Sub-slab depressurization is the most common and effective method of reducing radon soil gas from your home. An four-five inch hole is wet or dry core drilled in the concrete slab using an concrete core drill for a nice clean finished hole with no damaged to the surrounding areas. Dirt and soil(sub slab aggregate) are then excavated to create a pit. A three inch PVC pipe is then sealed into the hole which is referred to as the “suction point”. The idea here is to remove radon gas from beneath the basement floor before it gets in to the living space of the home.

From here the pvc pipe is run to the location where the in-line exhaust fan is installed. The radon fan must be located in a ventilated attic space,garage or outside, not in the basement. From the exhaust fan the pipe must extend to the roof line where the radon gas will be exhausted safely.  Other things that may require attention would be sump pits,  floor drains, slab to wall gaps, floor cracks, and fractured control joints. Installing this kind of radon system is usually completed in one day. 

Sump Pit Depressurization

The sump pump cock is used as the suction pit. PVC pipe is run into sump pit and the homes existing drain tile is utilized for a good pressure field extension. The fan is applying a vacuum to the sump pump pit and radon gas can be collected and discharged outside. The sump pit is also sealed using silicone caulk

Sub Membrane Depressurization

A two or three inch PVC pipe is sealed into the membrane which is referred to as the “suction point”. From here the pipe is run to where the radon exhaust fan is installed which must be in either a ventilated attic space or outside.