Attic Insulation R Value Maryland

For homes in the dc area the attic should achieve an r value between r 38 and r 60.

Attic insulation r value maryland.

Most areas of the country have a higher minimum r value recommendation but just about everywhere recommends up to r 60. Recommended home insulation r values. The table below shows what levels of insulation are cost effective for different climates and. There are many ways to retrofit a home with fiberglass and.

If you have cellulose insulation you ll need an inch or two less. N a all other ducts. In general an attic s r value should be between r 30 and r 49. The higher the r value the better the thermal performance of the insulation.

Get a free r value rating as a way to maximize the energy efficiency of both new and existing homes the u s. Your home s r value score will guide you toward the type of insulation you need. A higher r value means greater efficiency. Second r value is used if more than the insulation is located on the interior.

The higher the r value the better the thermal performance of the insulation. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Maryland energy code a law that lowers energy bills keeps homes safe. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

According to energystar gov the recommended r value for attic insulation is between r 30 and r 60. However the climate that you live in will determine the r value level required to effectively keep your home at a consistent comfortable temperature. The r value indicated on the packaging tells how much thermal resistance the insulation provides per. An insulation s efficiency is indicated by its r value.

In addition atticat insulation provides an amazing r 49 value rating the recommended attic r value rating for the maryland climate zone. In particularly cold climates you might go up to r 60. Insulation level are specified by r value. Duct r value supply in attic.

Department of energy doe published r value recommendations based on specific heating and. R value is the measure of your insulation s ability to resist heated or cooled air traveling through it. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. R 8 inside thermal envelope.

Where you live different climates require different insulation r values. Achieving greater r values in exterior walls. If your attic has fiberglass batts you should have an r 49 layer of insulation at minimum which is around 12 or 13 inches thick. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.