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Built for Reliable, Beautiful Interiors

Explore our range of engineered wood-panel solutions designed for performance, consistency, and refined finishes. From durable particleboard and fire-resistant mineral core to versatile door facings and hardwood plywood, each product is made to support demanding commercial, institutional, and residential applications.

ComponentsParticleboard–Non-Rated,20-,and45-MinuteFire-Rated

Flush and profiled interior doors
Solid and hollow core door assemblies
Hardware reinforcement zones
Architectural and residential applications

Engineered for Door Manufacturing Performance

Forte™ particleboard products are engineered to support a wide range of interior door constructions, including flush and profiled cores and hardware reinforcement components. Designed for use in solid and hollow core door assemblies, they contribute to structural performance while supporting fire-rated and acoustic requirements.

Controlled manufacturing processes and material consistency provide dependable performance across residential and architectural applications, with flexibility to meet varying design, duty, and regulatory needs.

Key benefits include:

Standards compliant:
Designed for use in assemblies built to WDMA I.S.1A specifications
Reliable machining:
Controlled density and particle structure support consistent routing, drilling, and adhesion
Smooth surface quality:
Sanded surfaces support clean face application and finished door appearance
Sustainable composition:
Made with recycled in-process material and compliant with TSCA Title VI and CARB Phase 2; FSC® certification available upon request
Logistics efficiency:
Mixed-product truckloads available to streamline freight and inventory planning across complementary Forte product lines

This combination of performance, consistency, and sustainability makes Forte particleboard a dependable solution for modern door manufacturing requirements.

The table below outlines core dimensional and physical data:

Property/Attribute	Typical Value	Metric Equivalent
Modulus of Rupture (MOR)	406 psi	2.8 mpa
Internal Bond (IB)	15–20 psi	0.10–0.13 mpa
Screw-Holding – Face	81–117 lbf	360–520 n
Thickness Tolerance	± 0.020 in.	± 0.5 mm
Squareness Tolerance	± 1/8 in.	± 3.2 mm

Typical representative production values tested per ASTM D1037.

The table below outlines Particleboard Door Core Product Options:

Product Type	Standard Application	Typical Density	Nominal Thickness Range	Size Range
Flush Core – Residential	WDMA Standard-Duty door constructions	19–32 pcf (304–513 kg/m³)	1.00–1.60 in. (25–41 mm)	Up to 4 ft. x 9 ft. (1,220 × 2,740 mm)
Flush Core – Architectural	WDMA Heavy-Duty door constructions	32–36 pcf (513–577 kg/m³)	1.00–1.60 in. (25–41 mm)	Up to 4 ft. x 9 ft. (1,220 × 2,740 mm)
Flush Core – Architectural, Extra-Heavy Duty	WDMA Extra Heavy- Duty (EHD) door constructions	36–38 pcf (577–609 kg/m³)	1.00–2.25 in. (25–57 mm)	Up to 4 ft. x 9 ft. (1,220 × 2,740 mm)
Profiled Core	Customer-specified panel designs	32–36 pcf (513-577 kg/m³)	1.12–1.75 in. (29–44 mm)	Up to 34 in. x 94 in. (864–2,388 mm)
Lock Blocks & Strips	Hardware reinforcement	32–36 pcf (513-577 kg/m³)	1.12–1.56 in. (28–40 mm)	Up to 3.5 in. x 84 in. (89–2,134 mm)

Fire-rated (20- and 45-minute) and ULEF Particleboard Core available. Thickness and panel size combinations are subject to manufacturing review

Sustainability & Compliance

TSCA Title VI / CARB Phase 2 compliant
FSC® options available upon request
Contributes to LEED v4 and v4.1 credits (MR: Sourcing of Raw Materials)
Contributes to LEED v5 credits (MR: Building Product Selection and Procurement)
Manufactured in the USA

ComponentsMineralCore–45-,60-,and90-MinuteFire-Rated

Stairwells, corridors, and rated partitions
Life-safety and egress paths
Commercial and institutional spaces including healthcare, schools, offices, and retail

Fire-Rated Performance with Manufacturing Flexibility.

Forte™ Mineral Core is designed for use in 45-, 60-, and 90-minute fire-rated door assemblies. Its mineral composition provides reliable thermal resistance, consistent machining, and excellent bonding with standard adhesives. Produced under controlled density and thickness tolerances, Forte mineral core delivers stable performance and confidence in certified assemblies.

Key advantages:

Excellent fire-resistance properties
Stable core composition uniform thickness
Compatible with wood veneers and facings
Lightweight Strength up to 47 % lighter than conventional mineral cores
Flexible minimum orders and mixed-product truckloads

The table below outlines the key Mineral Core products available:

Type	Description	Nominal Thickness	Details
Raw Core	Core for fire-rated door assemblies	1.47–1.60 in (37–41 mm)	45/60/90 min.; neutral & positive pressure; min. width 24 in, max. length 96 in
Cool Core	Core for metal doors requiring thermal insulation	1.47–1.60 in (37–41 mm)	45/60/90 min.; neutral & positive pressure; min. width 24 in (609.6 mm), max. length 96 in (2438.4 mm)
Banded Core	Core with stiles and rails qualified per fire listings	1.275–1.560 in (32–40 mm)	45/60/90 min.; neutral & positive pressure; singles 4×10 ft (1219.2 x 3048 mm), pairs 8 x 8 ft. (2438.4 x 2438.4 mm); Maple stile standard, others available
Accessories	Compatible stiles and rails for use with mineral core assemblies	—	45/60/90 min.; neutral & positive pressure

