Reflective Attic Insulation R Value

Basically a product with a higher r value is better than a simliar product with a lower r value.

Reflective attic insulation r value.

Batts and rolls are available in widths suited to standard spacing of wall studs attic trusses or rafters and floor joists. You can achieve better thermal performance in your attic by adding an additional layer of insulation. This works to slow conductive heat. Air space equals r value if you don t provide air space this product provides almost no insulating value.

An easy to install double reflective double bubble insulation. If the product is simply doubled with no air space between the layers a very minimal benefit is obtained r 1 1 per layer for the reflective double bubble product. But for the homeowner who already has r 30 to r 38 insulation in the attic it won t help much. Cathedral ceiling crawl space radiant floor wall hvac duct water pipe garage door knee wall r 21.

Reflectix s stated r 14 r values for exterior walls are good only if the reflectix is paired up with r 13 fiberglass batt insulation. R values range from r 3 7 to r 21 depending on the applications. Achieving greater r values in exterior walls. With multiple layers of product and airspaces between each layer enhanced performance will be gained.

Radiant barriers reflect radiant heat. The higher the r value the better the thermal performance of the insulation. 2 inch x 4 inch walls can hold r 13 or r 15 batts. Recycled glass or sand that s melted and spun into fibers.

Traditional attic insulation has r value. Energy saving residential applications include. Both conductive and radiant heat are trying to enter your home on a hot summer day or leave on a winter day when you are running the heat inside. If you install 2 layers of a reflective insulation does the r value double.

Most estimates for installing radiant barriers reach in the thousands of dollars. As such a radiant barrier has no inherent r value. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need. R values themselves don t mean much alone unless they are used to compare the effectiveness of different r.