Never had that issue come up, as far as the floating slab. Where I am we have to have frost footings, so a floating slab is out of the question. I would try contacting the infiltec website I gave you by phone and see what they recomend. I would say you would have to cut some insulation out of the gap if there is any and fill it with a large gap filler. I know they sell an expanding urethane foam but it is pricey. Call infiltec and see what they say.Thank you, James Con.
What do I do about the 2+" gap between the floating slab and the walls of the basement?
Yes, Yes. I actually bought one when I was first testing my house. Works well and it continually monitors the levels, short and long term. You just plug it in wait I think it was three days to the hour for the reading. mine still reads zero. I even brought it to all my familys houses to test there homes and they're homes tested hot. :thumbsup::thumbsup:I have a couple of these (really only needed one). They work well in my opinion. You can see how it changes.
<<<< In response to the above, this looks a little dated but I am getting ready to install a radon mitigation system myself and also thinking about getting the book above. Does anyone know if the book advises on how many slab penetrations to make? I have quite a large basement and I am curious if it will take more than one hole. I have a reading of 8.3 currently with two windows cracked open about a 1/4 of an inch. My reading on the living level was around 12 with windows shut during the summer. My house is only a couple years old and is insulated with spray foam and is very tight. The heating/cooling system also recirculates air from the basement and I am getting ready to finish the basement with two bedrooms, bathroom and living room. Does anyone have some good advise for this situation? Thanks>>>>>The book I mentioned is named, Protecting your home from radon a step by step manual for radon reduction. Very informative book. the web site I bought my supplies from is. http://www.infiltec.com/inf-catr.htm#Manual they have everything you need, from the caulk to even the sump covers. What I would do first is order the book, sump cover and the polyurethane caulk. Read the book, cover the sump, seal the cracks then do another reading. and take it from there. I'd say you should put the system in no matter what, when all said and done. Even if the reading is below 4, That's like asking how much radiation would I like my family exposed to, I'd say none. So bank on putting the system in either way the results go because Radon is a class A carcinogen and if you smoke you are compounding the risk of the big C. mine was 18 and I reduced it to 0. my system cost me about $350.00 that's with the book and a radon fan kit. Including the 4 inch pvc to go up to the roof from the basement. the book will explain everything. good luck.