Marmoleum W Plywood Subfloor
I have decided to use marmoleum in our laundry room, which is just a 2x7 closet with a side-by-side washer and dryer. The room is on the second floor of our house and we are using sheets of marmoleum rather than the click together kind. We have to rip the floor out of the laundry area because of water damage, and we are trying to figure out what subfloor to put down for the marmoleum. The marmoleum specs PDF from their website says what NOT to use, but it does not say what is best to use. I have a call into them, but have not heard back in 2 days and need to move forward with this.
My contractor has a piece of Marine pine plywood left from another project that he thinks we should use as a subfloor. I am wondering what others have used as a subfloor with marmoleum. One marmoluem distributor I got on the phone recommended to me using a hardwood plywood like birch instead of softwood like pine. Does this make a difference using hardwood vs soft, like pine? We are also wanting to use formaldehyde free plywood, which in our area is a bit hard to come by.
Although we don't have to worry about the wear and tear of feet walking on it, we do have to consider the weight and shifting that washers and dryers tend to do.
Thanks for your answers. I know this is a laundry room but I posted in kitchens because marmoleum seems to be used there an awful lot.