DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Roofing and Siding > new home Insulation in basement getting wet.





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Old 04-04-2013, 05:31 PM  
GBR
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I too, think it is your sump pump discharge line leaking at a fitting. Pull the insulation, dry framing with hair dryer, add water to run sump, watch and feel for leaks. It could also be an exterior fitting wetting/spraying the siding/sheathing/housewrap under the vinyl siding, running back inside through joint of joist/mudsill (especially is H.W. is not lapped over mudsill). If in a heating climate, you may want to change your fiberglass for rigid foamboard after air-sealing the wood rim joists. http://www.buildingscience.com/documents/information-sheets/critical-seal-spray-foam-at-rim-joist/files/bscinfo_408_critical_seal_rev.pdf

On a lesser note; the fiberglass is stopping the uncovered sump well water and condensing there due to the furnace leak at the elbow ducting blowing air/moisture vapor constantly in that bay.
Gary



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