PROJECT PROBONO LLC

Project Probono LLC operates as an insulation contractor serving Bethlehem and the broader Lehigh Valley region in Pennsylvania. The company holds a 4.9-star rating compiled from 78 client reviews, reflecting consistent satisfaction across its customer base. Founded in 1997, Project Probono has built its reputation on a building-science-driven approach to home performance, emphasizing diagnostic evaluation over guesswork. Their in-house team handles retrofits directly, ensuring controlled quality throughout each project.

What distinguishes Project Probono from typical insulation contractors is their diagnostic-first methodology. The company utilizes blower door testing to measure a home's air tightness before and after work, providing clients with quantifiable results rather than estimates. They offer Aeroseal duct sealing, a specialized technique that addresses leakage within ductwork systems, a common source of efficiency loss that many contractors overlook. Their energy audits evaluate air tightness, ventilation, humidity, and moisture levels alongside energy efficiency, creating a comprehensive picture of home performance.

Reviewers frequently mention technicians Mike, Omar, and Mike Jr. by name when describing their experiences. One client recounted how Mike explained exactly where the home was losing efficiency before recommending solutions, then had Omar and Mike Jr. complete Aeroseal duct sealing and R-49 attic insulation installation. Another reviewer noted the crew performed a follow-up blower door test showing air leakage had been cut in half, actual results the client described as more meaningful than simply hoping the work made a difference. A third reviewer, a contractor who referred Mike to a customer, received feedback that Mike was professional, knowledgeable, and easy to work with throughout the entire process.