Exterior Cement Board

Available variants

1 SKU · all share width 1220mm where applicable

Density 1–1.4 g/cm³ · Flexural strength ≥ 7 MPa (equilibrium)

Compliance & certifications

Test reports and assembly references available on request for AHJ submittal.

• INTE/ISO 8336:2018 — International fiber-cement standard
• RTCR 491:2017 — Costa Rica National Technical Regulation
• NCh1914/1.Of84 — Chilean non-combustibility test — manufacturer-claimed equivalence to ASTM E-136 / E-84 (not independently certified for US market; residential positioning does not require US fire-rated commercial cert)
• ISO 9001:2015 / 14001:2015 / 45001:2018 — Manufacturing certified (Costa Rica, El Salvador, Honduras plants)

Frequently asked questions

Common technical and specification questions for Exterior Cement Board.

• Is this product positioned for commercial Type I/II construction?+

  No. PLYCEM positions Microconcreto Exterior specifically for residential projects — exterior remodel and addition facades, residential interior wet areas, and residential soffit cladding. It is NOT positioned by the manufacturer for commercial Type I/II construction, NFPA 285 wall assemblies, or buildings above 40 ft. For commercial fiber-cement substrate needs, US-market specifiers typically use products with documented ICC-ES ESR or NFPA 285 assembly listings (DensGlass Gold, DuRock, PermaBase, James Hardie HardieBacker) — those are different competitive categories.

• What about US code compliance for residential use?+

  For one-family and two-family dwelling exterior facade work under the IRC residential code path, the Authority Having Jurisdiction typically reviews manufacturer ASTM C1186 / ISO 8336 documentation and approves under alternative-materials provisions. PLYCEM's June 2024 datasheet does not list a US-accredited ASTM lab report, ICC-ES ESR, or IAPMO ER for this product — it lists Costa Rica RTCR 491:2017, INTE/ISO 8336:2018, and a Chilean NCh1914 non-combustibility note. Contact JARA for current verification status before specifying; if your AHJ requires a US-issued evaluation report, this product is not a match for your project.

• How is basecoat or stucco applied to the panel?+

  The double fiber-glass mesh embedded on both faces of the panel provides a mechanical key for direct-applied basecoats, fiber-reinforced stucco systems, and acrylic finishes. For residential remodel and addition work, most one-component or two-component basecoat / acrylic stucco systems will adhere directly to the meshed face. Confirm specific compatibility with the finish manufacturer's technical specifications and with your local AHJ inspector.

• Where is it typically used inside the building?+

  Residential interior applications include wet areas (bathrooms, kitchens, laundry rooms) where the panel's humidity resistance outperforms gypsum wallboard, and soffit cladding. For commercial wet areas (locker rooms, high-impact corridors, healthcare wet walls), US specifiers typically use a substrate with documented commercial ratings — this product is not positioned for that segment.