Once we penetrate the concrete flooring there are several typed of subsoil material. One is porous gravel and the other extreme is dense clay. There also can be sandy soil or native soil. For porous gravel we use a high volume fan; and for clay we use a high suction fan. The only way to know is when we bore a six inch hole. We use a six inch hole in case there are big boulders under the slab. It is easier to get a big boulder through a six inch hole rather that a four inch hole used by some of our competirtors. We pick the appropriate fan to meet the need of the client.
For sub-membrane we always use a high volume fan.
We use wet cutting as a method to get under the slab. With a standard method, dust is generated and gets in the air and is disbursed everywhere. The wet method distributes water and we collect the water with a wet vacuum.
There are two options that are available for Radon System Installation.
1. Through the garage.
2. On the exterior of your house.
Radon in storage room in basement with Collector pit (RED ARROW).
Pipe through the garage.
Fire collars (RED ARROWS).
The U-tube shows if the fan is running (BLUE ARROW).
The fan is in the attic of the garage
The jack flashing exhausts the radon gas to the exterior (BLACK ARROW).
Radon pit in basement with collector pit (RED). The U-tube shows in the fan is running (BLUE).
The fan in on the outside of the house (GREEN ARROW).
Through the soffet of the roof and exhaust above roof (BLACK ARROW).
Laying perforated drain tile.
Lay down plastic.
Pouring concrete. This what keep the radon down.
This pipe is connected to the drain tile. It forms the passive systems.