We needed radon mitigation installed in our new-to-us home and Drennen came highly recommended by a coworker and we were not disappointed! Professional and efficient, we would use them again and recommend them to others!
July 2022
Drennen employees installed a radon mitigation fan and piping. They were very thorough and did an excellent job. I would highly recommend them to anyone. Great job! R Davis
May 2022
Drennan provided radon mitigation to a home I recently purchased. They were professional through out the process and tests show they improved the quality of my home with the work they provided.
Drennen Custom Contracting is your most trusted local source for quality radon mitigation, superior roofing of all kinds, and custom construction jobs ranging from small to large. Don't let your job be the learning curve for a start up company. Call the pros that have been serving Northern Colorado for almost 50 years!
