Questions about new siding and exterior insulation
1. Siding: We are going to use vinyl and stone. For the stone it seems all the contractors we met are going to use "Beonstone", and we are fine with it. But for the vinyl we have several options: Mitten, Gentek, Kaycan and Batiment Royal. Do you recommend any of this vinyl brands over the rest?
2. Exterior insulation: Here basically we have two different options. We have contractors that want to put 1 ½ inches of rigid panels (R7 aprox) and say putting more than that is impossible, too much or not worthy. Also, these contractors say using urethane for exterior insulation is bad, because the house won't breathe (we installed an HRV on 2019). Then we have contractors that say we should put at least 2 inches of urethane, up to 4 inches. Our plan right now is to put 3 ½ of urethane (R20 aprox). We already spent one winter in this house and is really really cold (it's located in Laurentides, Quebec), so we prefer spend our money in insulation better than on the hydro bill. Our basement right now is R20 and our attic is R21 (but we plan to improve it to R50 o R60 before the winter using fiberglass). So the question is: if we put 3 ½ of urethane on the exterior walls is it true the house won't breath, is too much, overkill etc?
Thanks for the help guys!