Roberts understands installing a new flooring can be challenging. Here are some key product usage points regarding 1407 acrylic wood adhesive that may improve performance and satisfaction. (subfloor) - always prepare the subfloor to be structurally sound, dry, smooth, flat (≤ 3/16" within 10') and free of excess moisture/alkali and all substances (oil, debris, dust, paint, oil based sealers, adhesive residue, etc.) that may inhibit the bond of the adhesive or the performance of the flooring or its installation. Adhesive trowels ridges should be well defined, consistent and able achieve full coverage onto the back of the flooring and to the substrate. - always observe the appropriate amount of open time prudent to the installation conditions and trowel size. Do not allow the adhesive to skin over. If this occur, scrape off and re-apply. To ensure 100% transfer occurs to the back of the wood planks, lift a board occasionally to confirm. Roll the completed installation with a weighted roller, per manufacturer's specific instruction. - Customer Care