Yep we have a small leak

The builder was great. Climbed all the way back to the problem area and looked around. Found some moist insulation and noticed a bit of a leak in the vent for the furnace. Might be a moisture problem it might be a leak. Called the heater contractor and they will call me tomorrow. They are trying to sort out how they are going to fix it, maintance or installation. Do I have to pay to get it fixed or do they fix it for free. At any rate, hopefully it will be fixed and dried out sometime next week. Then I have to paint the drywall areas that are discolored.