Below Grade by Jana L | Feb 25, 2022 | Glossary of Terms, Glossary of Terms -B, Uncategorized | 0 comments Refers to flooring installed in below ground areas such as the basement of a home. Solid hardwood cannot be installed below grade, whereas engineered hardwood can be installed below grade. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.