The R-value per inch of rigid insulation is typically around 4.0 to 6.5, depending on the specific type and brand of insulation.
The R-value of rigid foam insulation typically ranges from 4 to 8 per inch of thickness, indicating its effectiveness in resisting heat flow.
The typical costs associated with rigid foam insulation can vary depending on factors such as the type of foam, thickness, and area to be insulated. On average, the cost can range from 0.75 to 2.50 per square foot for materials, with installation costs adding an additional 1.50 to 3.00 per square foot. Overall, the total cost for rigid foam insulation for a typical home can range from 1,500 to 5,000.
From everything I have seen it would be about 12 inches for conventional fiber glass insulation available from Home Depot or Lowes. Polyiso insulation can give up to r-6 per inch. That equates to 7 inches for r-42.
Closed cell spray foam insulation is denser and provides a higher R-value per inch, making it more effective at insulating against heat transfer. It also acts as a vapor barrier and is more rigid, providing structural support. Open cell spray foam insulation is less dense and has a lower R-value per inch, but it is more flexible and allows for better sound absorption. It does not act as a vapor barrier and is typically used in interior applications.
The R-value of mineral wool insulation typically ranges from 3.0 to 3.7 per inch of thickness.
While drywall, or gypsum board, does give insulation value it is not a high amount, a 1/2" piece of drywall will only raise the r-value by .45, if you are looking to improve the insulation of a wall you are much better off using rigid foam insulation. An extruded polystyrene board, that's Styrofoam, of 1" thickness gives you an R-value of 5.00, which is over 5 times greater per inch than that of drywall. You can further improve the insulation value of a wall by add some kind of batt insulation in-between the studs.
The R-value of stucco typically ranges from 0.2 to 0.5 per inch of thickness. This is lower than most other insulation materials such as fiberglass or foam board, which have higher R-values ranging from 3.0 to 7.0 per inch. Therefore, stucco is not as effective as these materials in providing insulation against heat transfer.
The insulation value of stucco is relatively low compared to other building materials, typically ranging from R-0.2 to R-0.5 per inch of thickness.
Among the following materials, the one with the highest R-value per inch of thickness is typically closed-cell spray foam insulation.
From everything I have seen it would be about 12 inches for conventional fiber glass insulation available from Home Depot or Lowes. Polyiso insulation can give up to r-6 per inch. That equates to 7 inches for r-42.
The R-value of thin fiberglass insulation can vary, but it typically ranges from about 2.2 to 3.7 per inch of thickness. Thicker fiberglass insulation will generally have a higher R-value.
From everything I have seen it would be about 12 inches for conventional fiber glass insulation available from Home Depot or Lowes. Polyiso insulation can give up to r-6 per inch. That equates to 7 inches for r-42.