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Exterior Inspections Contains discussions about the exterior portion of a home inspection. This includes roofs, gutters, downspouts, decks, patios, windows, etc.

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  #1  
Old 4/17/13, 8:22 PM
Mike Corello Mike Corello is offline
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Default Radon mitigation system - vent system doesn't terminate about roof line

I just purchased a home with a recently installed radon mitigation system. The system vents through the basement and then upwards in a PVC pipe on the side of the house. The problem is that the vent terminates about 2/3rds of the way up, whereas my understanding is that according to EPA code it should extend at least a couple feet above the roof line to prevent re-entry of radon gas into the home. Note: I don't have any windows or doors on this side of the house.

Do you guys think I need to bother the radon system installer to have the exhaust system fixed?

Here's a photo of the system:

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  #2  
Old 4/18/13, 9:07 AM
Jeffrey R. Jonas's Avatar
Jeffrey R. Jonas Jeffrey R. Jonas is offline
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Default Re: Radon mitigation system - vent system doesn't terminate about roof line

Looks like the installer met the 10ft horizontal to windows rule, but it MUST still rise above the roof plane at least 12 inches.

Note: exterior systems are generally frowned upon in cold climates (I see snow and weatherized hose bibb's) from excessive condensation and load on externally mounted fans. Also note, the 45 degree angle fitting on the end of the vent piping which will exacerbate the problems by collecting rainwater and buildup of ice.

Yes... it needs to be corrected.
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Old 4/18/13, 10:59 AM
Mike Corello Mike Corello is offline
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Default Re: Radon mitigation system - vent system doesn't terminate about roof line

Jeffrey, thank you sir very much for your thoughts. I assume then that instead of a 45 degree vent it should be 90 degrees to keep water out?
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  #4  
Old 4/18/13, 11:32 AM
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James L. Keilson, CMI James L. Keilson, CMI is offline
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Default Re: Radon mitigation system - vent system doesn't terminate about roof line

I would agree with Jeff. I do a fair share of Radon work and see a ton of mitigation systems. The discharge pipe needs to extend past the roof line as Jeff mentioned.

Jim




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  #5  
Old 4/18/13, 11:39 AM
Troy Weiland Troy Weiland is offline
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Default Re: Radon mitigation system - vent system doesn't terminate about roof line

Agree it needs correcting. I have attached EPA recommendations.
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radon-mitigation-system-vent-system-doesnt-terminate-roof-line-radon1.jpg.jpg  





Troy Weiland
Weiland Inspection Services, LLC
Marshfield, WI
http://weilandinspections.com
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