Drennan did a great job when they came to mitigate our radon. They were very professional and explained everything well.
September 2024
We had a great experience initially when we used Drennen to install our radon mitigation. Then 18 months later when we had to troubleshoot after a roof replacement they were so kind and helpful. Couldn’t recommend more!
September 2024
Drennen installed radon mitigation in our home. The guys were courteous, professional and knowledgable at a competitive cost. I would recommend them to anyone needing to address radon issues.
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!
