National Door and Trim
- Company typePrivate
- Founded1967
- HeadquartersVan Wert, United States
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What National Door and Trim does
National Door and Trim is a privately held, family-owned building products manufacturer and distributor headquartered in Van Wert, Ohio, with a second production facility in Lexington, North Carolina. Founded in 1967 as Turnwald Construction Inc. and rebranded to National Door and Trim in 1978, the company produces pre-hung, pre-finished, and fully customizable doors, frames, hardware, and moulding products for the commercial and residential construction markets. Its core technology centers on an automated finish line system (developed from founder Tom Sr. Turnwald's design) that delivers factory-applied finishes at a capacity of over 1,500 pre-hung doors per week, supported by over 150,000 square feet of production and warehousing across three locations.
The company operates a single-source supplier business model, bundling Division 6 (doors and frames), Division 8 (openings), and Division 10 (specialties) scopes into integrated packages for multi-family, student housing, and senior living developers, complemented by a residential channel at ndtresidential.com. Revenue is generated through project-based hardware and millwork sales with dedicated account managers; no public pricing or subscription model is disclosed. Distribution is direct via field sales and a structured pre-qualification process for new commercial clients and installers. The company holds long-standing vendor partnerships with leading manufacturers including Masonite Architectural, Allegion, Assa Abloy, Schlage, Ceco Door, Steelcraft, ThermaTru, and Metrie, which underpin its product breadth. Ownership and leadership remain with the Turnwald family across three generations, with operational executives including a President, COO, and a CFO with 34 years of tenure.
National Door and Trim firmographics
Firmographics- Name
- National Door and Trim
- Legal name
- Turnwald Construction Inc.
- Website
- https://national-door.com
- Company type
- Private
- Founded year
- 1967
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Ownership category
- akta.pro rank
National Door and Trim industry classification
Industry- Product category
- Building Materials Manufacturing
- NAICS
- Metal Window and Door Manufacturing (332321), Wood Window and Door Manufacturing (321911)
- SIC
- Metal Doors, Sash, Frames, Moldings & Trim (3442)
- akta.pro primary industry
- Commercial & Industrial Doors (Sectional, High-Speed, Fire, Security) (IMADAIAF)
- akta.pro secondary industries
- Interior Doors (IMADAIAB), Exterior Doors (IMADAIAA)
Keywords
Where National Door and Trim is headquartered
LocationHeadquarters
- HQ city
- Van Wert
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
National Door and Trim business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Infrastructure, Personnel, Technology or R&D, Marketing or Sales
Revenue model
- Commercial Door and Hardware Sales: One-time product sales of commercial doors, frames, and hardware to developers and contractors for multi-family, student housing, and senior living projects. Revenue generated through project-based transactions with Division 6, 8, and 10 product categories.
- Residential Door and Moulding Sales: Product sales of interior doors, exterior doors, and moulding for residential construction and renovation projects.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels3 records
National Door and Trim product offering
Product offeringCore offering
National Door and Trim is a manufacturer and supplier of pre-hung, pre-finished, and customizable doors, moulding, frames, and hardware for commercial and residential construction. The company acts as a single-source supplier delivering complete Division 6, 8, and 10 packages for multi-family, student housing, senior living, and single-family residential projects. It operates manufacturing and stocking facilities in Ohio and North Carolina, producing over 1,500 pre-hung doors per week with factory-applied finishes.
Product overview
National Door and Trim is a building materials supplier serving multi-family, student housing, and senior living markets. The company offers a comprehensive portfolio of door and moulding products through five core categories: Commercial Products (architectural doors, hollow metal doors and frames for Division 6, 8, and 10 needs), Interior Doors (molded and solid wood options), Hardware (commercial-grade and residential-grade), Exterior Doors (fiberglass and steel entry systems), and Moulding (hardwood, softwood, and MDF). They position themselves as a single-source supplier offering pre-hung door assembly, custom finishing, and inventory storage capabilities across over 150,000 square feet of facilities, producing over 1,500 pre-hung doors per week.
