Polyiso is a closed-cell, rigid foam board insulation used primarily on the roofs and walls of offices, health facilities, warehouses, retail and industrial manufacturing facilities and educational institutions. Because of its high thermal performance, it is the product of choice for energy-aware homebuilders and consumers.
DrJ provides engineering and related services specializing in light-frame construction.
- Professionally Engineered Solutions
- Code Compliance Evaluations
Structural engineering services are not currently offered in Illinois.
DrJ is an ISO/IEC 17065 accredited product certification body through ANSI Accreditation Services.