C-16-109 - Radon Challenges - Gnarly Tales from the Field (CERTI-325)

Interpreting radon measurements or mitigating buildings with radon concerns is not always as easy we would like them to be. Experienced radon professionals from both sides of the profession occasionally will run across a situation that doesn’t necessarily fit the simple diurnal cycles that affect stack effect or houses that don’t adhere to the simple mitigation diagrams we often see in texts.
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This course addresses unique challenges to the radon professional including:


  • Buried Return Ducts
  • Untreated Adjacent Foundations
  • Wind Spikes
  • Working with Tight Soils
  • Highly Permeable Soils
  • Leaky Forced Air Ductwork
  • Inaccessible Crawlspaces
  • Emanation from Contaminated Building Materials
  • In-Floor Heating Systems
  • Post Tension Slabs


This course goes beyond simply identifying these concerns but actually presents solutions using real life case studies.  It also demonstrates the use of diagnostic equipment to aid one in identifying a problem and provides downloadable tools that the student can use for estimating pressure drop in mitigation systems, air flow as well as the significance of a radon emanation source.


Recorded with a live audience, the virtual student benefits from the formal instruction and contributions from the seasoned professionals who participated.


The format of the course combines video of presenter and attendees synchronized with powerpoint slides for an experience comparable to being “in the classroom” without the hassle, which has become a hallmark for CERTI courses.



Course Includes:

  • Video (can be paused and navigated via Table of Contents or Key Word Search)
  • Online Quizzes
  • Downloadable Course Certificate
  • 16 CE Credits  (Category 1)


  • Download/Streaming - No course materials will be shipped - everything you need is available to access and download online.
  • Materials Shipped - This option includes shipment by U.S. Priority Mail within the continental U.S. of course materials which includes a binder with the course manual and a CD.  You also have access to all course materials online.  Cost - $20 


Monday, 14 September 2020
Nathan said: Another great course. Doug always makes learning fun and memorable.
Bart Van Oostendorp
Sunday, 30 August 2020
Brian said: I recommend
Bob Engibous
Friday, 28 August 2020
Craig said: have taken many ce courses over the years, but this one was interesting and quite useful
Jonathan Kiefner
Wednesday, 29 July 2020
Daniel said: I recommend this course 5/5
Don Kibsgaard
Friday, 17 July 2020
Jerry said: Very knowledgeable with stories from the field that helps understand what can happen in the field. Doug is always willing to offer some advice when needed
Jacob Williams
Sunday, 12 July 2020
Ken said: well done
Nicholas Meyer
Sunday, 12 July 2020
James said: great course, thank you.
Tim Utterback
Saturday, 11 July 2020
Justin said: I recommend 5/5
Tuesday, 30 June 2020
Daniel said: 5/5 I recommend this course
Forrest A. Lines
Monday, 08 June 2020
JOHN said: all good
Jason McKinstry
Monday, 25 May 2020
Carlos said: Keep up the great work!
Allen Berglund
Monday, 18 May 2020
Matthew said: I recommend this course
Joseph Petrozola
Friday, 01 May 2020
Michael said: I recommend 5/5
Thursday, 30 April 2020
Matthew said: I recommend this course 5/5
Wednesday, 29 April 2020
Peggy said: Helpful
Jeffrey Molony
Sunday, 26 April 2020
Josh said: I recommend 5/5
Sunday, 26 April 2020
Jamie said: Gives great examples for how to critically think through problems with radon reduction.
Glenn Gray
Wednesday, 22 April 2020
Tom said: This course has value for a mitigator or a measurement tech who wants a better understanding of the the challenges of radon mitigation under extra ordinary circumstances. I thought is was great! Thanks you.
Scott Ross
Saturday, 18 April 2020
Fernando said: I recommend 5/5
John Salas
Thursday, 16 April 2020
Kathleen said: I recommend 5/5
Ronald Black
Friday, 10 April 2020
Daniel said: Great! Covered many topics not generally covered in these courses
Saturday, 04 April 2020
Rodney said: I recommend
Ray Spletzer
Monday, 30 March 2020
Ryan said: Doug referred me to this course and its helpful to have this material for future purposes
Mario Andrino
Monday, 30 March 2020
michael said: good
Wednesday, 25 March 2020
John said: Very well organized and presented as all Certi courses are and gives radon professionals the information needed to resolve many difficult radon mitigation situations.
Richard Henry
Monday, 16 March 2020
Paul said: I indeed recommend this course
Wednesday, 04 March 2020
Kevin said: Really good course!!
Peter Davis
Wednesday, 26 February 2020
James said: Very informative
William R. Woodruff
Tuesday, 25 February 2020
Janryk said: Even after 30yrs in the business, this class was still interesting and informative!
Thursday, 20 February 2020
William said: loved it
Thursday, 13 February 2020
David said: Lots of good information. Easy to follow along with Mr. Kladder.
Stephen Wilson
Monday, 10 February 2020
Richard said: very happy with the course
William Zorella
Sunday, 09 February 2020
murray said: I recommend
Nick Dennis
Tuesday, 04 February 2020
David said: Content and relevancy of topic to real life were the strong points. Sound quality was questionable at times mostly when Doug got input from the students. Would recommend this to any radon professional and a must to mitigators. Should help any mitigator with his or her business when encountering tough situations in the field.
Robert Dwyer
Wednesday, 29 January 2020
Brian said: I recommend this course
Wednesday, 25 December 2019
Thomas said: Lots of good knowledge.
Peter Blankinship
Friday, 20 December 2019
Byron said: This was much more needed practical knowledge than others that I have taken which focus on the detailed science
Friday, 20 December 2019
Ron said: I recommend this course
Robert Aber
Saturday, 14 December 2019
Joseph said: Courses are informational.
Wednesday, 11 December 2019
David said: I recommend tis course
Brian Nice
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