MP Doors is a fiberglass door brand operated by Nan Ya Plastics Corporation USA, a subsidiary of Taiwan-based Formosa Plastics Group — one of the world's largest petrochemical conglomerates. Headquartered in Houston, Texas, MP Doors leverages Nan Ya's decades of fiberglass manufacturing expertise to produce residential entry and patio doors. The vertical integration from raw materials to final assembly gives MP Doors a cost advantage that shows up at the register.

The product lineup covers fiberglass entry doors (3/4 oval lite, 3/4 lite, contemporary teak, narrow lite) and patio doors (French doors, vinyl gliding). All doors use high compression-molded fiberglass surfaces with composite edging, CFC-free insulating foam cores, and dual-pane insulating glass. MP Doors claims 6x better energy efficiency than traditional wood doors. The fiberglass construction resists rotting, rusting, warping, and delamination — problems that plague wood and steel alternatives.

MP Doors products are sold primarily through The Home Depot, positioning them in the mid-range value segment. Qualifying ENERGY STAR certified MP Doors exterior doors can earn the federal 25C tax credit — up to $250 per door, $500 total for exterior doors per year. For homeowners replacing old, drafty doors, fiberglass is the sweet spot between performance and price.