Frequent temperature changes
Leaks, mold and water damage
- mold growth
- stains on the ceiling and walls
- pests like roaches and rats
- damaged wallpapers
- rotting wood which causes it to lose its structural integrity
Questionable air quality
Pollen, dust, dirt and other microscopic things can enter the house. Without proper insulation to filter these out, you could be stuck breathing air with questionable quality.
On the other hand, if your insulation hasn’t been upgraded in a while, it could be the very thing that’s polluting your air.