SpiralStairs wrote:
It's a clean roof, not in need of repair. A little leakage here and there is how roofs have been made for generations. No reason to be upset.
Insulation is also doing double duty in protecting you from that. It's not supposed to be sopping up water but in doing research into adding insulation to a house I purchased last year, you learn all kinds of things. Even new roofs can let in some water and that insulation is protection. Also, attics are crazy. Nobody has a clue how to properly vent them without serious testing for each space and nobody does that during building. Your attic and your house are supposed to be two sealed areas. The overwhelming majority of homes, even new homes, are going to be venting into one another and that at very least costs you money. It could draw in heat or cold and moisture into your house from the attic, or vice versa. That's why you see improperly vented bathrooms have water damage at the seams where the wall meets the ceiling. The attic is pulling that moisture up and through during a shower.
In this context, fluid dynamics is the name of the game and air is a fluid. It's humid as shit right now where I am. You are going to find water in an attic when the air is saturated. When it is too much, doesn't dry and/or gets past the insulation and into your living area, then you have problems.