Wall assemblies - renovation
Thermal overcoating: a technical manual for high-performance exterior retrofits
...outsulation
To ensure the existing wall cavity remains permanently dry, you must follow the 2/3 - 1/3 insulation rule for cold climates (specifically Climate Zones 5-7 in the US and Canada). The R-value of the exterior insulation must be high enough to keep the interior sheathing above the condensing temperature.
For e...
