Department Of Energy Attic Insulation

Rigid foam boards trap air or another gas to resist conductive heat flow.

Department of energy attic insulation. Types of insulation insulation comes in many different. Enclosed existing wall or open new wall cavities. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. Mineral rock or slag wool.

Insulation level are specified by r value. In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. The table below shows what levels of insulation are cost effective for different climates and locations in the home. A qualified home energy auditor will include an insulation check as a routine part of a whole house energy assessment.

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. The higher the r value the better the thermal performance of the insulation. 1a attic access door. Learn more about where to insulate.

Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity. Blown into place using special equipment sometimes poured in. Most manufacturers use 40 to 60 recycled glass content. 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.

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. 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.