sturdy but i know from experience that it will begin to bow without some support every 2 feet or so. I have some shelves i made and put an oak edging on it and they span about four feet. After a years or so they started to sag in the middle, so i would put some support every 2 feet or so if there will be any significant weight on it. My shelves have books on them so there is a bit of weight there.
A: Hi Randy - MDF is not suited for use in underlayment applications. Thank you for the question!
A: Hi Lottie - We recommend a plywood or OSB panel for this application. Thanks for the question!
A: A wooden subfloor will never be as good as a tile backerboard version for a kitchen.