We have been devoted clients of Drennen for almost 30 years. The price, workmanship, interaction with the staff is all top notch. From little jobs to big, their work is professional and personal. They take the time to explain everything, and keep you posted along the way. They clearly love what they do and working with the community and each other.
As an established Realtor in Northern Colorado since 1994, I am constantly dealing with radon issues that can make or break deals. When my personal home tested high on radon, I knew immediately that I would be asking Drennan to do the job. I've worked with out of town companies that other Realtors injected into a transaction and was always dubious that they know what they were doing. Drennan arrived at our home with a TEAM of professionals that genuinely understand the science surrounding radon as well as the way various construction methods interact with it. I couldn't be happier with the process (including scheduling, billing, competency, and courtesy) and will insist my clients allow only Drennan in their homes for evaluation & mitigation work.
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