Brian Karr

The Mold Guy, Inc.

Brian Karr is a second-generation indoor environmental consultant who specializes in working with hypersensitive individuals with complex medical conditions. He helps them to understand if mold, mycotoxins or other indoor pathogens exist in their homes that may be contributing to their health conditions, and how to remedy those issues. Brian has become a go-to mold & biotoxin resource for many medical practitioners across the country and has helped over 3,000 hypersensitive individuals create healthier living environments that have allowed their doctors to help them get better.

Brian is the co-founder of We Inspect, a national indoor environmental assessment company specializing in mold and biotoxin detection and management for hypersensitive individuals. He is also the creator of Mold Masterclass (, a digital training program developed for hypersensitive individuals and the doctors who treat them. The program teaches its students how to identify and remediate mold and mycotoxins within the home.

Brian is a Certified Microbial Investigator (CMI) accredited through the American Council for Accredited Certifications, North America's oldest and most prestigious certifying body dedicated to indoor air quality. He is an expert at identifying indicators of mold growth and strategically sampling, validating, and developing remedial strategies for mold growth and biotoxin production in all areas of a home or building including walls, floors, ceilings, crawl spaces, basements, attics, and HVAC systems.