A homeowner recently remodeled but they were still experiencing high energy bills. During the first winter of the renovation, condensation in the attic was developing to the point that water was dripping into the newly remodeled areas of the home and the roof sheathing was beginning to show signs of deterioration.
Upon evaluation we found that the attic insulation had been disturbed during the renovation. The attic floor also had many gaps and penetrations from plumbing, electrical and framing components that had not been air sealed (typical for the age of the home). We also found that a whole-house humidifier was set to allow higher than recommended levels of indoor humidity during peak winter periods. We discovered that conditioned, moisture-laden air was migrating into the attic and forming frost on the underside of the roof. This migration was likely increased unintentionally due to upgrades in the home’s windows, doors and siding during the renovation.
Kinzler removed the damaged and wet insulation so that the attic floor could be properly air sealed, stopping the conditioned air from escaping into the attic and ventilation chutes were installed to allow for proper ventilation of the attic. A skim coat of spray-applied foam was installed on the entire attic floor for a complete air seal and supplemental fiberglass was installed to meet code R-values. The customer also consulted the manufacturer of the whole-house humidifier for recommended settings based on outdoor temperatures.