Hi can any one help we have recently moved into a new property where downstairs there is a large long lounge about 9ft x 25ft that used to be two seperate rooms.We want to lay laminated flooring in this room but on removal of the old carpet we have discovered where the two used to meet there is a large slab of concrete which i presume used to be an old fireplace and on both sides of this the floor drops down by 1 to 2 inches does anyone know how we can try levelling this up so its level in the whole room?