We have added a couple of bedrooms and a bath to the attic area of a 80+ year old farmhouse. We built 5 foot knee walls, insullated with R19 and 1/2" foam board on the attic side. Then 6ml vapor barrier and 1/2" sheetrock on the room side. The sloped ceiling is 2x6 rafters so we installed vent chutes (1" air sppace),R21 insulation, 6ml vapor barrier and 1/2" sheetrock. In the open attic area we blocked off the cavities under the new floor and insultaed the open area to R38 and have vent chutes in every rafter cavity to the soffit.
We have a continous ridge vent and continous soffit vents but have a lot of condensation in the open attic area and between the vent chutes and the insulation in the sloped ceiling.This only happens on the North side of the house where it doesn't get any sun in the winter. We live in NE Kansas.
Any ideas would be greatly appreicated.:confused: