Glue Down Installations are considered to be much easier than the nail / staple down hardwood floor installations. The glue down method can be done as a Do-It-Yourself Installation by most home owners, by simply following the installation instructions. The greatest advantage of a Glue down installation is that it can be done on any sub floor. Unlike the Staple / Nail down method, which can only be done on a wooden sub floor. You can install the hardwood floor directly on a concrete slab or on tile, ceramic or plywood underlayments. Glue down installations are pretty much limited to Engineered hardwood. We strongly recommended not using the glue down installation method with solid hardwood floors, for the glue will limit the woods ability to expand and contract. Thanks to the multi-layered structure of engineered hardwood, it can be installed using the glue down method, making it fast, easy and cost effective.