I have a sub floor, and then natural wood floors. The planks are pine about 8 inch wide. The floors are ruined from animals and just about anything that has touched the floor due to soft floor. I want to put a laminate over the floor. I do not want to remove the floor. I was told by the supplier that we could have load bearing issues with three layers of floor. The basically would not warranty the floor if I purchased. We have a crawl space under the home and concrete block bases under the home. I have never heard of load bearing issues. Has any one had this type of issue?