Exterior retrofit / Green Building & Sustainable Home Renovation Information & Advice

...exterior sheathing. This leads to condensation, mold, and rot. The math of 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 en...

...exterior with great ease. And since an uninsulated stone house is just rock on the inside and outside, the options for insulation involve completely altering either the interior or exterior. Neither of those options is very appealing, as you lose the heritage look either outside or inside, so right off the bat, the fir...