Attic Insulation R Value Maryland

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Attic insulation r value maryland.

If you have cellulose insulation you ll need an inch or two less. A higher r value means greater efficiency. In general an attic s r value should be between r 30 and r 49. An insulation s efficiency is indicated by its r value.

The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value. Where you live different climates require different insulation r values. Your home s age if your home is more than 10 year old you likely need more insulation.

Second r value is used if more than the insulation is located on the interior. Maryland energy code a law that lowers energy bills keeps homes safe. Duct r value supply in attic. The higher the r value the better the thermal performance of the insulation.

The table below shows what levels of insulation are cost effective for different climates and. 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. R 8 inside thermal envelope.

Department of energy doe published r value recommendations based on specific heating and. 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. For homes in the dc area the attic should achieve an r value between r 38 and r 60. In particularly cold climates you might go up to r 60.

In addition atticat insulation provides an amazing r 49 value rating the recommended attic r value rating for the maryland climate zone. The r value indicated on the packaging tells how much thermal resistance the insulation provides per. R value is a measure of insulation s ability to resist heat traveling through it. N a all other ducts.

R value is the measure of your insulation s ability to resist heated or cooled air traveling through it. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. There are many ways to retrofit a home with fiberglass and. Higher values indicate better insulation.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Most areas of the country have a higher minimum r value recommendation but just about everywhere recommends up to r 60. According to energystar gov the recommended r value for attic insulation is between r 30 and r 60. 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.