Shop for Building Materials at The Home Depot. The Pleasant Hearth Alpine Fireplace Glass Door is a decorative cabinet-style door with a high-heat, Black powder-coated finish that will add warmth and charm to your traditional masonry fireplace. The one-piece frame construction is designed to be mounted against a flat surface outside the fireplace opening. It has easy-grip handles, hidden damper-control knobs for airflow control, and thick, heat-resistant insulation. This fireplace door can assist in reducing heat or cool-air loss up the chimney by as much as 90%. Always keep mesh panels closed and glass doors open when fire is burning in fireplace. For masonry fireplaces only; not for prefabricated. Made in the USA.