Is R 30 Insulation Good

The table below shows what levels of insulation are cost effective for different climates and.

Is r 30 insulation good.

Knauf insulation r 30 ecoroll unfaced fiberglass insulation roll 23 in. 90 grains might be approaching the ma. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Set your store to see local availability add to cart.

In the context of building and construction the r value is a measure of how well a two dimensional barrier such as a layer of insulation a window or a complete wall or ceiling resists the conductive flow of heat. 30 grains of black powder will drive that lead ball just fine. Whoa whoa david oswald you ve just entered the domain of the law of diminishing returns. 12 rolls model 689972 528 82 pallet 528 82 pallet delivery unavailable.

R value is a measure of insulation s ability to resist heat traveling through it. R value is the temperature difference per unit of heat flux needed to sustain one unit of heat flux between the warmer surface and colder surface of a barrier under steady state. Department of energy rates r 13 insulation as good for use in walls in southern areas of the country it rates r 19 insulation higher designating it as great that is because r 19 insulation provides more thermal insulation than r 13 does. Since i have no insulation i should see a huge difference in comfort and bills just from the r 30.

Here s what i mean. It appears that r 30 is no longer the standard minimum. Looks like r 38 to r 49 is more the current minimum. The higher the r value the better the thermal performance of the insulation.

R 30 ecobatt unfaced fiberglass insulation batt 24 in. Insulation insulation material when properly used can make your home more comfortable and energy efficient and can significantly reduce heating and cooling bills throughout the year. If the joists are 10 inches deep the cavity can take high density r 30 insulation which is 8 1 2 inches thick more than enough for floor insulation. Insulation level are specified by r value.

If the garage is open to the rafters the boards that support the roof use r 38 insulation between the rafters at the roof if they are 10 inches deep. Thanks for your help. Material type r value cost per square foot cost per square foot per r value fiberglass batt 3 5 12 inches thick 13 0 20 to 0 40 0 02 30 0 60 to 1 00 0 03. Will tackle underneath later as you suggested.