4.9 
Cleanspace
Cleanspace is placed for a complete vapor barrier and to lower the radon levels in the home.
Tightly Sealed
The radon system extends to the outside of the home but is tightly sealed with SprayFoam insulation.
Manometer
The manometer constantly shows that the system is working properly and is under negative pressure.
Radon System
The radon system is placed neatly on the outside of the home.
