Most new fireplaces come with glass doors. But if you want to add this safety feature to an existing fireplace, retrofitting them isn't difficult. The doors come in standard sizes that fit in any flat firebox opening.
We asked Justin Calemmo, of Five Sons Chimney Service in Brookfield, Connecticut, to show how to retrofit new doors on an old fireplace. Our 1848 fireplace has a surround that's undersized, so the glass doors make it safer by blocking the fire from the too close wood floor and mantel.