On site, "delam" gets used for almost any panel that looks like it is coming apart. In the standards, plywood delamination is narrower: a visible separation between plies at a glue line that should have been bonded in the press. Film peeling and veneer checks are different failures, and naming the right one is where a fair quality claim starts. This episode is informational only — not legal advice and not a commercial offer.

What You'll Learn

• How the standards define delamination — and why splits, checks and broken grain in the wood do not count
• Four symptoms site crews call "delam" and what each usually points to: core glue line, press fault, overlay bond or veneer checking
• Why glue lines let go: wet-dry cycling, a bond class mismatched to exposure (UF vs MUF vs phenol-formaldehyde) and under-cured pressing
• How EN 314-1 pretreatments (24-hour cold soak through 72-hour boil) and shear tests feed EN 314-2 Classes 1, 2 and 3
• What "wood failure" means, and how PS 1 Exposure 1 and Exterior thresholds compare for North American buyers
• Why film-faced formwork carries two bonds, core and face, and why edges usually fail first
• A buyer checklist: bond class, pretreatment, actual shear and wood-failure numbers, edge seal, lab name and test date

Key Standards / Data Discussed

• EN 314-1 (plywood bonding quality — test methods and pretreatments)
• EN 314-2 Bond Classes 1, 2 and 3 (dry, humid, exterior)
• PS 1-22 structural plywood (Exposure 1 and Exterior bond requirements)
• APA bond classifications (moisture resistance of the bond, not panel strength)
• WBP as trade shorthand (water-resistant, not water-immune)

Market data, pricing estimates, transit times, and standards references in this episode are based on information available as of October 2026. Figures are indicative and may not reflect current market conditions.

Resources

Before making any sourcing or specification decision, request current technical datasheets, independent lab test reports, and a formal written quotation directly from the Vinawood team.

Source article (atlas): Plywood Delamination Explained: Glue-Line Failure, Bond Tests and What Buyers Should Ask · Companion mill explainers: Plywood adhesives · Concrete delamination (the slab-side look-alike) · Contact the Vinawood team · vinawoodltd.com

Disclaimer: This podcast is produced for informational and educational purposes only and does not constitute procurement advice, legal advice, technical engineering advice, or a commercial offer. Standards, certifications, specifications, pricing estimates, and transit times referenced in this episode reflect information available at time of recording and are subject to change — they should be independently verified before any purchasing, specification, or contracting decision. Listeners are encouraged to request product samples, current technical datasheets, independent test reports, and formal written quotations directly from suppliers before making sourcing decisions. Vinawood makes no representations or warranties, express or implied, regarding the accuracy, completeness, or fitness for purpose of information presented.