Certification Standards
Last updated: September 2026
1. Educational Framework and Sources
The EHCI learning framework covers wood science, species, applications and installation systems. Public guides identify supporting references and their limitations. They are educational summaries, not independently validated technical standards or proof of external accreditation. Confirm current assessment criteria directly with EHCI and follow applicable codes and product-specific instructions for project work.
2. Online Assessment and Conduct
Current online assessments use multiple-choice questions with question-weighted scoring. Passing scores, time limits and retake waiting periods are shown for each course. Candidates must complete assessments independently and follow the examination conduct rules. Results are recorded, but a timed online assessment is not evidence of independent proctoring, identity verification or observed field performance. Public practice questions are separate educational material and do not award credentials.
3. Credential Validity and Renewal
Use the expiration date recorded for the issued credential, together with its current status and scope. A saved badge is not proof that a credential remains current. Confirm renewal requirements with EHCI before expiration; this page does not promise automated reminders, a grace period or acceptance of a particular continuing-education activity. Expired credentials must not be represented as active even if a directory entry remains visible.
4. Certification Levels
EHCI offers a progressive five-level certification structure: **Level 1 — Core Fundamentals** covers wood science, moisture dynamics, species identification, fastener principles, finishing, and jobsite best practices. **Level 2 — Species Specialist** provides deep knowledge of specific hardwood species, their properties, and optimal applications. **Level 3 — Application Specialist** focuses on specific installation applications including decking, cladding, marine, and fencing. **Level 4 — Systems Specialist** covers complete system design including hidden fastener systems, ventilation, and corrosion management. **Level 5 — Master Exterior Hardwood Installer** requires completion of all prior levels plus on-site field assessment by EHCI-authorized evaluators.
5. Field Verification (Master Level)
The Master path describes practical evaluation in addition to prior learning. Before pursuing this designation, obtain written confirmation of current prerequisite credentials, the assessment rubric, evidence requirements, evaluator availability, fees and scheduling. Passing an online course or completing a public evidence checklist is not field verification. Do not rely on illustrative portfolio examples as formal assessment criteria.
6. Standards Scope
EHCI certification standards cover the following application domains: deck systems (residential, commercial, and elevated), dock and marine hardwood (freshwater and saltwater), exterior cladding and siding (rainscreen and direct-applied), fencing (structural and decorative), exterior ceiling and soffit, boardwalks and pedestrian surfaces, fastener systems (face-fastened and hidden clip), corrosion management systems (dissimilar metals, galvanic isolation), and finishing systems (penetrating oils, UV protection, maintenance protocols). Standards are updated as new applications, materials, and technologies emerge in the exterior hardwood industry.