Vented vs. non-vented attic
I live in zone 2A. I am building a raised home for myself. It has a galvalume roof laid on top 2x4 strapping which is over 3/8-inch sheathing with a radiant barrier underneath.
It is an equal span gable, 8/12, with living upstairs. A ridge vent sits on top of the roof.
I was planning to insulate the roof with foam inside the knee walls up until the ceiling levels out at 9 vertical feet. I figured on the 2" airspace.
I want to use open cell foam with damp spray cellulose. Is this a good system for Louisiana north of Lake Pontchartrain?
Posted Thu, 07/28/2011 - 10:48
Edited Thu, 07/28/2011 - 12:14
Other Questions in GBA Pro help
Since drywall has a permeance of 0.02 liter/sec - m at 75 PA is ever possible to have sheathing dry to the interior of the home?