Just about finished installing LVT in our 1998 Dutch Star. I didn’t like the condition of the OSB so installed a new subfloor on top which is glued and screwed down .
The best price was for some cabinet grade Birch from Windsor Plywood.,it’s is a little thicker than 1/8 inches. The LVT is about the same so combined about the same thickness as most of the Laminates that many people have installed.
The LVT is held in place around the edges by an adhesive that stays Tacky! Also used wherever the Slide out Rollers contact the finished floor! Every where else the Tiles 12X24 are loose laid .
So far so good and a vast improvement over the Old Carpet.. We did not do the slide but likely will do that next.