Retesting the radon levels

Now that the crawlspace has been sealed and insulated, it's time to see if the radon levels have improved. I went to Home Depot to pick up the radon test kits, found yet another brand (Pro-Lab) for $10 and bought two: one for the crawlspace and one for the ground level family room. But when I opened them, found that they charge $30 to do the analysis. Wow, the last two times I tested the kits included the analysis. But I didn't realize this until I'd already opened the packages, and I do want an accurate reading, so I'll go ahead and use these and see what I find. The interesting thing about these is that they recommend placing two detectors 6" apart, and they take the average of the two detectors. Hopefully, this will give me fairly accurate picture. I'm hoping for better results this time.

My tests from Feb and April 07, showed nearly 4 pCi/l in the family room and 27 to 37 in the crawlspace.

Insulating and sealing the crawlspace

On January 30, two trucks from Advanced Design pulled up and were ready to insulate and seal the crawlspace. They spent all day going under the house and back out to the garage and truck, really tough work. The goal was to solve both the cold floor problem downstairs as well as to get rid of the radon problem. They put a pipe down, the plastic over it, R-10 rigid insulation on the wall. The panels of rigid insulation were sealed to each other, at the top of each piece at the rim joist, and at bottom to the plastic.