MasterSweep Professional Chimney Service is a locally-owned and operated business specializing in WETT Certified Sweeps and WETT Inspections on wood burning systems. Gray Biggins and Rainbow Monds are the only Advanced Sweeps, Advanced Technicians, and Advanced Comprehensive WETT Inspectors in the area. Our certified technicians have combined experience of over 50 years in the industry. Email today to schedule a service! more... See more text