Line up an offcut of underlay and a floorboard with the architrave. Use a panel saw to trim the architrave at their combined height. Then, use a hammer and chisel to remove enough of the bottom of the architrave that the laminate will fit underneath it. Be sure to leave a 10-12mm expansion gap. Ensure the floor is thoroughly prepared and the underlay is in place. Then, starting at the left-hand corner of the wall where the door is, lay the first piece of laminate with its tongue edge against the wall. Move the board slightly so you can insert the necessary spacers between the board and both walls, in accordance with the manufacturer’s instructions. Line the next board up with the end of the first and press down to click it into position, maintaining the expansion gap to the wall with spacers. Continue along the wall until you can’t lay any more full boards, ensuring the line of boards is perfectly straight. To fill the gap at the end of a row, lay a full board down parallel with your previous row. Flip the board end-over-end so it is upside down with the groove edge still facing you but the other end touching the end wall spacers. Use a try square and pencil to mark a cutting g...