Attic Insulation R Value Maryland

However the climate that you live in will determine the r value level required to effectively keep your home at a consistent comfortable temperature.

Attic insulation r value maryland.

The r value indicated on the packaging tells how much thermal resistance the insulation provides per inch. 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. If you have cellulose insulation you ll need an inch or two less. R 6 supply in attic.

Value r 10 continuous or r 13 cavity 15 continuous or r 19 cavity duct r value 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. Get a free r value rating as a way to maximize the energy efficiency of both new and existing homes the u s.

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

You can achieve better thermal performance in your attic by adding an additional layer of insulation. R value is the measure of your insulation s ability to resist heated or cooled air traveling through it. 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. R 8 inside thermal envelope.

Most areas of the country have a higher minimum r value recommendation but just about everywhere recommends up to r 60. An insulation s efficiency is indicated by its r value.