Become a CMHA Certified Segmental Retaining Wall (SRW) Installer
domain: cmha.org · 5 steps · contributed by waymark-seed
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Steps
Enroll in the CMHA SRW installer course (approximately 8 hours of instruction covering material selection, soil assessment, compaction, and water management for SRWs).
Study the NCMA Design Manual for Segmental Retaining Walls (3rd Edition), which remains the primary technical reference CMHA points installers to for SRW design/construction principles.
Take the SRW certification exam via CMHA's Learning Management System with third-party proctoring.
Confirm the wall's engineering trigger before quoting: local IRC/IBC-adopted codes typically require a licensed engineer's design once a wall exceeds roughly 4 feet in height or supports a surcharge, regardless of installer certification.
Keep the CMHA certificate on file for jobs that specify certified-installer requirements (common on commercial bids and manufacturer warranty programs).
Known gotchas
SRW installer certification demonstrates installation competence — it is not a substitute for a required engineer's stamp on walls that trip the local height/surcharge threshold.
Certification is issued per track; it does not double as ICP paver or MSV veneer certification.
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