So we installed a new roof this summer and fall. We live in the Midwest with higher humidity. we went to do more renovations and noticed mold/mildew and condensation dripping off of the nails and the outer walls in between the wood. The decking is not showing any wetness, but the mold where it meets the rafters.
We have rafters with absolutely no soffits as there is no room to even add any. We originally had gables with gaps here and there as this house is very old. There was a Whirly bird vent that we did not reinstall. We added a ridge vent with the gables and left the bottom ridge open so air could come in.
We have since gotten more insulation, sealed up the lower edge leaks and any other nook or cranny where hot air from the house could possible get to the attic. A gable vent fan is getting put in as well with a humidifier so that it will turn on if the humidity gets too high.
We are also planning on getting rid of the ridge vent since we have read this has changed to the new intake nullifying the two gable vents.
Now, we have one room that is a dormer with absolutely no ventilation other than it’s own separate ridge vent aside from the main part with the gables. That’s all molded too.
The old roof was wood shake with decking on top and two more layers of shingle. Never had a problem and it only had gables.
Please help as the internet is no use… half say ridge vents work with gables and other things, the other half say they don’t. We want to save our roof and fix the problem. Thank you. !