Patent ID: 8381488

Claim:
A method to provide a floor with tight joints and improved sound absorption wherein the floor comprises floorboards for use in a floating floor system that are connectable with a mechanical locking system locking the floorboards vertically and horizontally, the method comprising the steps of: connecting the floorboards with the mechanical locking system; and gluing the floorboards to a sub floor with a flexible glue that allows some movement between the sub floor and the floorboard such that a semi floating floor is accomplished; wherein said connecting step includes connecting the floorboard with the substantially similar floorboard by inward angling and/or snapping-in to a locked position, inward angling being where a first edge of a first floorboard is pressed against an upper part of a second edge of a second floorboard and the first floorboard is angled down with an angular motion from either above or below, wherein the connecting step further includes mechanically vertically locking both the first and second edges of a floorboard against upward movement and mechanically horizontally locking the first and second edges together via a locking strip protruding horizontally from a lower part of the second edge and horizontally beyond the upper part of the second edge, so that the underside of the locking strip is parallel to the sub floor in a fully locked position.