Cold in Canada
Hi all, came across this site a few days ago and haven’t stopped reading.
I think I “over did it”, too much info. 🥴
Now to my question… after you learn about my home.
Edit: north of Toronto
1970’s house single pane windows
2×4 stud wall
Basement not insulated, but has paneling on walls
First floor drywall
2nd floor paneling
To my surprise r-10 Kraft faced fiberglass insulation and 4 mill vapor barrier behind walls and ceiling.
**Not sure what I have for sheathing, I haven’t removed any poly or insulation..I think it’s going to be that black tar impregnated board.
Asphalt shingles-**hoping to install metal roofing
Forced gas furnace.., adding A/c soon.
I have new double pane and triple pane windows (most- casement some sliders, some all aluminum, some vinyl) that I will be installing
I would like to add exterior insulation and new siding
*I feel confident in my window and siding installation (flashing, rain screen, backer rod and caulk)
so here are my question (s)
1. If I install my new drywall as an AIR BARRIER, do I need to remove the Kraft paper from the current existing insulation.
2. Do I reinstall the existing 4 mil poly.
**code is 6 mil**
2a. Do I replace walls and ceiling with 6 mil or Certainteed MemBrain?
Edit: after sleeping on this, I don’t think I can put a vapor barrier can I.? (How will the drywall seal to the framing. )
Edit: I need to use a “paint on” vapor barrier…. right?
3. When I complete the exterior insulation (not 100% sure with what-eps,xps,rockwool) (probably 3″ of eps) / siding WITH a sealed wrb, will it be ok having (2) both the inside air barrier AND the exterior.
And lastly, would it make sense to take the existing r-10 fiberglass
and move it to the attic
(Do I leave the Kraft paper on?) And replace the walls with Rockwool.
(If your recommendation is to remove Kraft paper for question 1, than this for sure makes sense. )
Attic currently has r-10, Kraft faced towards the heated space. This would get me closer to a code compliant attic,
then top it off later.
… ok back to bed.. … .
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