Mold In New Attic
I have a moisture/mold problem on the underside of my roof decking in the attic that won't go away. My house is a 2 story colonial, built in 1987, in upstate NY. In 2003 I had a new roof (decking & tile) put on my house due to water damage and mold resulting from an ice dam. I now have mold & moisture on plywood decking again. I had a new ridge vent installed with the new roof. Last year I doubled up the proper vents in the sawfits to double airflow to the ridge vent. I blocked off my gabled end vents to prevent competing air flow. I closely monitor the humidity in my house so that is does not excedd 40%. There are no signs of mold, or moisture in the basement, or anywhere else in the house. I have had roofers and insurance adjusters review everything, and they are baffled too. I have sent swabs of the mold to a lab for analysis. Thankfully it is not the "killer" mold, and is only one that occurs frequently in nature, and my wife and child do not have mold alleries or symptons. I am at my wits end as to what could allow the moisture/mold to continue. Any insights to the cause and cure would be appreciated.