GreenGuard® Insulation Board

Kingspan Insulation LLCGreenGuard Logo

GreenGuard building products are manufactured and distributed throughout the United States by Kingspan Insulation. GreenGuard products help to meet Green Building requirements to create healthier, more durable and cost-efficient structures.

Engineering Services

DrJ provides engineering and related services specializing in light-frame construction.

Structural engineering services are not currently offered in Illinois.

Product Certification

DrJ is an ISO/IEC 17065 accredited product certification body through ANSI Accreditation Services. 

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Learn more about DrJ and let us know how we can help with innovative products, processes and services. Knowledge, sound design and good installation always lead to success!

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