Which IICRC Cert First: WRT, ASD or AMRT?

Walk into any restoration company and you'll hear the alphabet soup: WRT, ASD, AMRT, FSRT, OCT, CCT. Three of them — WRT, ASD, and AMRT — form the backbone of a residential restoration career. But which one should you tackle first? And do you actually need all three? Here's a straight answer.

The Quick Verdict

Start with WRT. Always. Then add ASD within 6–12 months. Only pursue AMRT once you're regularly encountering mold-affected jobs and want to bid them directly. That order matches how the IICRC designed the curriculum and how most restoration shops promote technicians.

WRT — Water Damage Restoration Technician

The foundation. WRT covers the S500 standard: water classes and categories, psychrometry, drying principles, moisture measurement, PPE, and documentation. The IICRC offers it live-stream and in person.

If you're new to restoration, this is non-negotiable. Most insurance carriers won't accept invoices from companies whose lead techs aren't WRT certified. See our honest breakdown of WRT exam difficulty and the cost and what's included.

ASD — Applied Structural Drying

ASD is WRT's hands-on sequel. Where WRT teaches the theory, ASD puts you in a flood house where you actually deploy air movers, dehumidifiers, and monitoring equipment on real wet materials. It's the most lab-heavy IICRC course and the one most techs report enjoying the most.

Prerequisite: most ASD courses require WRT first because the instruction assumes you already speak the S500 vocabulary. ASD is where dehumidifier selection stops being abstract.

AMRT — Applied Microbial Remediation Technician

AMRT covers the S520 mold remediation standard — containment, HEPA filtration, antimicrobial application, and clearance testing. It's specialized; you don't need it for a typical water loss. You do need it once a job has passed the mold prevention window and growth is established — the EPA advises drying water-damaged areas and items within 24–48 hours to prevent mold growth.

Some states license mold remediation separately, with their own training and exam requirements. Check your state's licensing board before bidding mold work.

Cost and Time Comparison

• WRT: tuition is set by each school and varies by format (livestream or in person); the IICRC exam fee is $80, and a retest is $80, as listed in the IICRC FAQs. No prerequisite.
• ASD: tuition is set by the school; the class runs in person because of the hands-on drying lab, and WRT is a prerequisite.
• AMRT: tuition is set by the school; the IICRC exam fee is $150, as listed in the IICRC FAQs.
• Class length is set by the school offering it — check the listing in the class directory, and see the IICRC certification cost guide for every published fee.

Find courses in your state through our IICRC class directory.

The Career Path Most Techs Follow

A realistic 24-month progression:

• Months 0–3: Hired as a technician, study for WRT in evenings, take the course and exam
• Months 3–12: Run jobs as a WRT-certified tech, build hands-on experience
• Months 12–18: Take ASD, promoted to lead technician or project manager
• Months 18–24: Add AMRT if your company handles mold; consider FSRT (fire/smoke) or OCT (odor) for further specialization

For salary expectations at each step, see our restoration career guide.

Studying for All Three

The good news: the foundational science — psychrometry, water behavior, moisture measurement — transfers directly between WRT, ASD, and AMRT. Master it once with our practice exams and flashcards, and the upper courses get noticeably easier.

Start with the free WRT practice exam and the free psychrometric chart. That's the doorway to every other IICRC credential.