Gallery    Radon Installation Contractors LLC   P.O. Box 10023  Alexandria, Virginia 22310    703.971.0717      ric@radonone.net Design and Installation of Radon Mitigation Systems www.RadonONE.net (Sub-slab ventilation system through slab on grade floor, up through interior of house to radon fan installed in attic through flashing on roof) (Sub-slab ventilation system through basement floor and sub-membrane ventilation system through polymer sheeting in crawl space area. Exiting out the right side of house to a radon fan and continuing up exterior of the house to above roof line.)   (Sub-slab ventilation system (Split level house)  through lower basement slab and upper slab up through interior of the house, a radon fan installed in the attic through flashing on roof. On this type of mitigation installation requires to mitigate both lower and upper slabs. By adding suction points to the lower and upper slabs will reduce the radon gas levels.) Next Gallery (Sub-slab ventilation system through basement floor sump pump cover, up and out through the side wall of house to a radon fan and continuing up exterior of house to above roof line. r Radon Pipe Radon Pipe Radon Pipe Radon Pipe Radon Pipe Radon Pipe Radon Pipe Radon Pipe Sump pump cover Radon fan Radon fan Membrane polymer sheeting Vacuum Gauge Back Radon  Installation Contractor