What is the highest measured radon level

What can I do to mitigate radon while waiting for a full radon abatement system?

First radon is pretty serious business when you work that much in your basement. I have seen that the radon levels in the basement are consistently four times as high as in the upper levels. Your 6.8 score is high, but no alarm bells until you get a few scores this high.

First steps:

  • Open a window. Better than using fans is to create a convection pattern in your basement in which the air moves. Is your basement open enough to allow this to happen? Your windows are on sliders and easy to open. Let your basement ventilate. Also, don't close the doors on the steps. Let the cellar air convect up to the upper level. Airflow is the key.
  • Seal any cracks in your basement with caulk or epoxy sealant.
  • Have your basement tested again regularly over the next few weeks / months. I would say every 2-4 weeks.

If your future tests do not fall below the 4.0 pCi / L range, then you will certainly need remedial action. If they fall below 4, you need to find out if you can keep the good habits (ventilating the basement continuously) even if the weather is not good. So if your radon levels go down with just improving airflow and sealing, you need to test them every few months on the worst of days. Radon levels in a house can fluctuate a lot from day to day (I had a house tested at 7.5 one day and two days later and didn't touch the airflow, it was 4.3) so there is no way that "worst" day to know. But in winter you can approximate: "We haven't opened the windows for 3 days because it's hellishly cold. So let's test for radon."

In terms of damage control, most homes will run a PVC pipe from your basement to the outside of your home - most of the time, your roof / attic will be vented. Sometimes the air filter is installed in the basement, and sometimes in the attic. It's probably about opening up a couple of walls. It's definitely a home improvement of sorts, but that's another question that would require a lot of detail. I installed radon abatement systems in basements in one day and only my son helped. A damage control company will charge you between $ 800 and $ 2,000 depending on access to your basement (finished areas cost more), access to operate the vent, and the size of your home if you have a circuit to provide power to the House handles system, and what kind of system you want (you can usually get them in the big box for $ 100-500). DIY this could be a $ 200 job - it's just labor intensive - mostly mending drywall in your home.

How do I get a good contractor? I would make sure they are certified to mitigate radon. You can also call your local town hall and speak to the building inspector about local businesses that are certified or make a suggestion. Radon reduction is a lot of common sense (seal up your basement and pump air out) so it won't take long to speak to a contractor to see if they understand how to get the job done.

Maplemale

Follow-up question: What do you mean by convection pattern air flow? You mean run it across? ie. Maybe put a window ventilator on exhaust mode and another on the opposite side of the basement at the inlet? This house also has a concrete air raid shelter from the 1960s, most of which only remains open to the rest of the basement. Maybe we should seal the seams there first? It's 100% unfinished walls with seams. Have no other cracks that I can see elsewhere in the basement. Difficult to say as it is mostly done.

DMoore

If it's cool outside and your basement windows are upstairs in your basement, opening the windows along with opening the stairs should cause cooler air to come in and fill the basement and drive hot air out of the basement. Fans could be needed in the summer, but not now.

DMoore

And I agree with the others that your cough has nothing to do with radon. There are just too many things that could make you cough. This answer was only there to lower your radon levels, not to correct your health problems.

DMoore

To a certain extent, yes. But there is truth in what they say with embellishment. In fact, the link in your other answer is pretty good / neutral / scientific (and not read correctly). If someone says they're coughing, I wouldn't suspect radon, but its association with health problems is still in its infancy and who knows? Probably the worst part of dealing with radon is finding out the true levels of radon in your home. Of course, the mitigation companies have a reason to forecast high readings.