Attic Insulation R30 Vs R60

30 grains of black powder will drive that lead ball just fine.

Attic insulation r30 vs r60.

You ll commonly git a bit more of a bump from moving up from 3 of insulation in practice because that 3 is presumably leaving wood framing exposed between the insulation and the first layer of insulation that covers the wood framing has more of an effect since its breaks the wood framing path r3 6 as a heat leak. Another way to estimate the savings is a bit crude but there are 5 loss areas windows and doors walls ceilings floors and foundation and air leakage. On the original question more is better but the crossover from a cost benefit may not be there for r60. 90 grains might be approaching the ma.

Those up north will want anything from r49 to r60. Whoa whoa david oswald you ve just entered the domain of the law of diminishing returns. The bottom line is that although you can certainly put r 40 insulation under your slab or r 80 insulation in your walls it may not be the smartest thing to do. The more you use the better insulated your home will be.

I climbed up to attic and noticed that there are batts of insulation but not much blown in will post a picture. Home built in 2000. While there are also insulation recommendations for walls and floors this article will deal mainly with the oft overlooked attics. Here s what i mean.

Attic insulation is about r30 rolled batts with some blown in fiberglass above it. Take a look at the bigger picture and see whether you might be better served by reducing the size of the home finding ways to save on water heating appliances and plug loads or. An r60 attic not so much since the insulation slows the heat loss through the roof. Remember r 30 is great insulation and r 60 is over the hill.

Change r49 to r60 43. Assign 20 to each and you get 100 for each area. The thermal mass of the attic framing wood roof deck. My daughters room has cathedral ceilings and is always about 2 3 degrees cooler in winter and 2 3 degrees hotter is summer.

Sixty grains even faster. The exterior roof temperatures will often reach the outdoor dew point which can be 10f or more cooler than the overnight air temperatures so you get a bit of free overnight cooling from this lossy roof. Add insulation to attic. Cut that is half with the extra insulation and you save 50 per year.

Fwiw the recommendation for our region is r30 to r60 in an uninsulated attic so no help there. Existing 3 4 inches of insulation.