First post - a question. Apologies for being clueless; I was not able to find an answer via searching the forum.
I'm house shopping in an area with lots of old stone and brick houses (100-150 yrs old) that are drafty and energy inefficient. Can these homes be made airtight without using spray foam and without removing the wooden framing?
Is it possible install foam panels between and inside the framing, creating thicker walls but achieving airtightness and greater R-value? Wouldn't that trap the wooden framing in a cold and moist space between the (Taped) foam panels and the stone wall, creating a mold risk?
Can rigid foam panels be installed between joists using spray foam at the edges, to minimize the use of spray foam and still achieve some airtightness?