Insulation is a cost-effective way to dramatically cut your air conditioning bills. That heat conducts through the roof to the ceiling. For a typical home, the insulation will cost little more than a single window air conditioner.
Ceiling insulation improves comfort and cuts electricity costs.
The insulation pays for itself in 1 to 2 years. Notes show how each alternative can be used to meet the Hawaii Model Energy Code requirements for roof insulation. Cellulose or Fiberglass Cellulose or Fiberglass Insulation provides the most cost effective performance. Blown-in cellulose or fiberglass and fiberglass batts are similar in cost and performance. Recycled cellulose insulation may be available.