About Masonite International
Masonite International is one of the largest door manufacturers in North America, producing interior and exterior residential and light commercial door products from operations across the United States, Canada, and internationally. The company traces its origin to 1924 in Laurel, Mississippi, where William Mason — inventor of Masonite hardboard — founded the enterprise. After decades of evolution from hardboard manufacturing into door specialization, Masonite was acquired by Owens Corning in 2024 and now operates as a subsidiary of the building products group.
The Masonite residential product line spans interior molded hollow and solid core doors across a wide range of panel profiles, as well as exterior fiberglass and steel entry door systems available under the Masonite, Homestead, and Fiber-Classic brand identities. Products are distributed through national home improvement retailers (The Home Depot and Lowe's are primary channels), regional building material distributors, and millwork dealers. The company's supply reach makes Masonite doors among the most widely available at the point of purchase for contractors and production builders.
Exterior entry door systems from Masonite are available as fully assembled prehung units with pre-bored hardware preparation, factory-applied primed or painted finishes, and pre-installed weatherstripping. Fiberglass door lines offer woodgrain surface textures that accept exterior stain. For production builders and contractors working at volume, Masonite's distribution infrastructure, broad SKU availability, and retail channel presence make it a primary sourcing option for both interior and exterior door programs.
Company Snapshot
Product Lines
Interior Molded Doors
Hollow core and solid core interior doors in a wide range of flush, panel, and specialty profiles for residential and light commercial applications.
- Hollow core and solid core construction
- Smooth, textured, and woodgrain surface options
- Standard and custom sizes
- Pre-primed for field painting
Exterior Fiberglass Entry Doors
Fiber-Classic and Masonite fiberglass entry door systems offering wood appearance with lower maintenance requirements.
- Smooth and woodgrain surface profiles
- Stainable and paintable fiberglass skins
- Prehung systems with frame and weatherstripping
- Coordinated sidelite and transom options
Exterior Steel Entry Doors
Steel entry door slabs and prehung systems for applications where impact resistance and security are primary criteria.
- 24-gauge and heavier steel face options
- Polyurethane foam core insulation
- Factory-primed for field or factory finish
- Available as prehung units or slabs
Common Applications
Production Residential
High-volume new home construction where consistent supply, competitive pricing, and broad SKU availability are the primary sourcing criteria.
Home Improvement Retail
Replacement and renovation projects sourced through The Home Depot, Lowe's, and regional dealers where Masonite products are stocked for immediate purchase.
Light Commercial
Small commercial and institutional projects requiring hollow metal or solid core interior doors with documented fire ratings.
What To Know
Widest retail availability
Masonite's presence in national home improvement retail channels means products are stocked locally for immediate purchase — important for replacement and repair projects.
Broad interior door SKU depth
Interior door panel profiles, sizes, and constructions from Masonite cover more of the residential specification matrix than most single-manufacturer alternatives.
Owens Corning building envelope integration
Parent company Owens Corning's insulation and roofing portfolio creates potential for coordinated building envelope sourcing across product categories.
Editorial profile based on Masonite International public product and company materials; last reviewed May 2026.