Differentiator
Problem solved
Functional benefit
Products and services
- Architectural Doors Wood commercial-grade architectural doors including flush doors, stile and rail, laminates, and impact-resistant options, built for demanding commercial environments.
- Hollow Metal Doors and Frames Durable hollow metal doors and frames in various gauges with fire ratings, glazing options, and custom borrowed lite designs for commercial applications.
- Molded Interior Doors Economical hollow and solid core molded interior doors available in paintable surfaces with bifold, modern, and barn door configurations.
- Solid Wood Interior Doors High-grade solid wood interior doors in paneled and glass configurations, available in stock or fully custom species, styles, and sizes.
- Fiberglass Exterior Doors Insulated fiberglass exterior doors with smooth or woodgrain textures, reinforced lock areas, and various panel and glass designs.
- Steel Exterior Doors Strong and affordable steel exterior doors with high-definition profiles, typically supplied as pre-hung units with sill systems ready for installation.
- Hardwood Moulding Natural wood mouldings offering texture and dimension, with hundreds of standard profiles plus custom matching and design capabilities.
- Softwood Moulding Softwood moulding solutions with smooth paint-ready finishes, trending designs, and high-quality material to avoid warping.
- MDF Moulding Engineered MDF interior finishing moulding with a uniform smooth surface free of knots, economical for intricate designs and paint projects.
- Commercial Hardware Commercial-grade hardware including electronic access control solutions, locks, and door hardware for high-use commercial environments.
- Residential Hardware Residential hardware offerings with multiple styles, finishes, and functionality options, including innovative security solutions for homes.
- Pre-Hung Door Assembly Factory-built pre-hung door units with jamb, trim, and hardware assembled, supported by a state-of-the-art finish line system capable of producing over 1,500 units per week.
- Fire-Rated Doors Warnock Hersey Mark-certified fire-rated doors, machined in-house by a certified fire-rated shop for projects requiring specific fire safety ratings.
Companies that use National Door and Trim
Customer profileNamed customers10 records
Segments4 records
Ideal customer profiles4 records
National Door and Trim technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
National Door and Trim partnerships and signals
Strategic signalPartnerships
13 partnerships are on record, tiered core.
- Masonite ArchitecturalcorePrimary vendor partner for architectural grade wood commercial doors and molded interior doors. Provides technical specifications and catalogs for product specification.
- AllegioncoreCommercial hardware partner providing access control, electronic solutions, and commercial-grade hardware. Technical support and product catalogs available.
- Assa AbloycoreOpening solutions and commercial hardware partner. Technical resources and product information provided for commercial applications.
- SchlagecoreResidential and commercial hardware including electronic access control. Technical support and product catalogs for specification.
- Ceco DoorcoreHollow metal doors and frames supplier for commercial applications. Technical resources and product literature available.
- SteelcraftcoreHollow metal door and frame products for commercial projects. Technical documentation and catalogs for product specification.
- ThermaTrucoreFiberglass exterior door systems. Technical specifications and inspiration literature for residential applications.
- De La FontainecoreHollow metal frames and doors supplier. Technical library available for commercial product specification.
- NGP (National Guard Products)coreCommercial hardware including door hardware and accessories. Product catalogs for specification.
- Dorma KabacoreCommercial door hardware and access solutions. Knowledge center and technical support available.
- BESTcoreCommercial grade hardware and access control. Support literature and product documentation.
- HagercoreDoor hardware and trim products. Resource library with catalogs and technical documentation.
- MetriecoreHardwood moulding and millwork products. BIM library and catalogs for specification.
Scale indicators4 records
Recent moves9 records
Expansion highlights5 records
National Door and Trim competitors and assessment
Company assessmentDirect peers
- Marshfield DoorSystems: Wisconsin-based manufacturer of commercial architectural wood doors, including fire-rated and stile-and-rail products — directly comparable in commercial wood door manufacturing and specification-driven sales to ND&T's architectural door category.
