Lynden Door CD200: Commercial Performance at Particle Board Pricing

The CD200 delivers measurable commercial performance with 20-minute fire ratings, STC 32 acoustic ratings, and WDMA Extra Heavy Duty compliance at particle board pricing. Bonded sanded core assembly addresses the telegraphing and warpage issues that plague lesser particle board doors.

This door targets commercial contractors who need verified fire and acoustic performance without mineral core pricing. Office buildings, multi-family projects, and institutional settings that require 20-minute separation get proven performance from a door that handles daily abuse.

Fire-Rated Performance Specifications

The fire rating comes with specific size limitations contractors need to understand. Positive Pressure: 4’ x 9’; Neutral Pressure: 3’ x 10’ or 4’ x 9’ maximum dimensions apply to maintain the 20-minute rating. UL 10B (Neutral Pressure) & UL 10C (Positive Pressure) testing validates performance to NFPA 252 (Standard Methods of Fire Tests of Door Assemblies).

Fire Rating Specification	Value	Source
Rating Duration	20 minutes	(tested)
Positive Pressure Max Size	4’ × 9’	(tested)
Neutral Pressure Max Size	3’ × 10’	(tested)
Thickness Required	1-3/4”	(manufacturer)
Cutout Distance from Edge	6” minimum	(manufacturer)
Vision-Lite Max Area	1,296 sq in	(manufacturer)

Factory prefitting and machining are recommended for all fire-rated doors. Don’t let field crews hack away at these doors — Louvers are strictly prohibited in 20-minute fire-rated doors and cutouts must be at least 6” from any edge or other cutout.

Acoustic Performance and Hardware Requirements

The STC 32 rating requires specific attention to installation details. STC 32 (ASTM E90-09, non-operable) applies to the door alone. Getting that same performance in the field means can achieve STC 32 operable with specific hardware — specifically NGP 5075 or Pemko S773 seals.

Acoustic Specification	Value	Notes
STC Rating (Non-Operable)	32	(ASTM E90-09)
STC Rating (Operable)	32	With specified seals
Core Density	28-32 lb/ft³	(manufacturer)
Required Seals	NGP 5075 or Pemko S773	(manufacturer)

That 28 – 32 lb/ft³ particle board density delivers mass where it counts for sound control. Dense enough to block conversation, light enough that installers won’t blow out their backs.

Core Construction and Stability

Bonded sanded core assembly sets this apart from commodity particle board doors. Type 1 waterproof adhesives used throughout construction means the core won’t delaminate when humidity cycles through Montana’s seasonal swings.

The faces deserve mention — HPVA Architectural ‘A’ grade wood veneer (min 1/50” before sanding) comes standard, with Options for ‘AA’ grade, MDO, or HDF available. Softwood (AWS Type A) standard stiles can upgrade to Optional hardwood (AWS Type B) matching face veneer.

Installation Specifications and Compatibility

Factory glazing under label service if light openings are included — this isn’t optional for maintaining fire ratings. Vision lites cap out at max width 36”, max height 54” with Total visible light area ≤ 1,296 sq in for 20-minute doors.

The warranty tells the real story about intended use: 5-year limited warranty; scope: Interior use only; limitations: Not warranted for exterior applications. Keep these doors inside where they belong. light openings must not exceed 40% of the door face or half the door height to maintain warranty.

WDMA Extra Heavy Duty performance means these doors handle commercial traffic. Compared to the CD350 or CD450, which utilize mineral cores for higher fire ratings (45-90 minutes), the CD200 uses a particle board core limited to 20-minute fire ratings but provides better stability against deflection and telegraphing in standard commercial sizes.

For Montana contractors dealing with multi-family projects that need verified 20-minute separation, the CD200 delivers code compliance without the weight and cost of mineral core alternatives. The acoustic performance handles most commercial privacy requirements when properly sealed. Just remember — factory machining for fire-rated installations, proper seals for acoustic performance, and keep them away from exterior openings.

Frequently Asked Questions

Q: What’s the maximum fire rating I can get with the Lynden Door CD200?

The CD200 provides a 20-minute fire rating (both positive and neutral pressure tested to UL 10B and UL 10C standards). For higher ratings like 45-90 minutes, you’ll need to step up to Lynden Door’s CD350 or CD450 models which use mineral cores instead of particle board.

Q: Can I cut this door down to fit or add hardware in the field for a fire-rated installation?

Factory prefitting and machining are recommended for all fire-rated CD200 doors, with cutouts requiring at least 6 inches from any edge or other cutout. Louvers are strictly prohibited in 20-minute fire-rated doors, and any vision lites must be factory-glazed under label service to maintain the fire rating.

Q: What’s the actual sound rating on the CD200, and do I need special hardware?

The CD200 achieves STC 32 (tested to ASTM E90-09) in non-operable conditions, but to maintain that STC 32 rating when installed, you’ll need specific perimeter seals like NGP 5075 or Pemko S773. The door’s particle board core density of 28-32 lb/ft³ provides the mass needed for effective sound control.

Q: Can I use the CD200 for an exterior door application?

No, the CD200 carries a 5-year limited warranty for interior use only and is not warranted for exterior applications. Lynden Door specifically restricts this model to interior commercial settings.

Q: What are the size limitations for fire-rated CD200 doors?

For 20-minute fire-rated applications, the CD200 maxes out at 4’ x 9’ for positive pressure ratings or 3’ x 10’ for neutral pressure ratings. Non-rated versions can go larger (up to 4’ x 10’ single or 8’ x 10’ paired), but you lose the fire rating certification.

Q: How much glass can I put in a CD200 door and keep the warranty?

Light openings must not exceed 40% of the door face or half the door height to maintain the warranty. For fire-rated doors, vision lites are further restricted to 1,296 square inches total visible area with maximum dimensions of 36” wide by 54” high.