The average cost insulation installations can vary depending on various factors. The range for an install (empty) or upgrade can vary from $700 to $2,000 (plus HST). Some factors include ,but are not limited to:
Size of the property
Type of structure (bungalow, 2 storey, 1.5 storey, etc.)
Pitch of the roof
Ventilation requirements
Location/ Proximity
Type(s) of current insulation installed
Depth or R-value of current insulation installed
Other requirements such as setup, additional materials, attic repairs, and so on