I live in a 100+ years old schoolhouse, that is made from brick. In fact, there are 3 layers of brick around the house (I've drilled 2 holes for ductwork, and it was killer!).
My issue is, there is no insulation on the inside of my house. It's my understanding the 3 layers of brick is creating 2 air pockets, and that's the insulation. Is there any method of adding more insulation (increasing the R value), by injecting something into the air cavities?
To complicate things further, my upstairs still has the original chalkboard and tin walls, so anything I do will be restricted to outside access only.
Is this even possible? Will I even notice a difference?
Thanks in advance,
Has anyone seen my brain today? (^_^)