Laserfiche WebLink
OR r � y Copy <br /> Radon Reduction System <br /> ❑ Sub-floor Preparation <br /> o Add a 4" uniform layer of clean aggregate that will pass through a 2" <br /> sieve and be retained by a 1/4" sieve <br /> ❑ G-mil poly over entire sub-floor <br /> o Lapped a minimum of 1 2" (previously 6") <br /> o All punctures or tears must be sealed or covered with Poly <br /> U Seal all entry points <br /> o Polyurethane caulk or elastomeric sealant on openings around bathtubs, <br /> showers, pipes, wires, etc. <br /> o Polyurethane caulk or elastomeric sealant on all concrete joints and the <br /> joint between the slab and foundation wall <br /> o Polyurethane caulk or elastomeric sealant to fill joints, cracks, or other <br /> openings in foundation walls <br /> o Gasketed sump lid is required <br /> ❑ Minimum 3" ABS or PVC gastight pipe <br /> o Must go from the sub-slab base and run all the way through the building <br /> floors and terminate at least I 2" above the surface of the roof <br /> o Can be installed into the gravel with a "T" fitting. <br /> o If we install 10' of perforated pipe, can include elbows <br /> o Route the pipe through conditioned space <br /> o Locate the end of the pipe that terminates on the roof at least I 0' from <br /> any window or other opening in the dwelling that is less than 2' below the <br /> exhaust point. The end of the pipe must also be at least I 0' from any <br /> window or other opening in adjoining or adjacent buildings <br /> o There must be a minimum of 24" in diameter (pipe serving as the axis) <br /> around the pipe by a vertical distance of 3' to allow for the installation of a <br /> fan in the attic in case the homeowner chooses to change the radon ready <br /> system into an active radon remediation system <br /> U Label the Vent Pipe <br /> o At least once per floor * in accessible attics, the pipe must be labeled <br /> with the words <br /> • "RADON REDUCTION SYSTEM" <br /> ❑ One electrical receptacle in the attic <br /> o Must be near the pipe where a fan would be located if the homeowner <br /> chooses to install an active system after construction <br /> ❑ Active System <br /> o An active system can be installed <br /> o With an active system you are required to install a continuously exhausting <br /> fan and monometer or other system monitoring device <br /> Architectural Manager Page 4 6/8/2009 <br /> J <br />