The answer to 'rat scratching sounds' is that these noises are a common sign of a rat infestation in your home. Rats make scratching, gnawing, or scurrying sounds as they move around, nest, or look for food. The sounds are often heard in walls, ceilings, attics, or other hidden areas where rats are active.
Some common causes of rat scratching sounds include rats nesting in insulation, chewing on wood or wires, or moving around inside walls or floors. You may also hear sounds of rats climbing, digging, or dragging materials as they build their nests. Seeing droppings, rub marks, or other signs of rodent activity can also indicate a rat problem.