Registered Exterior Wall Observer

On-site experts ensuring wall assemblies are installed in accordance with design documents, manufacturer requirements, and industry standards.

REWO Credential Process

The REWO - Overview

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Requirements

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Process

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Exam

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Fees

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Renewal

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Overview

Earning the REWO designation is a recognition of technical proficiency and expertise in the observation and quality assurance of exterior wall system installation. This credential is designed for individuals who observe and document exterior wall construction activities, identify potential issues, and help ensure that the completed assembly meets the intended performance for durability, air and moisture control, and aesthetics.

REWOs commonly:

Verify compliance with exterior wall design intent, specifications, and manufacturer guidelines.
Maintain a comprehensive understanding of exterior wall systems, materials, and components.
Perform exterior wall observation and documentation techniques for a wide range of wall system installations.
Complete detailed construction communication and reporting procedures.
Identify and address nonconforming or deficient work.
Support overall building enclosure performance through quality assurance practices.

REWO Flyer

Cover of IIBEC Registered Exterior Wall Observer (REWO) marketing flyer.

Application Requirements

Experience: A minimum of two (2) years of exterior wall quality assurance or exterior wall construction experience, and/or a minimum of four (4) years as an exterior wall manufacturer’s technical or sales representative.
Project Experience: Provide at least seven (7) projects from personal work history that highlight specific tasks and services relating to exterior wall quality observation.
Continuing Education: Complete 12 hours of continuing education, including attendance/completion of a minimum of three (3) seminars and/or courses within the exterior wall industry.
- CEHs within past 10 years are accepted.
- Online IIBEC courses are offered – see below for related resources.
Examination: Achieve satisfactory score on the REWO exam.

REWO Handbook

Application Process

Online Application: Create a user account and complete the application through the IIBEC Community Portal.
- Once started, application must be completed and submitted to IIBEC within one (1) year; otherwise, the application will expire.

Processing Time: Standard processing time is up to 75 days.
- Expedited processing (within 45 days) is available for an additional fee.
  - Expediting fee: $100 members/$150 nonmembers
Approval: Upon approval, information on how to register for the exam will be provided.

Apply Now

Exam

Three-hour exam featuring 60 multiple-choice questions that involve the following topics:
- Construction Documents
- Exterior Wall Systems
- Field Observation Practices
- Observer Responsibilities
- Reporting
Testing is completed through Meazure Learning, available at over 1,000 testing centers.
- Exam must be taken and passed within two (2) years of application approval.
- Retakes available every four (4) months. Registration and exam payment completed each time.

Exam Study Guide

Fees

*All fees payable in USD

Join for Member Pricing

Annual Renewal

Continuing Education
- Complete 10 building enclosure-related continuing education hours (CEHs).
- CEHs can be self-reported through the IIBEC Community Portal
Renewal Fees
- $175 – IIBEC Member
- $275 – Nonmember

Renew Now

Registered Exterior Wall Observer – REWO®

Registered Exterior Wall Observer

On-site experts ensuring wall assemblies are installed in accordance with design documents, manufacturer requirements, and industry standards.

REWO Credential Process

*All fees payable in USD

Resources

IIBEC REWO Handbook

IIBEC REWO Exam Study Guide

COURSE RECOMMENDATIONS

CREDENTIALS FAQs

Questions?

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