Hello, planning to add insulation to a house built in '49.
Conditions:
Must be insulated inward as the facade is "culturally and historically valuable."
The house is LARGE, so there's nothing to gain from "saving a few cm" in relation to heating/comfort.
Heating is planned to be via comprehensive waterborne underfloor heating instead of current radiator heating.
All windows are being replaced with triple-glazed low-energy windows.
The house will have mechanical ventilation.
Previous construction:
Stucco-Plank wall-air barrier-lathing?-Tongue and groove panel-Tretex board-wallpaper
Now it's time to add insulation, and I have some questions.
So I thought I'd see if there's anyone with experience/knowledge and constructions from the early 50s and renovating these.
My idea was to try to insulate as much as possible but understand that we can't push the plank wall too far from the heat. For some reason, I have between 45-70mm as max in my head but don't know where I got this from. Does anyone know better, i.e., what would be the optimal amount of insulation without the plank wall construction being damaged in the long run?
Proposed construction:
1. Stucco-Plank wall-lathing?-air barrier-70mm wood fiber insulation-vapor barrier-OSB-Gypsum board
2. Stucco-Plank wall-70mm wood fiber insulation-vapor barrier-OSB-Gypsum board
I also have questions about what I've perceived as lathing between the plank wall and the tongue and groove plank wall... is ventilation needed between the plank wall and insulation, or is it just extra work without any real gain? Could what I've perceived as lathing (about 1cm) have just been to be able to put up the tongue and groove planks relatively straight and easily (as opposed to nailing them directly to the plank wall)?
Conditions:
Must be insulated inward as the facade is "culturally and historically valuable."
The house is LARGE, so there's nothing to gain from "saving a few cm" in relation to heating/comfort.
Heating is planned to be via comprehensive waterborne underfloor heating instead of current radiator heating.
All windows are being replaced with triple-glazed low-energy windows.
The house will have mechanical ventilation.
Previous construction:
Stucco-Plank wall-air barrier-lathing?-Tongue and groove panel-Tretex board-wallpaper
Now it's time to add insulation, and I have some questions.
So I thought I'd see if there's anyone with experience/knowledge and constructions from the early 50s and renovating these.
My idea was to try to insulate as much as possible but understand that we can't push the plank wall too far from the heat. For some reason, I have between 45-70mm as max in my head but don't know where I got this from. Does anyone know better, i.e., what would be the optimal amount of insulation without the plank wall construction being damaged in the long run?
Proposed construction:
1. Stucco-Plank wall-lathing?-air barrier-70mm wood fiber insulation-vapor barrier-OSB-Gypsum board
2. Stucco-Plank wall-70mm wood fiber insulation-vapor barrier-OSB-Gypsum board
I also have questions about what I've perceived as lathing between the plank wall and the tongue and groove plank wall... is ventilation needed between the plank wall and insulation, or is it just extra work without any real gain? Could what I've perceived as lathing (about 1cm) have just been to be able to put up the tongue and groove planks relatively straight and easily (as opposed to nailing them directly to the plank wall)?