The CD250 delivers commercial-grade durability with a 5-year interior warranty that outperforms standard doors at a fraction of architectural pricing. This agfiber particleboard core door meets WDMA IS-1A & AWS Extra Heavy Duty standards, making it the practical choice for Montana office buildings, schools, and healthcare facilities where door failure costs real money.
Heavy-Duty Construction That Handles Montana’s Temperature Swings
The CD250’s agfiber particleboard core (ANSI A208.1 LD1 or LD2) bonds to HPVA Architectural ‘A’ grade wood veneer faces, with softwood stiles meeting AWS Type A solid wood standards. This bonded core construction matters when Montana buildings swing from 70°F inside to -20°F outside. Unlike Lynden’s SD series with hollow-core/loose-lay construction and just a 1-year warranty, the CD250’s bonded cores earn that 5-year coverage.
Standard thickness runs 1-3/8” or 1-3/4”, with custom options up to 2-1/2” for projects demanding extra mass. The door achieves STC 31 acoustical rating (non-operable) and OITC 29 — enough sound blocking for conference rooms and medical offices where privacy matters.
| Specification | CD250 Value | Source |
|---|---|---|
| Core Material | Agfiber particleboard (ANSI A208.1 LD1/LD2) | manufacturer |
| Face Options | HPVA ‘A’ grade veneer, ‘AA’ grade, MDO, HDF, or HPDL | manufacturer |
| Thickness | 1-3/8”, 1-3/4” standard; up to 2-1/2” custom | manufacturer |
| Max Size | Positive-Pressure up to 4’ x 9’ | manufacturer |
| Sound Rating | STC 31 / OITC 29 (non-operable) | manufacturer |
| Warranty | 5-year limited interior | manufacturer |
Fire Ratings and Code Compliance for Commercial Projects
The CD250 comes in 20, 45, 60, and 90-minute fire ratings, compatible with both Positive-Pressure Category A/B and Neutral-Pressure requirements. Positive-pressure rated doors handle up to 4’ x 9’ openings — covering standard commercial door sizes with room to spare.
Montana commercial buildings need doors that meet code without breaking budgets. The CD250 hits that target. Compared to Lynden’s LD architectural series with lifetime warranty pricing, the CD250 provides adequate 5-year coverage at commercial project price points.
Green Building Certifications That Matter
Indoor Advantage Gold certification from SCS for indoor air quality and low VOC emissions. FSC-Mix certification (FSC-C103189) covers green building requirements. NAUF (No Added Urea-Formaldehyde) options eliminate formaldehyde concerns. TSCA Title VI compliance meets EPA standards for composite wood products.
These certifications translate to LEED points and healthy building standards — increasingly non-negotiable for Montana schools and healthcare facilities.
| Certification | Details |
|---|---|
| Indoor Advantage Gold | SCS certified for indoor air quality and low VOC emissions |
| FSC-Mix | License FSC-C103189 for green building projects |
| NAUF Option | No Added Urea-Formaldehyde adhesives and binders |
| TSCA Title VI | EPA Formaldehyde Standards compliant |
Installation Requirements
Doors need storage at 50°F-90°F with 25%-55% relative humidity on 1-1/2” blocking with cover sheets. Top and bottom rails require two coats of sealer within 5 days of jobsite arrival. Hardware installation needs 3/32” to 1/8” clearance on sides and top.
All screw attachments require pilot holes. Surface-mounted hardware needs specific blocking per WDMA HB-1 through HB-8 standards. Factory machining for hardware comes available based on provided templates — worth ordering pre-machined to avoid field mistakes on commercial quantities.
The Bottom Line
The CD250 occupies the sweet spot between budget hollow-core doors and overpriced architectural series. WDMA IS-1A & AWS Extra Heavy Duty compliance means it’ll survive commercial traffic. The 5-year warranty beats standard doors by 4 years. Fire ratings cover code requirements. Green certifications check the LEED boxes.
For Montana commercial projects where durability matters but architectural pricing doesn’t fit, the CD250 delivers. The bonded agfiber core handles temperature cycling. The warranty backs up the construction. And the certifications keep everyone from the building inspector to the sustainability consultant satisfied.
FAQ
What fire ratings does the CD250 offer?
The CD250 comes in 20, 45, 60, and 90-minute fire ratings, compatible with both Positive-Pressure Category A/B and Neutral-Pressure requirements. Positive-pressure rated versions handle openings up to 4’ x 9’.
How does the CD250 warranty compare to other Lynden Door series?
The CD250 provides a 5-year limited interior warranty. The SD series only offers 1-year coverage with hollow-core/loose-lay construction. The LD architectural series includes lifetime interior warranty but at premium pricing.
What green building certifications does the CD250 carry?
The door includes Indoor Advantage Gold (SCS certified for air quality), FSC-Mix certification (FSC-C103189), NAUF options for no added formaldehyde, and TSCA Title VI compliance for EPA composite wood standards.
What are the storage requirements before installation?
Store doors flat on 1-1/2” blocking with cover sheets in climate-controlled conditions: 50°F-90°F temperature range and 25%-55% relative humidity. Seal top and bottom rails with two coats within 5 days of jobsite arrival.
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