Brody Ekberg wrote:
Michael Helmersson wrote:
Brody Ekberg wrote:
Our walls, from inside out are drywall, fiberglass insulation, plywood sheathing, tar paper then aluminum siding with that backer board.
No vapor barrier then?
Not unless the fiberglass insulation backing or tar paper counts. And actually our walls arent just drywall. They seem to be 1” thick made of 2 separate layers. The layer closest to the outside seems like drywall but the layer we can see inside the house seems different. Its harder than regular drywall. Can’t pound a nail in without busting chips out. Its like drywall but harder. And not all uniform thickness. The 2 attached pictures were taken from a single piece I cut out of the wall and theres almost 1/8” different in thickness
I admjt to being lazy about reading this whole thread, ans this might already have been answered, but it looks like plaster over rocklath. I have it too. It was kind of a intermediate step between drywall and plaster, with all the advantages, and disadvantages of both. I actually really like it (when I am not trying to hang something from the wall).
Very off topic but to pound a nail, predrill. Cut any holes with a diamond tipped saw and expect a ton of dust. Do not use drywall anchors. To find studs, buy a 'Stud Pop's magnetic stud finder. The rocklath is secured by nails over the studs.
Back to your actual question...
My solution to uneven heat in a house I try to spot heat with a cheaper source, (pellets/wood), while keeping cold and moisture in check, is to run my boiler for a few hours each day, usually first thing in the morning to bring the house up to temp after I let it cool off overnight and restart the stove. In my case, I do it to prevent freeze, but it would also likely help your moisture issues. I dramatically lower my oil consumption by doing this, vs. running just oil, and IMO the house is more comfortable. Seeing those pics, I wonder if the discolouration in the floors of the two back bedrooms is from the previous people doing what you were doing...
Long term, I plan to add mini split heating to that side of the house, but this works for now and is cheaper than mold issues or a frozen pipe in my basement. If I were you, and considering installing a basement woodstove, I would put it on the opposite side of the house from the upstairs stove - I have one in the basement and one on the main floor, both on the same side, which STILL leaves the back bedrooms cold even when I run both.
Also - for circulation with fans, push cold air along the floor towards the stove, with fans at floor level, not towards the bedrooms. For warm air, run ceiling fans to wash it down the walls, or fans in the top corners of doorways, pushing warm air to the bedrooms, which, as it cools and sinks, gets returned by the lower fans. You want to create a circulation pattern of air.
I'm also considering insulating my rim joists. I've been mulling just Rockwool, since I also have concerns about spray foam and rot in a humid climate with a house with no vapour barrier... Plus, Rockwool is inflammable and doesn't offgas. Other sources say my plan will CAUSE rot because it causes condensation on the surface of the joist, so I keep mulling it and haven't done it. So this is certainly not advice.