We have a house build in the 50's with a basement heatolator firebox. The box itself is rusted and water is leaking through the flue. We have made sure it is not coming from the chimney. A water test shows it coming from ground water. In the meantime we have addressed the normal gutter/drainage issues. As of right now very little water gets in. The house is a stone house and the foundation in this area is stone. The fireplace is not useable nor do we even need a fireplace in that location. I am wanting to know if it is possible to just close the opening up with blocks and 'forget' there was a fireplace there? If so, who would do this type of work? Thank you, Vicki