Quik Vinyl Plus 8.8 (rigid core, R-LVT) with PVC underfloor is an improved version of first generation LVT. Rigid core literally means the core is solid PVC It has more advantages, for instance dimensionally stable meaning that it will not expand and contract like traditional luxury vinyl floors do One of the benefits of rigid core and the underfloor too is it doesn’t take the “telegraph” minor subfloor imperfections. 100% Waterproof. The Quik Vinyl Plus can be installed in very big surfaces, without placing the expansion-joints. Ecologic The 5G profile is a supplement that “awards” this technologically advanced floor, to be laid without problems; in fact it can be used in most cases solving a lot “after sales” troubles.