Cornerstone IAQ Services LLC

Cornerstone IAQ Services LLC delivers air duct cleaning, dryer vent cleaning, and mold remediation across Derry, New Hampshire. Backed by a 4.9-star rating from 53 client reviews, this contractor has built a track record serving both residential homeowners and light commercial clients throughout the greater Derry area.

What distinguishes Cornerstone IAQ Services is their commitment to industry-recognized credentials. Their team holds multiple certifications from respected authorities in the indoor air quality field, ensuring standardized protocols for every job from routine duct cleaning to full-scale mold remediation. This focus on verifiable qualifications gives customers confidence that work meets established safety and performance benchmarks.

Customer reviews consistently highlight Jason and his crew for their thoroughness and professionalism. Christine R notes the team cleaned 100 dryer vents at her workplace community and left the site spotless afterward. Rachel McPherson describes how Jason carefully handled a small mold remediation in her bathroom, noting his caution with her mold allergies. Several reviewers mention the crew also helped connect them with other contractors for additional repair work beyond the original scope.