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<div align="left" style="text-align:left;"><font face="Times New Roman" size="+0" color="#000000" style="font-family:Times New Roman;font-size:12pt;color:#000000;">An acquaintance in southern RI suffered substantial mold/mildew problems in the wake of torrential rains and consequent flooding in this region last Spring. The damage has been repaired in all areas of their home except the attic, where there may have been some leakage, and where there has certainly been a longstanding moisture problem. This is a standard
split level ranch, with partial cathedral ceiling and otherwise what was intended to be an unheated attic. As we all know, these attics are often subject to a lot of air leakage, and this one is neither well sealed from the conditioned space, nor well ventilated. The homeowner needs to either create the proper vented, unconditioned attic, or switch to an unventilated roof assembly. There is no ductwork in the attic, so they could reasonably go with either option. Here, though, is the question I want to pose to you: if they were to choose an unventilated attic and spray closed cell foam against the interior of the roof sheathing and around truss chords, is there any need to treat the heavily mildewed sheathing first? If so, any suggestions about appropriate treatment? The homeowner is being deluged with conflicting recommendations from moisture remediation outfits. One contractor recommended complete replacement of the 8-year-old asphalt
shingle roof, which does not appear damaged but they would replace the mildewed sheathing at the same time.</font></div>
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<div align="left" style="text-align:left;"><font face="Times New Roman" size="+0" color="#000000" style="font-family:Times New Roman;font-size:12pt;color:#000000;">Thanks, as always, for any advice.</font></div>
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<div align="left" style="text-align:left;"><font face="Times New Roman" size="+0" color="#000000" style="font-family:Times New Roman;font-size:12pt;color:#000000;">George Tremblay</font></div>
<div align="left" style="text-align:left;"><font face="Times New Roman" size="+0" color="#000000" style="font-family:Times New Roman;font-size:12pt;color:#000000;">Troy, NH</font></div>
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