What happens if you have poor insulation? Attic insulation prevents the outside temperature from entering your house and keep ... ing the inside temperature constant. This waves off the load on your heating device, and they do not have to work vigorously. However, if this insulation is ripped or damaged, you might notice that your energy bills are suddenly going up. Insulation Companies in Oakland, CA, use two types of attic materials: • Fiberglass • Cellulose Contact us now for professional services! read more