Hi;
I have a north, upper corner of a room that is a cold spot that suffers condensation, and I am wondering how to fix it.
Complicated story:
1968, 2x4" frame house with ~R12 batt insulation in the walls.
Soffit level under the eaves about ~3" below the level of the inside ceiling.
Soffits were not properly vented.
Attic had fiber glass batt insulation, ~R20
So, last year:
-added ~R30 cellulose insulation to the attic and did significant improvements to lower air infiltration from the living space to the attic (although still more to do).
-resided exterior; the contractors added 1.5" foil backed insulation board to the exterior, seam taped under the new siding...
But: The new layer of insulation only extends up to the level of the old soffits, so the top ~3" of wall is less insulated than the rest.
And, the contractors added ventilation to the soffits.
So now:
-cold air can flow in through the soffit to the attic (as is proper), but it flows past the top 3" of wall, which is now a cold corner.
Does anyone have ideas or pointers?
I know this a stupid sequence of events.
I am wondering about injecting foam insulation from the inside, into the top of the walls?
Getting to the corner of the attic is almost impossible.
cheers, Doug
I have a north, upper corner of a room that is a cold spot that suffers condensation, and I am wondering how to fix it.
Complicated story:
1968, 2x4" frame house with ~R12 batt insulation in the walls.
Soffit level under the eaves about ~3" below the level of the inside ceiling.
Soffits were not properly vented.
Attic had fiber glass batt insulation, ~R20
So, last year:
-added ~R30 cellulose insulation to the attic and did significant improvements to lower air infiltration from the living space to the attic (although still more to do).
-resided exterior; the contractors added 1.5" foil backed insulation board to the exterior, seam taped under the new siding...
But: The new layer of insulation only extends up to the level of the old soffits, so the top ~3" of wall is less insulated than the rest.
And, the contractors added ventilation to the soffits.
So now:
-cold air can flow in through the soffit to the attic (as is proper), but it flows past the top 3" of wall, which is now a cold corner.
Does anyone have ideas or pointers?
I know this a stupid sequence of events.
I am wondering about injecting foam insulation from the inside, into the top of the walls?
Getting to the corner of the attic is almost impossible.
cheers, Doug