https://blackburnnews.com/midwestern-ontario/midwestern-ontario-news/2016/05/30/squirrels-cause-rectory-fire-cape-croker/

This is a very good example of the damage rodents such as squirrels in the attic or walls of your home or business can cause , Noises such as scratching or scurrying can indicate the presence of rodents in your structure, If your hearing these or other noises in your walls or attic the best solution is to call a professional wildlife control company to do an inspection of your building.