– Measure the width of your fireplace.
– Using that measurement, divide it into three equal parts and cut a piece of wood flooring to fit each part. Nail these pieces in place on either side of the firebox opening with finish nails every 12 inches or so using a nail set tool to make sure they are flush with the subfloor surface. For larger openings you may need more than one row of boards depending on how far apart they can be nailed without showing on top due to sagging between nailing points – typically 18″ centers is good for this type application but always best to check with supplier before buying new materials as different manufactuers have slightly different standards/specs for their products which might require differing installation methods/practices.
– Use the same technique to cover the area of hardwood flooring around fireplace hearth/opening as well with pre-finished material if it is already finished on all four sides or unfinished wood which you will finish yourself after installation with matching color stain and protective topcoat for wear protection unless your subfloor surface has been painted previously in which case, use a high quality primer first followed by painting before installing new flooring boards.