Originally Posted By: Steven Brewster
This post was automatically imported from our archived forum.
Inspected this home yesterday and found what I think is moisture intrusion and lack of ventilation on the NW sections of the roof structure. The roof covering is 16 yrs. asphalt dimensional type, pitch >8/12. None of the power roof vents functioned and the small soffit vents louvers were obstructed by paint and improperly installed insulation (obstructed ventilation). Never seen this much staining, it almost looks like thinned roofing tar in some areas. Moisture content in these blacken areas ranged from 8% to 18%. None stained areas had 8% mc. I would appreciate shared thoughts.
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1050436.JPG ]
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1050441.JPG ]
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1050443.JPG ]
Could not access this area in the attic space (no access) but it appears that the lack of ventilation and roof covering failure has damaged the decking.
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1050449.JPG ]
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1050447.JPG ]