I have an issue that is very concerning to me and would truly appreciate expert advice --
My home is a 1899 foursquare with a copper architectural shingle roof. The roof is approx. 10-15 years old. All work described here was done by the prior owner who is an architect.
The attic is finished and has three knee wall areas -- one across the entire back and corners, and one at each of the front corners of the house.
The soffits have been vented with 3" round vents. However, the roof is not vented. Batt insulation fills the entire void between the roof/framing and the sheetrock ceilings.
Batt insulation also runs down the knee walls.
There are random-width floorboards across the entire attic space, including in the knee walls. In some places the floorboards cover the soffit bays so that they don't seem to provide much ventilation.
In some places there is loose (cellulose?) insulation between the floorboards and the plaster ceiling below.
My question, finally, is how should I insulate and ventilate (or not) this space? I had two insulation contractors recommend two different approaches: One contractor would seal the soffit vents and insulate the roof in the knee wall area with rigid foam, where the roof is not currently insulated. The other contractor would dense-pack insulation under the attic floor where the knee walls meet the floor and leave the soffit vents alone.
I know the correct thing to do would be to tear off the roof or the sheetrock ceilings and install baffles and ridge vents, but that is almost certainly cost-prohibitive. Is one of the other approaches recommended by these contractors the way to go?
In addition, I just discovered a bath vent open to one of the front corner knee wall areas. Does this need to be vented through the roof or could I direct the vent to a sofit (there happens to be good access to a large rectangular soffit vent -- presumably installed for that purpose at one point in time).
Thank you in advance for your help
By the way, I am located in Maryland if that makes a difference.
My home is a 1899 foursquare with a copper architectural shingle roof. The roof is approx. 10-15 years old. All work described here was done by the prior owner who is an architect.
The attic is finished and has three knee wall areas -- one across the entire back and corners, and one at each of the front corners of the house.
The soffits have been vented with 3" round vents. However, the roof is not vented. Batt insulation fills the entire void between the roof/framing and the sheetrock ceilings.
Batt insulation also runs down the knee walls.
There are random-width floorboards across the entire attic space, including in the knee walls. In some places the floorboards cover the soffit bays so that they don't seem to provide much ventilation.
In some places there is loose (cellulose?) insulation between the floorboards and the plaster ceiling below.
My question, finally, is how should I insulate and ventilate (or not) this space? I had two insulation contractors recommend two different approaches: One contractor would seal the soffit vents and insulate the roof in the knee wall area with rigid foam, where the roof is not currently insulated. The other contractor would dense-pack insulation under the attic floor where the knee walls meet the floor and leave the soffit vents alone.
I know the correct thing to do would be to tear off the roof or the sheetrock ceilings and install baffles and ridge vents, but that is almost certainly cost-prohibitive. Is one of the other approaches recommended by these contractors the way to go?
In addition, I just discovered a bath vent open to one of the front corner knee wall areas. Does this need to be vented through the roof or could I direct the vent to a sofit (there happens to be good access to a large rectangular soffit vent -- presumably installed for that purpose at one point in time).
Thank you in advance for your help
By the way, I am located in Maryland if that makes a difference.