When you want the work done right by experienced and reliable professionals, one call to Erie Niagara Masonry, formerly Mr. Sweep is all you'll need. Erie Niagara Masonry is a full-service chimney sweeping and repair company. At Erie Niagara Masonry, we pride ourselves on our professionalism and seasoned experience. All of our techs are highly trained and certified chimney specialists who have spent years learning and applying their expertise to the profession.