- VT Industries: Iowa-based manufacturer of architectural wood doors, postformed countertops, and custom components serving commercial construction — comparable commercial door manufacturing capabilities and specification model.
- Trimlite: Manufacturer of interior doors, mouldings, and millwork serving residential and light commercial builders — directly comparable moulding and pre-hung interior door category to ND&T's residential line.
- Woodgrain Millwork: Idaho-based manufacturer of pre-hung doors, millwork, and moulding serving residential and commercial construction across North America — directly comparable product mix, distribution model, and customer base to ND&T.
- Algoma Hardwoods: Wisconsin-based manufacturer of hardwood stile-and-rail doors and architectural wood components — comparable custom interior and architectural wood door offering for commercial and residential customers.
- Eggers Industries: Wisconsin-based manufacturer of architectural flush wood doors, stile-and-rail doors, and custom millwork serving commercial and institutional construction — overlaps with ND&T's architectural and commercial door lines.
Broad incumbents
- Cornerstone Building Brands: Public building products manufacturer of exterior building products including doors, windows, and siding — broad incumbent with overlapping commercial and residential door categories, though serving a wider envelope of products beyond ND&T's specialty.
- Masonite: Global door manufacturer with deep commercial and residential door lines, including architectural and molded interior doors — ND&T is also a Masonite Architectural distribution partner, illustrating the incumbent–specialist relationship.
- Sierra Pacific Industries: Large vertically integrated wood products manufacturer producing windows, doors, and millwork — broad incumbent with comparable door and millwork manufacturing capabilities, though operating at substantially larger scale.
- JELD-WEN: Global manufacturer of windows, doors, and millwork across residential and commercial segments — a broad incumbent whose product portfolio (interior, exterior, commercial, moulding) directly overlaps with ND&T's full catalog, though at significantly greater scale and geographic reach.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
National Door and Trim financial estimates
Financial estimateRevenue estimate
Valuation estimate
National Door and Trim leadership team
Management profileNumber of profiles
Profiles5 records
National Door and Trim funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
National Door and Trim M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about National Door and Trim
What does National Door and Trim do?
National Door and Trim is a manufacturer and supplier of pre-hung, pre-finished, and customizable doors, moulding, frames, and hardware for commercial and residential construction. The company acts as a single-source supplier delivering complete Division 6, 8, and 10 packages for multi-family, student housing, senior living, and single-family residential projects. It operates manufacturing and stocking facilities in Ohio and North Carolina, producing over 1,500 pre-hung doors per week with factory-applied finishes.
Is National Door and Trim a public or private company?
National Door and Trim is a private company. It is classified as family owned and is currently operating.
When was National Door and Trim founded?
National Door and Trim was founded in 1967. It employs 51 to 100 people.
Where is National Door and Trim based?
National Door and Trim is headquartered in Van Wert, United States, in the North America region.
How does National Door and Trim make money?
Two revenue lines are on record. Commercial Door and Hardware Sales are the primary driver. The others are residential Door and Moulding Sales.
Who are National Door and Trim's main competitors?
Direct peers on record are Marshfield DoorSystems, VT Industries, Trimlite, Woodgrain Millwork, Algoma Hardwoods and Eggers Industries. Broad incumbents are Cornerstone Building Brands, Masonite, Sierra Pacific Industries and JELD-WEN.
Does National Door and Trim have an API?
No public API is recorded for National Door and Trim.
What industry is National Door and Trim in?
National Door and Trim's product category is Building Materials Manufacturing. Its primary akta.pro industry code is IMADAIAF, Commercial & Industrial Doors (Sectional, High-Speed, Fire, Security), with a secondary code of IMADAIAB, Interior Doors. Its NAICS code is 332321 and its SIC code is 3442.