A well running attic is critical for your home’s comfort… and to prevent water damage! If your home was built circa mid-1980s it is likely that all your attics are broken (unless someone fixed them already). My father, a building inspector, tells me this was because it was fashionable to blow in insulation in the 70’s/80’s but no baffles were pre-installed to keep the soffits from being blocked. This is an inexpensive repair and well worth the effort. Check that soffits are not blocked and that there are gable vents. An active vent may indicate a work-around as all you need is inactive vents if the soffits are not blocked. What happens if your attic is broken? Interior is extremely hot in hot weather, extremely cold in cold weather. Air conditioners work overtime. Ice dams occur. You will get water damage (with mold & rotting wood) at extremely cold temperatures (-30C / -22F) due to the temperature differentials (ask me how I know).