Attic Insulation R Value Maryland

Value r 10 continuous or r 13 cavity 15 continuous or r 19 cavity duct r value supply in attic.

Attic insulation r value maryland.

For homes in the dc area the attic should achieve an r value between r 38 and r 60. N a all other ducts. In addition atticat insulation provides an amazing r 49 value rating the recommended attic r value rating for the maryland climate zone. R 6 supply in attic.

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. According to energystar gov the recommended r value for attic insulation is between r 30 and r 60. An insulation s efficiency is indicated by its r value. If you have cellulose insulation you ll need an inch or two less.

R value is the measure of your insulation s ability to resist heated or cooled air traveling through it. A higher r value means greater efficiency. Department of energy doe published r value recommendations based on specific heating and cooling needs and the cost of energy across the country by zip code. The higher the r value the better the thermal performance of the insulation.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. R 6 duct tightness cfm 100 ft2 4 or 3 if air handler not installed 4 or 3 if air handler not installed building air leakage 3 ach 3 ach fenestration u factor is another way to describe the insulation value of a window. Most areas of the country have a higher minimum r value recommendation but just about everywhere recommends up to 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.

Achieving greater r values in exterior walls. The r value indicated on the packaging tells how much thermal resistance the insulation provides per inch.