Blown fiberglass attic insulation 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.
Insulation value for attic required in texas.
The required slab edge r values for heated slabs.
Insulation depth shall be the depth of the footing or 2 feet whichever is less in climate zones 2 3 for heated slabs.
The table below shows what levels of insulation are cost effective for different climates and.
What r value is best for my home.
For batts or rolls calculate.
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.
Each bag lists the required depths for a range of r values and the number of bags needed to cover 1 000 square feet at those depths.
The higher the r value the better the thermal performance of the insulation.
You can mix the type and material of insulation too.
Loose fill or batt the common term for blanket insulation.
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.
Uninsulated attic spaces are responsible for significant heat loss since heat rises in a building.
Insulation level are specified by r value.
The open cell polyurethane foam has an r value of 3 5 to 3 6 per inch with a price tag of 1 1 20 square foot.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc section.
The ideal attic insulation r value is different than the ideal wall insulation r value.
Measure your attic s square footage.
Make sure your home is properly insulated in all these locations.
For loose fill read labels.
Inspecting your attic insulation.
Achieving greater r values in attics.
Yes generally a higher r value means a more effective insulator but the highest r value possible may not be necessarily right for your project.
Insulation ratings can be improved by adding more layers of insulation.
For diy attic insulation you ve got two choices.
Diyers can use this foam for small jobs such as insulating door frames.
Recommended home insulation r values.
R value is a measure of insulation s ability to resist heat traveling through it.
