Minimum Blown Attic Thickness For The City Of Montgomery Al

Adeca alabama department of economic and community affairs.

Minimum blown attic thickness for the city of montgomery al.

For homes in the huntsville alabama area the attic should achieve an r value between r 25 and r 60 depending on the current insulation levels. Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

Wall insulation whenever exterior siding is removed on an. Minimum r value state local al alabama 2015 alabama commercial energy code 2 r 25 3 r 25 state local ak alaska 2012 alaska building energy efficiency standard 7 r 35 8 r 35 9 r 40 local only az arizona no statewide mandated r values phoenix 2012 iecc yuma 2009 iecc tucson 2012 iecc flagstaff 2009 iecc 2 r 20. Existing 3 4 inches of insulation.