Poor roof ventilation can cause a host of problems. The vast majority of homes in the Minneapolis area have insufficient roof ventilation, so when we're called onto a project, we assess how we can improve the ventilation to prevent mold growth and improve the home's energy efficiency. This home was unique in that it didn't have an attic, which usually provides some extra working space for ventilation.
After the evaluation, we ended up replacing 7 vents, and the ventilation was sufficient to keep air moving through the house and back outside. We installed new Owens Corning Duration shingles in Onyx Black and removed and replaced the gutters with new 5" seamless aluminum gutters in White.