Anytime we depressurize a drain tile loop we want to ensure an airtight seal around the basement and often replace the current sampled to achieve this. Sometimes we will use a sump basin as a suction point, but coring through the concrete to access the drain tile will produce similar results. This system routes into the garage and locates the radon fan in the attic space above. Levels 0.3pCi/L
Our diagnostics determined the best location for this system to be underneath the stairs of the basement. Coring through both the garage slab and block wall we were able to route a system to the homeowners request producing great results – 1.1 pCi/L!
In this garage run, we used the sump as our suction point. When we choose this method of depressurization we will always add a rubber discount to the pipe making it simple for when the sump must be accessed. Results 0.4 pCi/L
By performing qualitative PFE, we were able to determine that the drain tile loop reached the furthest corner of the basement from the sump giving us good airflow at all points under the basement slab. From the garage, we had to jog our pipe horizontally to avoid the firewall which separates the unconditioned space of the garage attic from the bedroom on the other side.
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