- Adding insulation to exterior
walls increases the likelihood of damage to framing and cladding
components as a result of moisture accumulation
- Older homes often did not have
vapour barriers intentionally installed
- Insulation reduces the
temperature of the outer wall cavity which can lead to
condensation
- If the wall leaks, added
insulation can hold the water
- Exterior siding, flashing and
caulking should be checked and repaired to prevent
leaks