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.
Attic insulation r value maryland.
The r value indicated on the packaging tells how much thermal resistance the insulation provides per.
Department of energy doe published r value recommendations based on specific heating and.
The higher the r value the better the thermal performance of the insulation.
R value is the measure of your insulation s ability to resist heated or cooled air traveling through it.
N a all other ducts.
Second r value is used if more than the insulation is located on the interior.
There are many ways to retrofit a home with fiberglass and.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
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.
Insulation level are specified by r value.
R value is a measure of insulation s ability to resist heat 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.
Maryland energy code a law that lowers energy bills keeps homes safe.
Get a free r value rating as a way to maximize the energy efficiency of both new and existing homes the u s.
According to energystar gov the recommended r value for attic insulation is between r 30 and r 60.
Your home s age if your home is more than 10 year old you likely need more insulation.
In addition atticat insulation provides an amazing r 49 value rating the recommended attic r value rating for the maryland climate zone.
A higher r value means greater efficiency.
The table below shows what levels of insulation are cost effective for different climates and.
If you have cellulose insulation you ll need an inch or two less.
Your home s r value score will guide you toward the type of insulation you need.
An insulation s efficiency is indicated by its r value.
Recommended home insulation r values.
R 8 inside thermal envelope.
Where you live different climates require different insulation r values.
For homes in the dc area the attic should achieve an r value between r 38 and r 60.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
In general an attic s r value should be between r 30 and r 49.
Higher values indicate better insulation.
Achieving greater r values in exterior walls.
In particularly cold climates you might go up to r 60.
The higher the r value the better the thermal performance of the insulation.
