Department Of Energy Attic Insulation

R value is a measure of insulation s ability to resist heat traveling through it.

Department of energy attic insulation.

Most manufacturers use 40 to 60 recycled glass content. The higher the r value the better the thermal performance of the insulation. Types of insulation insulation comes in many different. Benefits of insulation on average you can save up to 20 on your home s heating and cooling costs or up to 10 on its total energy costs by adding insulation to attics floors crawl spaces and accessible basement rim joists and by reducing unwanted air leaks all around your house.

Learn more about where to insulate. Loose fill insulation must be applied using an insulation blowing machine in either open blow applications such as attic spaces or closed cavity applications such as those found inside existing walls or covered attic floors. Insulation materials run the gamut from bulky fiber materials such as fiberglass rock and slag wool cellulose and natural fibers to rigid foam boards to sleek foils. A qualified home energy auditor will include an insulation check as a routine part of a whole house energy assessment.

Rigid foam boards trap air or another gas to resist conductive heat flow. Blown into place using special equipment sometimes poured in. 1a attic access door. Insulation level are specified by r value.

In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. Before you insulate you should make sure that your home is properly air sealed. Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity. An energy assessment also known as a home energy audit will also help identify areas of your home that are in need of air sealing.

Mineral rock or slag wool. The table below shows what levels of insulation are cost effective for different climates and locations in the home.