The Glue down Solid Oak Flooring is under QC's testing. VIFLOOR will 100% make sure the flooring are qualified before shipment. We know details matter! Glue down Solid Oak Flooring will be a very protential solid oak products for the market in the near future, it is much stabler than traditional solid hardwood flooring; it can be glue down, it can be nail down; the supply is sufficient than solid oak flooring at this stage.