We have a potential problem in our new attic storage area, and I'd love some advice on how to avoid a problem developing. Roofers? Any solid advice?
Our carpenter put in a pull down ladder and a floor in our attic, then (uninsulated) knee walls, and an insulated, vapor barriered ceiling, cutting out gaps in the plywood ceiling for the existing roof vents.
The studs are 2x6 so he put in R12 insulation (designed for 2x4 construction) and a vapor barrier before putting on the ceiling plywood. With any luck this preseved an air channel for air flow.
On speaking to our roofing company after the fact, they described a system of styrofoam venting channels that perserve a 2" airspace between insulation and the roof deck, so that condensation shouldn't be a problem.
I'm hoping that if we have the ceiling, insulation and vapor barrier removed, then put in the styrofoam venting channels he described, that we should have no issues with condensation, but on reading an earlier thread (2007?) in this chatroom, I'm not reassured that it will make a difference.
Can anyone give me details on how the styrofoam channels work, and if there is any way to make sure that the insulated attic room doesn't turn into the worst mistake we could have made in the house?