Optional glue-sizer surface available on all cores to promote quality adhesion

The table below outlines key dimensional and physical data:

Attribute	Value/Range
Thickness Tolerance	± 0.010 in (± 0.26 mm)
Length Tolerance	± 1/8 in (± 3.2 mm)
Width Tolerance	± 1/16 in (± 1.6 mm)
Squareness Tolerance	± 1/8 in (± 3.2 mm)
Density	≈ 18 lb/ft³ (288 kg/m³)
Internal Bond	≈ 30 psi (0.21 N/mm²)

Representative values; performance varies by configuration and rating

Fire-Rated Performance:

Certified to UL 10C/NFPA 252 fire performance standards.
Listed under UL and Intertek/WHI for 45-, 60-, and 90- min. neutral and positive pressure assemblies.
Meets Category A and B requirements when used within approved door constructions.

Sustainability & Compliance:

Complies with TSCA Title VI and CARB Phase 2.
FSC® and PEFC certifications are available upon request.
Manufactured in the USA using locally sourced materials and minimal waste

ComponentsDoorFacings

Available Options Include:

Wood veneer facings
Paint-grade facings
Specialty and performance facings

A refined surface—ready for specification and fabrication.

Forte Door Facings provide the surface layer for high-performance commercial, architectural and institutional doors, combining precision manufacturing, visual consistency, and customizable surface options. Manufactured in the USA, these facings are engineered for precise sizing and seamless integration with a full range of core constructions—including particleboard, mineral core, and structural composite substrates—supporting both performance requirements and aesthetic objectives in door manufacturing.

Key Advantages:

Clean, uniform surfaces
Designed for consistent adhesion and finishing
Supports architectural specifications and standards

Reliable match across production volumes

The table below outlines our full Product Range:

Product Type	Construction	Material	Nominal Thickness	Notes
Door Faces	Single-Ply	Wood Veneer	.020 in (0.51 mm)	Customer Lay-Up
Crossbands	Single-Ply	Raw HDF	.010 in (2.54 mm)	Paint Grade & Customer Lay-Up
Door Skins	2-Ply	Wood Veneer & Primed MDO	.125 in (3.2 mm)	Ready-to-Assemble
Door Skins	3-Ply	Wood Veneer & Primed MDO	.125 in (3.2 mm)	Ready-to-Assemble

FSC® Controlled Wood and NAUF/ULEF options available upon request.

Sustainability and Compliance

TSCA Title VI and CARB Phase 2 compliant
FSC® Controlled Wood available upon request
NAF options available for door skins and crossbands
Contributes to LEED v4 and v4.1 credits
- MR: Sourcing of Raw Materials
- EQ: Low-Emitting Materials
Contributes to LEED v5 credits
- MR: Building Product Selection and Procurement
- MR: Low-Emitting Materials
Conveniently located in Thorp, WI and Birchwood, WI

ComponentsHardwoodPlywood

Door skins and components
Cabinet panels
Furniture
Architectural millwork including wall panels, closets, ceiling tiles

Natural beauty with dependable construction.

Forte’s hardwood plywood panels are engineered to deliver the ideal balance of appearance, strength, and stability for premium door and cabinet applications. Available in thin constructions, multi-ply wood-on-wood options, and a wide range of custom formats and profiles, these panels provide the flexibility manufacturers need for both standard and specialty designs.

Key advantages:

High-quality hardwood faces
Stable, well-constructed cores
Suitable for clear finishes and stains
Consistent appearance across panels

The table below outlines the key products available for Hardwood Plywood.

Product Type	Standard Thickness	Applications
2-Ply	0.050 in (1.3 mm)	Panel inserts, door components, and other non-exposed back applications.
3-Ply	0.125-1 in (3.2 mm to 25.4 mm)	Cabinetry, furniture, and millwork panels with balanced construction.
All-Veneer (Wood-on-Wood)	0.075 in (1.9 mm)	Flexible overlays, wrapping, and non-structural decorative surfaces

Hardwood plywood panels are available in a variety of species, cuts, and match configurations. Custom sizes, grain orientations, and machining options are available based on application requirements

The table below outlines the key characteristics of Hardwood Plywood to help guide selection decisions.

Attribute	Value / Range	Notes
Standard Sizes	Up to 4 × 8 ft (1,219 × 2,438 mm)	Custom sizes available up to 4 × 10 ft (1,219 × 3,048 mm)
Thickness Tolerance	± 0.010 in (± 0.26 mm)	Internal quality control
Surface Quality	“A” grade (or specified)	Decorative Hardwood Association (DHA) Standard

Sustainability & Compliance

TSCA Title VI and CARB Phase 2 compliant
FSC® certification available upon request
Contributes to LEED v4 and v4.1 credits – MR: Sourcing of Raw Materials
Contributes to LEED v5 credits – MR: Building Product Selection and Procurement
Manufactured in the USA (Birchwood, Wisconsin)

Components Products