Recommended insulation levels for retrofitting existing wood framed buildings.
How much insulation is required in an attic in texas.
The insulation in your attic should be at least 12 thick.
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.
In zone 2 the average minimum requirement for attic insulation is 9 inches of r30 fill.
The average recommended level is 17 inches of r60.
Dallas texas falls in climate zone three where attics are recommended to have an r value between 38 49 this means a minimum of 12 of insulation.
It depends on the type of insulator you use but the short answer is yes.
The average recommended level is 14 inches of r49.
Insulation professionals will be able to tell you how much insulation you need based on.
Loose fill cellulose on the other hand is a much heavier type of insulation which makes it very effective in low temperatures.
In zone 1 the average minimum requirement for attic insulation is 9 inches of r30 fill.
Note from this chart that the ideal r value differs for each part of your home.
Residents of southern and central texas should insulate their attics to at least r 30 or about 9 5 inches of conventional fiberglass batt insulation.
It is not uncommon to see 15 to 20 of insulation in a well insulated attic.
If you live in the texas panhandle consider increasing your insulation level to at least r 38.
The two types of attic insulation available for diy are loose fill insulation and batts insulation.
Further attic insulation can be done with attic tents which insulate the attic drop down stairs and slice your energy bill by about 145 annually.
Therefore a three inch thick board has an r value of 3.
The thicker the better.
Blown fiberglass installed in the attic has an r value of 2 2 per inch so 12 inches of it would give you an r value of 26 4 in your attic installation project.
Existing 3 4 inches of insulation.
Add insulation to attic.
What region you live in see the map below.
This weight however makes it too heavy to use in attic installations and it can settle over time losing as much as 20 of its effectiveness.