basement insulation. What R value is needed in Ontario?
I think I've made a mistake and am worried I've not put enough XPS insulation up before building my studs.
due to cost (I know) I went for 1" Owens XPS - R-5 (RSI-0.88) thinking the code was R-15. So this plus R14 of the batts would take me well over that
Now I'm hearing the required R value is 20, which means I am below code if I use the standard R-14 batts (Rockwool or Owens fibreglass)
So when the inspector comes round to view my installation, am I going to have to rip down my walls and put the thicker R7.5 XPS boards with R-14 batts - to take me up to 21.5?